uni-app实战之社区交友APP（4）首页开发
文章目录
- 前言
- 一、图文列表样式开发
-
- 1.pages.json配置
- 2.头像、昵称和关注按钮
- 3.标题和互动按钮
- 4.封装样式组件
- 二、列表组件优化
-
- 1.全局分割线开发
- 2.动画特效
- 3.关注功能完善
- 4.顶踩功能
- 三、滚动选项卡开发
-
- 1.选项卡动态显示
- 2.列表滑动实现
- 3.列表显示和同步
- 4.上拉加载开发
- 5.封装上拉加载组件
- 6.封装无数据默认组件
- 总结
前言
本文主要介绍了首页图文列表和滚动选项卡的开发：
图文列表的开发，包括顶部导航栏配置，图文列表项（头像、昵称、关注按钮、标题、标题封面图、点赞、踩、评论和分享）等的开发；
列表组件优化，包括分割线的开发和封装，动画特效实现，关注、顶踩功能的完善；
滚动选项卡开发，包括顶部选项卡开发、列表的同步显示和滑动，上拉加载的开发和封装，无数据组件开发等。
一、图文列表样式开发
1.pages.json配置
删除之前创建的demo页面及其目录，之前在配置pages.json时，"pages"中并未设置style，此时需要设置"app-plus"，即配置编译到 App 平台时的特定样式。
先下载发帖的图标，演示如下：
解压下载后的压缩包并将其中的iconfont.ttf复制到项目目录下的static目录下，并作为首页配置的app-plus>titleNView>buttons>fontSrc；
同时在我的项目页面选择Unicode，并复制发帖icon的代码，例如，修改为uni-app支持的格式\ue668，作为app-plus>titleNView>buttons>text。
关于app-plus的说明可参考文档https://uniapp.dcloud.io/collocation/pages?id=app-plus。
pages.json如下：
{
"pages": [ //pages数组中第一项表示应用启动页，参考：https://uniapp.dcloud.io/collocation/pages
{
"path": "pages/index/index",
"style": {
"app-plus": {
// 导航栏配置
"titleNView": {
// 搜索框配置
"searchInput": {
"align":"center",
"backgroundColor":"#F5F4F2",
"borderRadius":"4px",
"disabled": true,
"placeholder": "搜索帖子",
"placeholderColor": "#6D6C67"
},
// 按钮设置
"buttons": [
{
"color":"#333333",
"colorPressed":"#FD597C",
"float":"right",
"fontSize":"20px",
"fontSrc":"/static/iconfont.ttf",
"text": "\ue668"
}
]
}
}
}
}
,{
"path" : "pages/news/news",
"style" :
{
"navigationBarTitleText": "",
"enablePullDownRefresh": false
}
}
,{
"path" : "pages/msg/msg",
"style" :
{
"navigationBarTitleText": "",
"enablePullDownRefresh": false
}
}
,{
"path" : "pages/my/my",
"style" :
{
"navigationBarTitleText": "",
"enablePullDownRefresh": false
}
}
],
"globalStyle": {
"navigationBarTextStyle": "black",
"navigationBarTitleText": "Community Dating",
"navigationBarBackgroundColor": "#FFFFFF",
"backgroundColor": "#FFFFFF"
},
"tabBar": {
"color":"#323232",
"selectedColor":"#ED6384",
"backgroundColor":"#FFFFFF",
"borderStyle": "black",
"list": [
{
"pagePath": "pages/index/index",
"text": "首页",
"iconPath": "static/tabbar/index.png",
"selectedIconPath": "static/tabbar/indexed.png"
},
{
"pagePath": "pages/news/news",
"text": "动态",
"iconPath": "static/tabbar/news.png",
"selectedIconPath": "static/tabbar/newsed.png"
},
{
"pagePath": "pages/msg/msg",
"text": "消息",
"iconPath": "static/tabbar/paper.png",
"selectedIconPath": "static/tabbar/papered.png"
},
{
"pagePath": "pages/my/my",
"text": "我的",
"iconPath": "static/tabbar/home.png",
"selectedIconPath": "static/tabbar/homed.png"
}
]
}
}
显示：
可以看到，定义出了搜索框和发帖按钮，点击按钮会改变颜色。
2.头像、昵称和关注按钮
uni-app 支持的通用 css 单位包括 px、rpx：
- px
即屏幕像素。 - rpx
即响应式px，一种根据屏幕宽度自适应的动态单位。以750宽的屏幕为基准，750rpx恰好为屏幕宽度。
开发者可以通过设计稿基准宽度计算页面元素 rpx 值，设计稿 1px 与框架样式 1rpx 转换公式为设计稿 1px / 设计稿基准宽度 = 框架样式 1rpx / 750rpx，所以页面元素宽度在 uni-app 中的宽度计算公式为750 * 元素在设计稿中的宽度 / 设计稿基准宽度。
更多可参考https://uniapp.dcloud.io/frame?id=尺寸单位。
index.vue页面设置头像显示如下：
<template>
<view>
<image src="/static/img/userpic/12.jpg" style="width: 65rpx; height: 65rpx;">image>
view>
template>
<script>
export default {
data() {
return {
}
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显示：
在不同尺寸的设备上，其大小会自动缩放。
如需直接使用样式和素材等文件，可以直接点击加QQ群
963624318 ，在群文件夹uni-app实战之社区交友APP中下载即可。
先实现图文列表的第一部分，即头像、昵称和关注按钮，如下：
<template>
<view>
<view style="padding: 20rpx;">
<view style="display: flex; align-items: center; justify-content: space-between;">
<view style="display: flex; align-items: center;">
<image src="/static/img/userpic/12.jpg" mode="" style="width: 65rpx; height: 65rpx; border-radius: 100%; margin-right: 20rpx;" lazy-load>image>
<view>
<view style="font-size: 30rpx; line-height: 1.5;">Corleyview>
<text style="color: #9D9589; font-size: 25rpx; line-height: 1.5;">2021-01-24 上午11:20text>
view>
view>
<view style="width: 90rpx; height: 50rpx; display: flex; align-items: center; justify-content: center; border-radius: 5rpx; background-color: #FF4A6A; color: #FFFFFF;">
关注
view>
view>
<view>view>
<view>view>
<view>view>
view>
view>
template>
<script>
export default {
data() {
return {
}
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显示：
显然，实现了头像、昵称、发布日期和关注按钮的展示。
3.标题和互动按钮
现进一步实现列表项的第二部分，即发帖标题、点赞、评论和分享等。
先按照之前的方法在https://www.iconfont.cn/中添加点赞、踩、评论和分享的图标，再将iconfont.css更新至common/icon.css中。
index.vue如下：
<template>
<view>
<view style="padding: 20rpx;">
<view style="display: flex; align-items: center; justify-content: space-between;">
<view style="display: flex; align-items: center;">
<image src="/static/img/userpic/12.jpg" mode="" style="width: 65rpx; height: 65rpx; border-radius: 100%; margin-right: 20rpx;"
lazy-load>image>
<view>
<view style="font-size: 30rpx; line-height: 1.5;">Corleyview>
<text style="color: #9D9589; font-size: 25rpx; line-height: 1.5;">2021-01-24 上午11:20text>
view>
view>
<view style="width: 90rpx; height: 50rpx; display: flex; align-items: center; justify-content: center; border-radius: 5rpx; background-color: #FF4A6A; color: #FFFFFF;">
关注
view>
view>
<view style="font-size: 30rpx; margin: 10rpx 0;">
uni-app入门教程
view>
<image src="/static/img/datapic/42.jpg" style="height: 350rpx; width: 100%; border-radius: 5rpx;">image>
<view style="display: flex; align-items: center;">
<view style="flex: 1; display: flex; align-items: center; justify-content: center;">
<text class="iconfont icon-dianzan" style="margin-right: 20rpx;">text>
<text>1text>
view>
<view style="flex: 1; display: flex; align-items: center; justify-content: center;">
<text class="iconfont icon-cai" style="margin-right: 20rpx;">text>
<text>1text>
view>
<view style="flex: 1; display: flex; align-items: center; justify-content: center;">
<text class="iconfont icon-pinglun" style="margin-right: 20rpx;">text>
<text>1text>
view>
<view style="flex: 1; display: flex; align-items: center; justify-content: center;">
<text class="iconfont icon-fenxiang" style="margin-right: 20rpx;">text>
<text>1text>
view>
view>
view>
view>
template>
<script>
export default {
data() {
return {
}
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显示：
可以看到，已经实现了一个列表项的基本内容。
4.封装样式组件
虽然已经实现了列表，但是可以看到代码很冗余、有大量CSS重复代码，同时列表可以复用，也可以封装成组件，来提高代码的复用率。
先优化项目代码，将CSS样式提取到公共的CSS文件中。
common下新建文件base.css，保存公共样式如下：
/* 内外边距 */
.p-2 {
padding: 20rpx;
}
/* flex布局 */
.flex {
display: flex;
}
.align-center {
align-items: center;
}
.justify-between {
justify-content: space-between;
}
.justify-center {
justify-content: center;
}
.flex-1 {
flex: 1;
}
/* 圆角 */
.rounded-circle {
border-radius: 100%;
}
.rounded {
border-radius: 8rpx;
}
/* margin */
.mr-2 {
margin-right: 20rpx;
}
.my-1 {
margin-top: 10rpx;
margin-bottom: 0rpx;
}
/* 字体 */
.font-md {
font-size: 35rpx;
}
.font {
font-size: 30rpx;
}
.font-sm {
font-size: 25rpx;
}
/* 文字颜色 */
.text-white {
color: #FFFFFF;
}
.text-light-muted {
color: #A9A5A0;
}
/* 宽度 */
/* #ifndef APP-PLUS-NVUE */
.w-100 {
width: 100%;
}
/* #endif */
base.css文件不仅可以应用于该项目，也可以应用于其他uni-app项目。
common目录下新建common.css保存本项目全局样式，如下：
/* 本项目全局样式 */
.bg-main {
background-color: #FF4A6A;
}
App.vue中导入CSS文件，如下：
<script>
export default {
onLaunch: function() {
console.log('App Launch')
},
onShow: function() {
console.log('App Show')
},
onHide: function() {
console.log('App Hide')
}
}
script>
<style>
/*每个页面公共css */
/* 官方CSS库 */
@import url("./common/uni.css");
/* 自定义图标库 */
@import url("./common/icon.css");
/* 动画库 */
@import url("./common/animate.css");
/* 自定义样式库 */
@import url("./common/base.css");
/* 全局样式 */
@import url("./common/common.css");
style>
index.vue简化如下：
<template>
<view>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" src="/static/img/userpic/12.jpg" mode="" style="width: 65rpx; height: 65rpx;"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">Corleyview>
<text class="font-sm text-light-muted" style="line-height: 1.5;">2021-01-24 上午11:20text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white" style="width: 90rpx; height: 50rpx;">
关注
view>
view>
<view class="font my-1">
uni-app入门教程
view>
<image class="rounded w-100" src="/static/img/datapic/42.jpg" style="height: 350rpx;">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-dianzan mr-2">text>
<text>1text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-cai mr-2">text>
<text>1text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-pinglun mr-2">text>
<text>1text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-fenxiang mr-2">text>
<text>1text>
view>
view>
view>
view>
template>
<script>
export default {
data() {
return {
}
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显然，此时代码更加简洁美观，并且可以达到与之前同样的效果。
现进一步实现将列表项封装为组件。
首先替换数据、实现列表渲染，如下：
<template>
<view>
<block v-for="(item, index) in list" :key="index">
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white" style="width: 90rpx; height: 50rpx;">
{
{item.isFollow?'已关注':'关注'}}
view>
view>
<view class="font my-1">
{
{item.title}}
view>
<image class="rounded w-100" :src="item.titlepic" style="height: 350rpx;">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
block>
view>
template>
<script>
export default {
data() {
return {
list: [
{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support",
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显示：
显然，已经实现了列表渲染。
再实现封装到组件，项目下新建components目录，下新建common目录，下建common-list.vue作为列表组件，如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white" style="width: 90rpx; height: 50rpx;">
{
{item.isFollow?'已关注':'关注'}}
view>
view>
<view class="font my-1">
{
{item.title}}
view>
<image class="rounded w-100" :src="item.titlepic" style="height: 350rpx;">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
}
script>
<style>
style>
index.vue中导入并使用组件即可，如下：
<template>
<view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index">common-list>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [
{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support",
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
components: {
commonList
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
可以达到与之前相同的效果。
二、列表组件优化
1.全局分割线开发
全局分割线也是以组件的形式添加。
先在components/common下新建divider.vue如下：
<template>
<view style="height: 15rpx; background-color: #F5F5F4;">view>
template>
<script>
script>
<style>
style>
因为分割线可能在很多地方都会用到，所以可以添加到全局组件，main.js中添加如下：
import Vue from 'vue'
import App from './App'
Vue.config.productionTip = false
// 引入全局组件
import divider from './components/common/divider.vue';
Vue.component('divider', divider)
App.mpType = 'app'
const app = new Vue({
...App
})
app.$mount()
index.vue中无需导入、直接使用即可，如下：
<template>
<view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [
{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support",
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
components: {
commonList
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显示：
可以看到，有比较明显的分割线效果。
2.动画特效
现在进一步给列表组件添加动画特效。
因为有的帖子没有封面图，因此需要v-if进行判断，需要修改组件common-list.vue，如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white" style="width: 90rpx; height: 50rpx;">
{
{item.isFollow?'已关注':'关注'}}
view>
view>
<view class="font my-1">
{
{item.title}}
view>
<image v-if="item.titlepic" class="rounded w-100" :src="item.titlepic" style="height: 350rpx;">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
}
script>
<style>
style>
index.vue增加测试数据，如下：
<template>
<view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [
{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support",
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "support",
support_count: 2,
unsupport_count: 0
},
comment_count: 5,
share_count: 1
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
components: {
commonList
},
onLoad() {
},
methods: {
}
}
script>
<style>
style>
显示：
可以看到，没有封面图片，也能正常显示。
此时再实现点击关注按钮、添加动画特效，common-list.vue如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white animate__animated animate__faster" hover-class="animate__jello" style="width: 90rpx; height: 50rpx;">
{
{item.isFollow?'已关注':'关注'}}
view>
view>
<view class="font my-1">
{
{item.title}}
view>
<image v-if="item.titlepic" class="rounded w-100" :src="item.titlepic" style="height: 350rpx;">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
}
script>
<style>
style>
显示：
可以看到，点击关注按钮时，已实现了动画效果。
现进一步实现4个图标的特效，如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white animate__animated animate__faster" hover-class="animate__jello" style="width: 90rpx; height: 50rpx;">
{
{item.isFollow?'已关注':'关注'}}
view>
view>
<view class="font my-1">
{
{item.title}}
view>
<image v-if="item.titlepic" class="rounded w-100" :src="item.titlepic" style="height: 350rpx;">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
}
script>
<style>
style>
common.css如下：
/* 本项目全局样式 */
/* 背景 */
.bg-main {
background-color: #FF4A6A;
}
/* 文本颜色 */
.text-main {
color: #FF4A6A;
}
显示：
显然，也实现了动画效果。
3.关注功能完善
common-list组件需要定义接口，点击头像可以进入个人空间，点击关注按钮可以真正进行关注操作，点击点赞和踩实现数据更新，点击评论、转发、标题和图片等跳转到详情页，一般可以通过绑定事件实现。
common-list.vue组件绑定事件实现接口如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;" @click="openSpace"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view class="flex align-center justify-center rounded bg-main text-white animate__animated animate__faster" hover-class="animate__jello" style="width: 90rpx; height: 50rpx;" @click="follow">
{
{item.isFollow?'已关注':'关注'}}
view>
view>
<view class="font my-1" @click="openDetail">
{
{item.title}}
view>
<image v-if="item.titlepic" class="rounded w-100" :src="item.titlepic" style="height: 350rpx;" @click="openDetail">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main" @click="doSupport('support')">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main" @click="doSupport('unsupport')">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main" @click="openDetail">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main" @click="openDetail">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
methods: {
// 打开个人空间
openSpace(){
console.log('Space opened');
},
// 关注
follow(){
console.log('Followed');
},
// 进入详情页
openDetail(){
console.log('Detail opened');
},
// 顶踩操作
doSupport(type){
console.log(type)
}
}
}
script>
<style>
style>
显示：
可以看到，已经模拟出了接口操作。
现进一步实现关注功能，如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;" @click="openSpace"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view v-if="!item.isFollow" class="flex align-center justify-center rounded bg-main text-white animate__animated animate__faster"
hover-class="animate__jello" style="width: 90rpx; height: 50rpx;" @click="follow">
关注
view>
view>
<view class="font my-1" @click="openDetail">
{
{item.title}}
view>
<image v-if="item.titlepic" class="rounded w-100" :src="item.titlepic" style="height: 350rpx;" @click="openDetail">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="doSupport('support')">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="doSupport('unsupport')">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="openDetail">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="openDetail">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
methods: {
// 打开个人空间
openSpace() {
console.log('Space opened');
},
// 关注
follow() {
console.log('Followed');
// 通知父组件
this.$emit('follow', this.index);
},
// 进入详情页
openDetail() {
console.log('Detail opened');
},
// 顶踩操作
doSupport(type) {
console.log(type)
}
}
}
script>
<style>
style>
父组件index.vue如下：
<template>
<view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [
{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support",
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "support",
support_count: 2,
unsupport_count: 0
},
comment_count: 5,
share_count: 1
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
components: {
commonList
},
onLoad() {
},
methods: {
// 关注
follow(e){
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注'+this.list[e].username+'成功'
})
}
}
}
script>
<style>
style>
可以看到，实现了子组件common-list向父组件index的消息传递。
显示：
显然，实现了正常的关注功能。
4.顶踩功能
现完善顶踩功能接口。
顶踩有3种状态：顶、踩或未操作，点击顶按钮后，对应数值加1，并且颜色变为激活状态。
common-list.vue如下：
<template>
<view class="p-2">
<view class="flex align-center justify-between">
<view class="flex align-center">
<image class="rounded-circle mr-2" :src="item.userpic" mode="" style="width: 65rpx; height: 65rpx;" @click="openSpace"
lazy-load>image>
<view>
<view class="font" style="line-height: 1.5;">{
{item.username}}view>
<text class="font-sm text-light-muted" style="line-height: 1.5;">{
{item.newstime}}text>
view>
view>
<view v-if="!item.isFollow" class="flex align-center justify-center rounded bg-main text-white animate__animated animate__faster"
hover-class="animate__jello" style="width: 90rpx; height: 50rpx;" @click="follow">
关注
view>
view>
<view class="font my-1" @click="openDetail">
{
{item.title}}
view>
<image v-if="item.titlepic" class="rounded w-100" :src="item.titlepic" style="height: 350rpx;" @click="openDetail">image>
<view class="flex align-center">
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="doSupport('support')" :class="item.support.type === 'support' ? 'support-active' : ''">
<text class="iconfont icon-dianzan mr-2">text>
<text>{
{item.support.support_count > 0 ? item.support.support_count : '支持'}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="doSupport('unsupport')" :class="item.support.type === 'unsupport' ? 'support-active' : ''">
<text class="iconfont icon-cai mr-2">text>
<text>{
{item.support.unsupport_count > 0 ? item.support.unsupport_count : '反对'}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="openDetail">
<text class="iconfont icon-pinglun mr-2">text>
<text>{
{item.comment_count > 0 ? item.comment_count : '评论'}}text>
view>
<view class="flex align-center justify-center flex-1 animate__animated animate__faster" hover-class="animate__jello text-main"
@click="openDetail">
<text class="iconfont icon-fenxiang mr-2">text>
<text>{
{item.share_count > 0 ? item.share_count : '分享'}}text>
view>
view>
view>
template>
<script>
export default {
props: {
item: Object,
index: Number
},
methods: {
// 打开个人空间
openSpace() {
console.log('Space opened');
},
// 关注
follow() {
console.log('Followed');
// 通知父组件
this.$emit('follow', this.index);
},
// 进入详情页
openDetail() {
console.log('Detail opened');
},
// 顶踩操作
doSupport(type) {
console.log(type);
// 通知父组件
this.$emit('doSupport', {
type,
index: this.index
})
}
}
}
script>
<style>
.support-active {
color: #FF4A6A;
}
style>
index.vue如下：
<template>
<view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
components: {
commonList
},
onLoad() {
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
}
}
}
script>
<style>
style>
在父组件和子组件中进行了一系列优化，包括图标颜色变化，限制用户要么为顶要么为踩、并且只能踩顶一次、不能多次踩顶，次数为0时显示文本等。
显示：
显然，已经实现了顶踩的基本功能。
三、滚动选项卡开发
1.选项卡动态显示
滚动选项卡采用scroll-view组件实现，其scroll-into-view属性可以加速开发。
先实现滚动选项卡，base.css设置scroll-view样式如下：
/* 内外边距 */
.p-2 {
padding: 20rpx;
}
/* flex布局 */
.flex {
display: flex;
}
.align-center {
align-items: center;
}
.justify-between {
justify-content: space-between;
}
.justify-center {
justify-content: center;
}
.flex-1 {
flex: 1;
}
/* 圆角 */
.rounded-circle {
border-radius: 100%;
}
.rounded {
border-radius: 8rpx;
}
/* margin */
.mr-2 {
margin-right: 20rpx;
}
.my-1 {
margin-top: 10rpx;
margin-bottom: 0rpx;
}
/* padding */
.px-5 {
padding-left: 50rpx;
padding-right: 50rpx;
}
.py-3 {
padding-top: 30rpx;
padding-bottom: 30rpx;
}
/* 字体 */
.font-md {
font-size: 35rpx;
}
.font {
font-size: 30rpx;
}
.font-sm {
font-size: 25rpx;
}
/* 文字颜色 */
.text-white {
color: #FFFFFF;
}
.text-light-muted {
color: #A9A5A0;
}
/* 宽度 */
/* #ifndef APP-PLUS-NVUE */
.w-100 {
width: 100%;
}
/* #endif */
/* scroll-view */
/* #ifndef APP-PLUS-NVUE */
.scroll-row {
width: 100%;
white-space: nowrap;
}
.scroll-row-item {
display: inline-block !important;
}
/* #endif */
index.vue中增加滚动选项卡如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row">
<view v-for="i in 20" :key="i" class="scroll-row-item px-5 py-3">{
{i}}view>
scroll-view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
},
components: {
commonList
},
onLoad() {
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
}
}
}
script>
<style>
style>
显示：
可以看到，已经实现了滚动。
现实现选项卡内容显示，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row ">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index" :class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''">{
{item.name}}view>
scroll-view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
}
],
tabIndex: 0
}
},
components: {
commonList
},
onLoad() {
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
}
}
}
script>
<style>
style>
base.css如下：
/* 内外边距 */
.p-2 {
padding: 20rpx;
}
/* flex布局 */
.flex {
display: flex;
}
.align-center {
align-items: center;
}
.justify-between {
justify-content: space-between;
}
.justify-center {
justify-content: center;
}
.flex-1 {
flex: 1;
}
/* 圆角 */
.rounded-circle {
border-radius: 100%;
}
.rounded {
border-radius: 8rpx;
}
/* margin */
.mr-2 {
margin-right: 20rpx;
}
.my-1 {
margin-top: 10rpx;
margin-bottom: 0rpx;
}
/* padding */
.px-5 {
padding-left: 50rpx;
padding-right: 50rpx;
}
.px-3 {
padding-left: 30rpx;
padding-right: 30rpx;
}
.py-3 {
padding-top: 30rpx;
padding-bottom: 30rpx;
}
.py-2 {
padding-top: 20rpx;
padding-bottom: 20rpx;
}
/* 字体 */
.font-lg {
font-size: 40rpx;
}
.font-md {
font-size: 35rpx;
}
.font {
font-size: 30rpx;
}
.font-sm {
font-size: 25rpx;
}
.font-weight-bold {
font-weight: bold;
}
/* 文字颜色 */
.text-white {
color: #FFFFFF;
}
.text-light-muted {
color: #A9A5A0;
}
/* 宽度 */
/* #ifndef APP-PLUS-NVUE */
.w-100 {
width: 100%;
}
/* #endif */
/* scroll-view */
/* #ifndef APP-PLUS-NVUE */
.scroll-row {
width: 100%;
white-space: nowrap;
}
.scroll-row-item {
display: inline-block !important;
}
/* #endif */
显示：
再绑定事件实现动态滚动和动画显示的效果，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: ''
}
},
components: {
commonList
},
onLoad() {
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index){
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
}
}
}
script>
<style>
style>
显示：
可以看到，已经实现了动态滑动。
2.列表滑动实现
现进一步实现点击选项卡，下面显示对应的列表，使用swiper（滑块视图容器）实现，可以做轮播图和滑动列表，其常见属性和含义如下：
| 属性名 | 类型 | 默认值 | 含义 |
|---|---|---|---|
| indicator-dots | Boolean | false | 是否显示面板指示点 |
| autoplay | Boolean | false | 是否自动切换 |
| current | Number | 0 | 当前所在滑块的 index |
| interval | Number | 5000 | 自动切换时间间隔 |
| duration | Number | 500 | 滑动动画时长 |
具体可参考https://uniapp.dcloud.io/component/swiper。
先实现滑块，并与上面的选项卡联动，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab">
<swiper-item v-for="(item, index) in tabBars" :key="index">
<view class="swiper-item">{
{item.name}}view>
swiper-item>
swiper>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: ''
}
},
components: {
commonList
},
onLoad() {
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index){
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
}
}
script>
<style>
style>
显示：
可以看到，实现了滑块，并且滑块可以和选项卡实现联动同步。
现实现滑块列表示意，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in tabBars" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'">
<view v-for="i in 100" :key="i">{
{i}}view>
scroll-view>
swiper-item>
swiper>
<block v-for="(item, index) in list" :key="index">
<common-list :item="item" :index="index" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList
},
onLoad() {
uni.getSystemInfo({
success:function(res){
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
})
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
}
}
}
script>
<style>
style>
为了给swiper设置高度，在生命周期onLoad()通过uni.getSystemInfo()获取windowHeight，即可使用窗口高度，具体为屏幕高度除去NavigationBar和TabBar的高度，再减去选项卡的高度（调用uni.upx2px()转化为以px为单位）。
显示：
可以看到，实现了列表滑动。
3.列表显示和同步
现完善列表项，将之前实现的block放入swiper中，并根据顶部选项卡显示不同的列表。
index.vue如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
let obj = {
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
arr.push(obj)
}
this.newsList = arr;
}
}
}
script>
<style>
style>
显示：
可以看到，已经实现了动态切换和显示数据。
4.上拉加载开发
现实现上拉到底部加载数据，需要实现各个选项卡独立上拉加载。
先实现基本的下拉加载，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'" @scrolltolower="loadMore(index)">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
<view class="flex align-center justify-center py-3">
<text class="font text-light-muted">{
{item.loadmore}}text>
view>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
// 生成列表模板
let obj = {
// 3种状态：1.上拉加载更多；2.加载中...；3.没有更多了。
loadmore: "上拉加载更多",
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
arr.push(obj)
}
this.newsList = arr;
},
// 上拉加载更多
loadMore(index) {
this.newsList[index].loadmore = '加载中...';
}
}
}
script>
<style>
style>
显示：
可以看到，在下拉到底之前，消息为上拉加载更多，到底后触发@scrolltolower事件，变为加载中...。
再实现模拟加载更多数据，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'" @scrolltolower="loadMore(index)">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
<view class="flex align-center justify-center py-3">
<text class="font text-light-muted">{
{item.loadmore}}text>
view>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
// 生成列表模板
let obj = {
// 3种状态：1.上拉加载更多；2.加载中...；3.没有更多了。
loadmore: "上拉加载更多",
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
arr.push(obj)
}
this.newsList = arr;
},
// 上拉加载更多
loadMore(index) {
// 获取当前列表
let item = this.newsList[index];
// 修改当前列表加载状态
item.loadmore = '加载中...';
// 模拟数据请求
setTimeout(()=>{
// 加载数据
item.list = [...item.list, ...item.list];
// 恢复加载状态
this.newsList[index].loadmore = '上拉加载更多';
}, 2000)
}
}
}
script>
<style>
style>
其中，[...item.list, ...item.list]是ES6的语法，为扩展运算符，即将item.list再复制一份；
之所以可以通过操作item变量来操作数据，是因为指向了相同的地址，即同一个引用。
显示：
可以看到，模拟出了加载更多数据。
5.封装上拉加载组件
前面实现的上拉加载更多并没有进行判断，可以一直向下滑动加载更多，显然这是不合理的，因此需要进行判断。
index.vue如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'" @scrolltolower="loadMore(index)">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
<view class="flex align-center justify-center py-3">
<text class="font text-light-muted">{
{item.loadmore}}text>
view>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
// 生成列表模板
let obj = {
// 3种状态：1.上拉加载更多；2.加载中...；3.没有更多了。
loadmore: "上拉加载更多",
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
arr.push(obj)
}
this.newsList = arr;
},
// 上拉加载更多
loadMore(index) {
// 获取当前列表
let item = this.newsList[index];
// 判断是否处于可加载状态
if (item.loadmore !== '上拉加载更多') return;
// 修改当前列表加载状态
item.loadmore = '加载中...';
// 模拟数据请求
setTimeout(()=>{
// 加载数据
item.list = [...item.list, ...item.list];
// 恢复加载状态
this.newsList[index].loadmore = '上拉加载更多';
}, 2000)
}
}
}
script>
<style>
style>
效果与之前相同，如果loadmore不为上拉加载更多，则会停止加载更多数据。
现将下拉加载更多封装为组件，components/common下新建load-more.vue如下：
<template>
<view class="flex align-center justify-center py-3">
<text class="font text-light-muted">{
{loadmore}}text>
view>
template>
<script>
export default {
props: ['loadmore']
}
script>
<style>
style>
index.vue中使用组件如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'" @scrolltolower="loadMore(index)">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
<load-more :loadmore="item.loadmore">load-more>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
import commonList from '@/components/common/common-list.vue';
import loadMore from '@/components/common/load-more.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList,
loadMore
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
// 生成列表模板
let obj = {
// 3种状态：1.上拉加载更多；2.加载中...；3.没有更多了。
loadmore: "上拉加载更多",
list: [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
]
}
arr.push(obj)
}
this.newsList = arr;
},
// 上拉加载更多
loadMore(index) {
// 获取当前列表
let item = this.newsList[index];
// 判断是否处于可加载状态
if (item.loadmore !== '上拉加载更多') return;
// 修改当前列表加载状态
item.loadmore = '加载中...';
// 模拟数据请求
setTimeout(()=>{
// 加载数据
item.list = [...item.list, ...item.list];
// 恢复加载状态
this.newsList[index].loadmore = '上拉加载更多';
}, 2000)
}
}
}
script>
<style>
style>
效果与之前相同。
6.封装无数据默认组件
先实现没有数据的情况，如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'" @scrolltolower="loadMore(index)">
<template v-if="item.list.length > 0">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
<load-more :loadmore="item.loadmore">load-more>
template>
<template v-else>
<view class="flex flex-column align-center justify-center pt-7">
<image src="@/static/common/nothing.jpg" style="width: 300rpx; height: 300rpx;">image>
<text class="font-md">这里什么都没有哦~text>
view>
template>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
const test_data = [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
];
import commonList from '@/components/common/common-list.vue';
import loadMore from '@/components/common/load-more.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList,
loadMore
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
// 生成列表模板
let obj = {
// 3种状态：1.上拉加载更多；2.加载中...；3.没有更多了。
loadmore: "上拉加载更多",
list: []
}
if (i % 3 !== 2) {
obj.list = test_data;
}
arr.push(obj)
}
this.newsList = arr;
},
// 上拉加载更多
loadMore(index) {
// 获取当前列表
let item = this.newsList[index];
// 判断是否处于可加载状态
if (item.loadmore !== '上拉加载更多') return;
// 修改当前列表加载状态
item.loadmore = '加载中...';
// 模拟数据请求
setTimeout(() => {
// 加载数据
item.list = [...item.list, ...item.list];
// 恢复加载状态
this.newsList[index].loadmore = '上拉加载更多';
}, 2000)
}
}
}
script>
<style>
style>
base.css定义样式如下：
/* 内外边距 */
.p-2 {
padding: 20rpx;
}
/* flex布局 */
.flex {
display: flex;
}
.flex-column {
flex-direction: column;
}
.align-center {
align-items: center;
}
.justify-between {
justify-content: space-between;
}
.justify-center {
justify-content: center;
}
.flex-1 {
flex: 1;
}
/* 圆角 */
.rounded-circle {
border-radius: 100%;
}
.rounded {
border-radius: 8rpx;
}
/* margin */
.mr-2 {
margin-right: 20rpx;
}
.my-1 {
margin-top: 10rpx;
margin-bottom: 0rpx;
}
/* padding */
.px-5 {
padding-left: 50rpx;
padding-right: 50rpx;
}
.px-3 {
padding-left: 30rpx;
padding-right: 30rpx;
}
.py-3 {
padding-top: 30rpx;
padding-bottom: 30rpx;
}
.py-2 {
padding-top: 20rpx;
padding-bottom: 20rpx;
}
.pt-7 {
padding-top: 70rpx;
}
/* 字体 */
.font-lg {
font-size: 40rpx;
}
.font-md {
font-size: 35rpx;
}
.font {
font-size: 30rpx;
}
.font-sm {
font-size: 25rpx;
}
.font-weight-bold {
font-weight: bold;
}
/* 文字颜色 */
.text-white {
color: #FFFFFF;
}
.text-light-muted {
color: #A9A5A0;
}
/* 宽度 */
/* #ifndef APP-PLUS-NVUE */
.w-100 {
width: 100%;
}
/* #endif */
/* scroll-view */
/* #ifndef APP-PLUS-NVUE */
.scroll-row {
width: 100%;
white-space: nowrap;
}
.scroll-row-item {
display: inline-block !important;
}
/* #endif */
显示：
可以看到，部分页面没有数据，显示的是图片和提示文字。
再实现封装为组件，components/common下新建no-thing.vue如下：
<template>
<view class="flex flex-column align-center justify-center pt-7">
<image src="@/static/common/nothing.jpg" style="width: 300rpx; height: 300rpx;">image>
<text class="font-md">这里什么都没有哦~text>
view>
template>
<script>
script>
<style>
style>
main.js中引入全局组件如下：
import Vue from 'vue'
import App from './App'
Vue.config.productionTip = false
// 引入全局组件
import divider from './components/common/divider.vue';
Vue.component('divider', divider)
import noThing from './components/common/no-thing.vue';
Vue.component('no-thing', noThing)
App.mpType = 'app'
const app = new Vue({
...App
})
app.$mount()
index.vue中使用全局组件如下：
<template>
<view>
<scroll-view scroll-x="true" class="scroll-row" :scroll-into-view="scrollInto" :scroll-with-animation="true" style="height: 100rpx;">
<view v-for="(item, index) in tabBars" :key="index" class="scroll-row-item px-3 py-2 font-md" :id="'tab'+index"
:class="tabIndex === index ? 'text-main font-lg font-weight-bold' : ''" @click="changeTab(index)">{
{item.name}}view>
scroll-view>
<swiper :duration="150" :current="tabIndex" @change="onChangeTab" :style="'height: '+scrollH+'px;'">
<swiper-item v-for="(item, index) in newsList" :key="index">
<scroll-view scroll-y="true" :style="'height: '+scrollH+'px;'" @scrolltolower="loadMore(index)">
<template v-if="item.list.length > 0">
<block v-for="(item2, index2) in item.list" :key="index2">
<common-list :item="item2" :index="index2" @follow="follow" @doSupport="doSupport">common-list>
<divider>divider>
block>
<load-more :loadmore="item.loadmore">load-more>
template>
<template v-else>
<no-thing>no-thing>
template>
scroll-view>
swiper-item>
swiper>
view>
template>
<script>
const test_data = [{
username: "Corley",
userpic: "/static/img/userpic/12.jpg",
newstime: "2021-01-24 上午11:30",
isFollow: false,
title: "uni-app入门教程",
titlepic: "/static/img/datapic/42.jpg",
support: {
type: "support", // 顶
support_count: 1,
unsupport_count: 2
},
comment_count: 2,
share_count: 2
},
{
username: "Brittany",
userpic: "/static/img/userpic/16.jpg",
newstime: "2021-01-24 下午14:00",
isFollow: false,
title: "商业数据分析从入门到入职",
support: {
type: "unsupport", // 踩
support_count: 2,
unsupport_count: 3
},
comment_count: 5,
share_count: 1
},
{
username: "Jessica",
userpic: "/static/img/userpic/7.jpg",
newstime: "2021-01-24 下午14:44",
isFollow: true,
title: "Django+Vue开发生鲜电商平台",
titlepic: "/static/img/datapic/11.jpg",
support: {
type: "", // 未操作
support_count: 2,
unsupport_count: 7
},
comment_count: 0,
share_count: 2
},
{
username: "Ashley",
userpic: "/static/img/userpic/20.jpg",
newstime: "2021-01-24 下午18:20",
isFollow: true,
title: "uni-app实战之社区交友APP",
titlepic: "/static/img/datapic/30.jpg",
support: {
type: "support",
support_count: 5,
unsupport_count: 1
},
comment_count: 3,
share_count: 0
}
];
import commonList from '@/components/common/common-list.vue';
import loadMore from '@/components/common/load-more.vue';
export default {
data() {
return {
newsList: [],
// 顶部选项卡
tabBars: [{
name: '关注'
},
{
name: '推荐'
},
{
name: '体育'
},
{
name: '热点'
},
{
name: '财经'
},
{
name: '娱乐'
},
{
name: '军事'
},
{
name: '历史'
},
{
name: '本地'
}
],
tabIndex: 0,
scrollInto: '',
// 列表高度
scrollH: 600
}
},
components: {
commonList,
loadMore
},
onLoad() {
uni.getSystemInfo({
success: function(res) {
console.log(res);
this.scrollH = res.windowHeight - uni.upx2px(100);
}
}),
// 根据选项生成列表
this.getData();
},
methods: {
// 关注
follow(e) {
console.log('Index followed');
console.log(e);
this.list[e].isFollow = true;
uni.showToast({
title: '关注' + this.list[e].username + '成功'
})
},
// 顶踩操作
doSupport(e) {
console.log(e);
// 获取当前列表项
let item = this.list[e.index];
let msg = e.type === 'support' ? '顶' : '踩';
// 之前未顶踩过
if (item.support.type === '') {
item.support[e.type + '_count']++;
}
// 之前已顶过并且现在的操作为踩，则顶-1、踩+1
else if (item.support.type === 'support' && e.type === 'unsupport') {
item.support.support_count--;
item.support.unsupport_count++;
}
// 之前已踩过并且现在的操作为顶，则踩-1、顶+1
else if (item.support.type === 'unsupport' && e.type === 'support') {
item.support.unsupport_count--;
item.support.support_count++;
}
item.support.type = e.type;
uni.showToast({
title: msg + '成功'
})
},
// 切换选项
changeTab(index) {
if (this.tabIndex === index) {
return;
}
this.tabIndex = index;
// 滚动到指定元素
this.scrollInto = 'tab' + index;
},
// 监听滑动
onChangeTab(e) {
console.log(e);
this.changeTab(e.detail.current);
},
// 获取数据
getData() {
var arr = [];
for (let i = 0; i < this.tabBars.length; i++) {
// 生成列表模板
let obj = {
// 3种状态：1.上拉加载更多；2.加载中...；3.没有更多了。
loadmore: "上拉加载更多",
list: []
}
if (i % 3 !== 2) {
obj.list = test_data;
}
arr.push(obj)
}
this.newsList = arr;
},
// 上拉加载更多
loadMore(index) {
// 获取当前列表
let item = this.newsList[index];
// 判断是否处于可加载状态
if (item.loadmore !== '上拉加载更多') return;
// 修改当前列表加载状态
item.loadmore = '加载中...';
// 模拟数据请求
setTimeout(() => {
// 加载数据
item.list = [...item.list, ...item.list];
// 恢复加载状态
this.newsList[index].loadmore = '上拉加载更多';
}, 2000)
}
}
}
script>
<style>
style>
效果与之前相同。
总结
首页的开发标志着进入正式的开发阶段，代码量逐渐增多、逻辑也逐渐复杂，图文列表和滚动选项卡的开发业务逻辑较多，因此也进行了大量的优化，包括组件封装和CSS样式提取等，这都有利于项目的维护和扩展。