微信小程序之自定义轮播图实例

业务需求:

5个图片轮番播放,可以左右滑动,点击指示点可以切换图片

重点说明:

由于微信小程序,整个项目编译后的大小不能超过1M
微信小程序之自定义轮播图实例_第1张图片

index.wxml:

这里使用小程序提供的组件
autoplay:自动播放
interval:自动切换时间
duration:滑动动画的时长
current:当前所在的页面
bindchange:current 改变时会触发 change 事件

由于组件提供的指示点样式比较单一,另外再自定义指示点的样式

<view class="recommend" >
  <view class="swiper-container">
    <swiper autoplay="auto" interval="5000" duration="500" current="{{swiperCurrent}}" bindchange="swiperChange" class="swiper">
      <block wx:for="{{slider}}" wx:key="unique">
        <swiper-item data-id="{{item.id}}" data-url="{{item.linkUrl}}">
          <image src="{{item.picUrl}}" class="img">image>
        swiper-item>
      block>
    swiper>
    <view class="dots">
      <block wx:for="{{slider}}" wx:key="unique">
        <view class="dot{{index == swiperCurrent ? ' active' : ''}}" bindtap="chuangEvent" id="{{index}}">{{index+1}}view>
      block>
    view>
  view>
view>

index.wxss:

.swiper-container{
  position: relative;
}
.swiper-container .swiper{
  height: 300rpx;
}
.swiper-container .swiper .img{
  width: 100%;
  height: 100%;
}
.swiper-container .dots{
  position: absolute;
  right: 40rpx;
  bottom: 20rpx;
  display: flex;
  justify-content: center;
}
.swiper-container .dots .dot{
  margin: 0 10rpx;
  width: 28rpx;
  height: 28rpx;
  background: #fff;
  border-radius: 50%;
  transition: all .6s;
  font: 300 18rpx/28rpx "microsoft yahei";
  text-align: center;
}
.swiper-container .dots .dot.active{
  background: #f80;
  color:#fff;
}

index.js:

//导入js
var util = require('../../utils/util.js')
Page({
  data: {
    slider: [],
    swiperCurrent: 0
  },
  onLoad: function () {
    var that = this;
//网络访问,获取轮播图的图片
    util.getRecommend(function(data){
      that.setData({
        slider: data.data.slider
      })
    }); 
  },
  //轮播图的切换事件
  swiperChange: function(e){
//只要把切换后当前的index传给组件的current属性即可
    this.setData({
      swiperCurrent: e.detail.current
    })
  },
  //点击指示点切换
  chuangEvent: function(e){
    this.setData({
      swiperCurrent: e.currentTarget.id
    })
  }
})

utils.js:

//网络访问
function getRecommend(callback) {
  wx.request({
    url: 'https://c.y.qq.com/musichall/fcgi-bin/fcg_yqqhomepagerecommend.fcg',
    data: {
      g_tk: 5381,
      uin: 0,
      format: 'json',
      inCharset: 'utf-8',
      outCharset: 'utf-8',
      notice: 0,
      platform: 'h5',
      needNewCode: 1,
      _: Date.now()
    },
    method: 'GET',
    header: {'content-Type': 'application/json'},
    success: function(res){
      if(res.statusCode == 200){
        callback(res.data);
      }
    }
  })
}
 
module.exports = {
  getRecommend: getRecommend
}

运行:

微信小程序之自定义轮播图实例_第2张图片

原文地址: https://blog.csdn.net/michael_ouyang/article/details/58591232

你可能感兴趣的:(前端学习,微信小程序)