web前端之拖拽API、vue3实现图片上传拖拽排序、拖放、投掷、复制、若依、vuedraggable
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- vue2+html5+原生dom+原生JavaScript实现跨区域拖放
- vue2实现跨区域拖放
- vue2+mousedown实现全屏拖动，全屏投掷
- vue3+element-plus+vuedraggable实现图片上传拖拽排序
- vue2+transition-group实现拖动排序
- 原生拖拽排序
vue2+html5+原生dom+原生JavaScript实现跨区域拖放
关键代码
// 放
function drop(ev) {
let data = ev.dataTransfer.getData("Text"),
i = ev.path[1].getAttribute("i"),
text = document.getElementById(data).cloneNode(true).innerText.trim();
if (i == null) return alert('请放置在文件名上');
if (app.fileS[i].divs.includes(text)) return alert('不能放重复数据');
app.fileS[i].divs.push(text);
for (let is = 0; is < app.fileS.length; is++) {
if (i == is) {
app.fileS[is].isShow = true;
} else {
app.fileS[is].isShow = false;
}
}
}
完整代码
gitee(码云) - mj01分支 - copyDragAndDrop 文件
vue2实现跨区域拖放
关键代码
dragend(item) {
console.log(item);
if (this.oldItem != this.newItem) {
let oldIndex = this.List.indexOf(this.oldItem);
let newIndex = this.List.indexOf(this.newItem);
let oldflag = false
let newflag = false
if (oldIndex === -1) {
oldflag = true
oldIndex = this.list.indexOf(this.oldItem);
}
if (newIndex === -1) {
newflag = true
newIndex = this.list.indexOf(this.newItem);
}
let newList = [...this.List]; // 中间数组，用于交换两个节点
let newlist = [...this.list]; // 中间数组，用于交换两个节点
if (!oldflag) {
newList.splice(oldIndex, 1);
} else {
newlist.splice(oldIndex, 1);
}
if (!newflag) {
newList.splice(newIndex, 0, this.oldItem);
} else {
newlist.splice(newIndex, 0, this.oldItem);
}
// 删除老的节点
// newList.splice(oldIndex, 1);
// // 在列表目标位置增加新的节点
// newList.splice(newIndex, 0, this.oldItem);
// // 更新this.List，触发transition-group的动画效果
this.List = [...newList];
this.list = [...newlist];
}
}
完整代码
gitee(码云) - mj01分支 - dragAndDrop 文件
vue2+mousedown实现全屏拖动，全屏投掷
html
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>鼠标滑动title>
<link rel="stylesheet" href="./index.css">
head>
<body>
<div id="app">
<div class="ctn ctn1">
<div class="sub sub1" v-for="(site, index) in list1">
<div class="dragCtn fixed" @mousedown="mousedown(site, $event)"
@mousemove.prevent='mousemove(site, $event)' @mouseup='mouseup(site, $event)'>
{{ site.name }}
div>
div>
div>
<div class="ctn ctn2">
<div class="sub sub2" v-for="(site, index) in list2">
<div class="dragCtn">
{{ index }} : {{ site.name }}
div>
div>
div>
div>
<script src="/node_modules/vue/dist/vue.js">script>
<script src="./index.js">script>
body>
html>
JavaScript
new Vue({
el: '#app',
data: {
list1: [{ name: '拖动我', index: 0 }],
list2: [{ name: 'a', index: 0 }, { name: 'b', index: 1 }, { name: 'c', index: 2 }, { name: 'd', index: 3 }],
vm: '',
sb_bkx: 0,
sb_bky: 0,
is_moving: false
},
methods: {
mousedown: function (site, event) {
var startx = event.x;
var starty = event.y;
this.sb_bkx = startx - event.target.offsetLeft;
this.sb_bky = starty - event.target.offsetTop;
this.is_moving = true;
},
mousemove: function (site, event) {
var endx = event.x - this.sb_bkx;
var endy = event.y - this.sb_bky;
var _this = this
if (this.is_moving) {
event.target.style.left = endx + 'px';
event.target.style.top = endy + 'px';
}
},
mouseup: function (e) {
this.is_moving = false;
}
}
});
css
.ctn {
line-height: 50px;
cursor: pointer;
font-size: 20px;
text-align: center;
float: left;
}
.sub:hover {
background: #e6dcdc;
color: white;
width: 100px;
}
.ctn1 {
border: 1px solid green;
width: 100px;
}
.ctn2 {
border: 1px solid black;
width: 100px;
margin-left: 50px;
}
.fixed {
width: 100px;
height: 100px;
position: fixed;
background: red;
left: 10px;
top: 10px;
cursor: move;
}
vue3+element-plus+vuedraggable实现图片上传拖拽排序
前言
安装对应的
vuedraggable组件
npm install [email protected] --save
package.json文件中记录对应的版本号为:"vuedraggable": "4.1.0"，这里要注意咯！！！克隆项目的时候这里的4.1.0可能会变为^4.1.0，一定要改为4.1.0；如果不是可以先卸载然后安装正确的版本即可。
如果版本不对会报错，并且不能运行。
本案例基于若依vue3前后端分离项目做二次开发
若依自带二次封装element-plus图片上传组件，但是没有实现拖拽排序功能。
于是又自己封装了一个ImageUploadDraggable图片上传组件，此组件基于若依自带的图片上传组件的基础上进行再次封装。
组件正常引入即可，可以全局引入或局部引入，引入方式跟我们自定的组件一样。
html
<el-form-item label="图片" class="ws_n">
<image-upload-draggable v-model="dialogForm.images" :limit="5">
image-upload-draggable>
el-form-item>
JavaScript
let info = reactive({
dialogForm: {
// 图片
images: []
}
}),
{
dialogForm
} = toRefs(info);
二次封装上传组件
<template>
<div class="component-upload-image">
<ul class="el-upload-list el-upload-list--picture-card">
<vue-draggable-next v-model="fileList">
<li v-for="(item, index) in fileList" :key="item.index" class="el-upload-list__item is-success animated">
<img :src="item.url" alt="" class="el-upload-list__item-thumbnail" />
<i class="el-icon-close">i>
<span class="el-upload-list__item-actions">
<span class="el-upload-list__item-preview" @click="handlePictureCardPreviewFileDetail(item)">
<el-icon>
<zoom-in>zoom-in>
el-icon>
span>
<span class="el-upload-list__item-delete" @click="handleRemoveFileDetail(index)">
<el-icon>
<delete>delete>
el-icon>
span>
span>
li>
vue-draggable-next>
ul>
<el-upload multiple :action="uploadImgUrl" list-type="picture-card" :on-success="handleUploadSuccess"
:before-upload="handleBeforeUpload" :limit="limit" :on-error="handleUploadError" :on-exceed="handleExceed"
ref="imageUpload" :show-file-list="false" :headers="headers" :class="{ hide: fileList.length >= limit }">
<el-icon class="avatar-uploader-icon">
<plus />
el-icon>
el-upload>
<div class="el-upload__tip" v-if="showTip">
请上传
<template v-if="fileSize">
大小不超过
<b style="color: #f56c6c">{{ fileSize }}MBb>
template>
<template v-if="fileType">
格式为
<b style="color: #f56c6c">{{ fileType.join("/") }}b>
template>
的文件
div>
<el-dialog v-model="dialogVisible" title="预览" width="800px" append-to-body>
<img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
el-dialog>
div>
template>
<script setup>
import { VueDraggableNext } from "vue-draggable-next";
import { getToken } from "@/utils/auth";
const props = defineProps({
modelValue: [String, Object, Array],
// 图片数量限制
limit: {
type: Number,
default: 5,
},
// 大小限制(MB)
fileSize: {
type: Number,
default: 5,
},
// 文件类型, 例如['png', 'jpg', 'jpeg']
fileType: {
type: Array,
default: () => ["png", "jpg", "jpeg"],
},
// 是否显示提示
isShowTip: {
type: Boolean,
default: true,
},
});
const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const dialogImageUrl = ref("");
const dialogVisible = ref(false);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
// 上传的图片服务器地址
const uploadImgUrl = ref(import.meta.env.VITE_APP_BASE_API + "/file/upload");
const headers = ref({
Authorization: "Bearer " + getToken(),
appid: import.meta.env.VITE_APP_ID,
});
const fileList = ref([]);
const showTip = computed(
() => props.isShowTip && (props.fileType || props.fileSize)
);
watch(
() => props.modelValue,
(val) => {
if (val) {
// 首先将值转为数组
const list = Array.isArray(val) ? val : props.modelValue.split(",");
// 然后将数组转为对象数组
fileList.value = list.map((item) => {
if (typeof item === "string") {
item = { name: item, url: item };
}
return item;
});
} else {
fileList.value = [];
return [];
}
},
{ deep: true, immediate: true }
);
// 上传前loading加载
function handleBeforeUpload(file) {
let isImg = false;
if (props.fileType.length) {
let fileExtension = "";
if (file.name.lastIndexOf(".") > -1) {
fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
}
isImg = props.fileType.some((type) => {
if (file.type.indexOf(type) > -1) return true;
if (fileExtension && fileExtension.indexOf(type) > -1) return true;
return false;
});
} else {
isImg = file.type.indexOf("image") > -1;
}
if (!isImg) {
proxy.$modal.msgError(
`文件格式不正确, 请上传${props.fileType.join("/")}图片格式文件!`
);
return false;
}
if (props.fileSize) {
const isLt = file.size / 1024 / 1024 < props.fileSize;
if (!isLt) {
proxy.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
return false;
}
}
proxy.$modal.loading("正在上传图片，请稍候...");
number.value++;
}
// 文件个数超出
function handleExceed() {
proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}
// 上传成功回调
function handleUploadSuccess(res, file) {
if (res.code === 0) {
uploadList.value.push({ name: res.data.url, url: res.data.url });
uploadedSuccessfully();
} else {
number.value--;
proxy.$modal.closeLoading();
proxy.$modal.msgError(res.msg);
proxy.$refs.imageUpload.handleRemove(file);
uploadedSuccessfully();
}
}
function handlePictureCardPreviewFileDetail(file) {
dialogImageUrl.value = file.url;
dialogVisible.value = true;
}
// 删除
function handleRemoveFileDetail(index) {
fileList.value.splice(index, 1);
}
// 上传结束处理
function uploadedSuccessfully() {
if (number.value > 0 && uploadList.value.length === number.value) {
fileList.value = fileList.value
.filter((f) => f.url !== undefined)
.concat(uploadList.value);
uploadList.value = [];
number.value = 0;
emit("update:modelValue", listToString(fileList.value));
proxy.$modal.closeLoading();
}
}
// 上传失败
function handleUploadError() {
proxy.$modal.msgError("上传图片失败");
proxy.$modal.closeLoading();
}
// 对象转成指定字符串分隔
function listToString(list, separator) {
let strs = "";
separator = separator || ",";
for (let i in list) {
if (undefined !== list[i].url && list[i].url.indexOf("blob:") !== 0) {
strs += list[i].url.replace(baseUrl, "") + separator;
}
}
return strs != "" ? strs.substr(0, strs.length - 1) : "";
}
script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
:deep(.hide .el-upload--picture-card) {
display: none;
}
style>
vue2+transition-group实现拖动排序
html
<transition-group id='app' name="drog" tag="ul">
<div draggable="true" v-for="(item, index) in lists" @dragstart="dragStart($event, index)" @dragover="allowDrop" @drop="drop($event, index)" v-bind:key="item">{{item}}div>
transition-group>
JavaScript
new Vue({
el: '#app',
data: {
lists: ['1: apple', '2: banana', '3: orange', '4: melon']
},
methods: {
// 取消默认行为
allowDrop(e){
e.preventDefault();
},
// 开始拖动
dragStart(e, index){
let tar = e.target;
e.dataTransfer.setData('Text', index);
if (tar.tagName.toLowerCase() == 'li') {
// console.log('drag start')
// console.log('drag Index: ' + index)
}
},
// 放置
drop(e, index){
this.allowDrop(e);
// console.log('drop index: ' + index);
//使用一个新数组重新排序后赋给原变量
let arr = this.lists.concat([]),
dragIndex = e.dataTransfer.getData('Text');
temp = arr.splice(dragIndex, 1);
arr.splice(index, 0, temp[0]);
// console.log('sort');
this.lists = arr;
}
}
});
原生拖拽排序
html
<ul id="idUl">
<li class="m_36 ta_c bc_87ceeb fs_68">1li>
<li class="m_36 ta_c bc_87ceeb fs_68">2li>
<li class="m_36 ta_c bc_87ceeb fs_68">3li>
<li class="m_36 ta_c bc_87ceeb fs_68">4li>
<li class="m_36 ta_c bc_87ceeb fs_68">5li>
ul>
JavaScript
(function () {
let ulList = document.querySelector('#idUl'),
liList = document.querySelectorAll('li'),
currentLi = undefined;
liList.forEach(item => item.draggable = "true");
ulList.addEventListener('dragstart', (e) => {
e.dataTransfer.effectAllowed = 'move';
currentLi = e.target;
setTimeout(() => currentLi.classList.add('bc_transparent color_transparent'), 0);
});
ulList.addEventListener('dragenter', (e) => {
e.preventDefault();
if (e.target === currentLi || e.target === ulList) return false;
let liArray = Array.from(ulList.childNodes),
currentIndex = liArray.indexOf(currentLi),
targetindex = liArray.indexOf(e.target)
if (currentIndex < targetindex) {
ulList.insertBefore(currentLi, e.target.nextElementSibling);
} else {
ulList.insertBefore(currentLi, e.target);
}
});
ulList.addEventListener('dragover', (e) => e.preventDefault());
ulList.addEventListener('dragend', (e) => currentLi.classList.remove('bc_transparent color_transparent'));
})();