vue中原生H5拖拽排序_拖拽图片也是同样的道理

原文地址【vue中原生H5拖拽排序_拖拽图片也是同样的道理】

H5有基于拖拽的事件机制，如果你还不熟悉，请看我之前的文章【拖拽上传】中有介绍。

原生拖拽API实现

由于比较简单直接上代码了：

<!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>拖拽排序</title>
  <script src="https://cdn.bootcdn.net/ajax/libs/vue/2.7.9/vue.min.js"></script>
  <style>
    ul {
      clear: both;
      list-style: none;
      overflow: hidden;
    }

    li {
      cursor: pointer;
      float: left;
      height: 32px;
      line-height: 30px;
      padding: 0 10px;
      color: #409eff;
      border: 1px solid #d9ecff;
      background-color: #ecf5ff;
    }
  </style>
</head>

<body>
  <div id="app"></div>
  <script>
    new Vue({
      template: `
      <div>
        <h1 style="padding-left: 30px;">连词成句</h1>
        <ul>
          <li v-for="(item,index) in list" :key="index" draggable="true" @dragstart="dragstart(item)"
            @dragenter="onDragEnter(item,$event)" @dragend="onDragEnd">{{item}}</li>
        </ul>
      </div>
      `,
      el: '#app',
      data() {
        return {
          oldWord: null,
          newWord: null,
          list: ["校长", "爷爷", "我", "给", "唱了首歌"]
        }
      },
      methods: {
        dragstart(word) {
          this.oldWord = word
        },
        // 记录移动过程中信息
        onDragEnter(word, e) {
          this.newWord = word
          e.preventDefault()
        },
        // 拖拽结束
        onDragEnd() {
          if (this.oldWord !== this.newWord) {
            let oldWordIndex = this.list.indexOf(this.oldWord);
            let newWordIndex = this.list.indexOf(this.newWord);
            let newList = [...this.list];

            // 删除老的节点
            newList.splice(oldWordIndex, 1);
            // 在列表中目标位置增加新的节点
            newList.splice(newWordIndex, 0, this.oldWord);
            this.list = [...newList];
          }

        }
      }
    })
  </script>
</body>

</html>

效果如下：

请添加图片描述

使用`vuedraggable`实现拖拽排序

vuedraggable 是基于sortable.js实现的，所以需要先引入sortable.js，如果是npm安装的，则无需再引入。

使用起来也比较简单，代码如下

<!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>拖拽排序</title>
  <script src="https://cdn.bootcdn.net/ajax/libs/vue/2.7.9/vue.min.js"></script>
  <script src="//cdn.jsdelivr.net/npm/sortablejs@1.8.4/Sortable.min.js"></script>
  <script src="//cdnjs.cloudflare.com/ajax/libs/Vue.Draggable/2.20.0/vuedraggable.umd.min.js"></script>
  <style>
    ul {
      clear: both;
      list-style: none;
      overflow: hidden;
    }

    li {
      cursor: pointer;
      float: left;
      height: 32px;
      line-height: 30px;
      padding: 0 10px;
      color: #409eff;
      border: 1px solid #d9ecff;
      background-color: #ecf5ff;
    }
  </style>
</head>

<body>
  <div id="app"></div>
  <script>
    let draggable = vuedraggable;
    new Vue({
      components: {draggable},
      template: `
      <div>
      <h1 style="padding-left: 30px;">连词成句</h1>
      <ul>
        <draggable v-model="list" group="people" @start="drag=true" @end="drag=false">
          <li v-for="(item,index) in list" :key="index">{{item}}</li>
        </draggable>
      </ul>
    </div>
      `,
      el: '#app',
      data() {
        return {
          drag: false,
          list: ["校长", "爷爷", "我", "给", "唱了首歌"]
        }
      }
    })
  </script>
</body>

</html>