Vue draggable多选拖拽

时间:2022-06-03 宜简人气:0

前言

最近产品提出一个排序需求，希望能进行拖拽排序，我一想，vue2插件这么多，sortable.js、draggable分分钟实现了，但是还有一个需求希望能够实现多选拖拽，这个就有点麻烦，查询了许多资料，暂时没有发现能够多选的拖拽组件，如果自己写一个，既耗费时间，实现效果上必然没有draggable这种成熟轮子效果好，于是决定基于draggable做改进。

实现思路

我们知道draggable插件只要设置相同的group名字就能实现分组拖拽，如果我们渲染两个同名分组，控制第二个分组的显示与隐藏，鱼目混珠，就能实现简单的多选拖拽效果

1.通过group="task"设置两个同名分组，同时利用draggable=".card"属性，控制class名称，禁止单选

  <draggable group="task" v-model="dataList" @end="draggerEnd" class=""
        :class="show ? 'order-box-show' : 'order-box'" animation="300" draggable=".card">
        <transition-group>
          <div v-for="(item, index) in dataList" :key="index" class="box" @click="handleSelect(index)"
            :class="item.select || show ? 'card' : ''">{{ item.name }}
          </div>
        </transition-group>
      </draggable>
      <div class="position" v-show="show">
        <draggable group="task" v-model="dataList2" @end="draggerEnd" class="order-box" animation="300">
          <transition-group>
            <div v-for="(item, index) in dataList2" :key="index" class="boxs">
              <div>
                {{ item.name }}
              </div>
            </div>
          </transition-group>
        </draggable>

2.通过v-show="show"控制第二个分组的隐藏与展示，同时对数据做处理，并且在拖拽结束后，要在分组一中找到分组二拖拽过来的初始元素删掉

    const findIndex = this.dataList.findIndex((item => item.name === '选中元素展示区'))
      this.dataList.splice(findIndex, 1)

Demo全部代码

<template>
  <div>
    <div>
      <draggable group="task" v-model="dataList" @end="draggerEnd" class=""
        :class="show ? 'order-box-show' : 'order-box'" animation="300" draggable=".card">
        <transition-group>
          <div v-for="(item, index) in dataList" :key="index" class="box" @click="handleSelect(index)"
            :class="item.select || show ? 'card' : ''">{{ item.name }}
          </div>
        </transition-group>
      </draggable>
      <div class="position" v-show="show">
        <draggable group="task" v-model="dataList2" @end="draggerEnd" class="order-box" animation="300">
          <transition-group>
            <div v-for="(item, index) in dataList2" :key="index" class="boxs">
              <div>
                {{ item.name }}
              </div>
            </div>
          </transition-group>
        </draggable>
      </div>
    </div>
    <el-button style="marginLeft:50px" @click="handleStart">确认</el-button>
  </div>
</template>

<script>
import draggable from 'vuedraggable'
export default {
  components: {
    draggable
  },
  data() {
    return {
      dataList: [
      ],
      dataList2: [{ name: '选中元素展示区' }],
      show: false,
      selectArr: [],
    }
  },
  mounted() {
    for (var i = 0; i < 60; i++) {
      this.dataList.push({ name: i, select: false })
    }
  },
  methods: {
    handleSelect(index) {
      const data = JSON.parse(JSON.stringify(this.dataList))
      data[index].select = true
      this.selectArr.push({ ...data[index] })
      this.dataList = JSON.parse(JSON.stringify(data))
    },
    handleStart(e) {
      if (!this.selectArr.length) {
        return
      }
      this.show = true
      this.selectArr.forEach((item, index) => {
        const Index = this.dataList.findIndex(it => item.name === it.name)
        this.dataList.splice(Index, 1)
      })
    },
    draggerEnd(e) {
      const newIndex = e.newIndex
      this.dataList.splice(newIndex, 0, ...this.selectArr)
      const findIndex = this.dataList.findIndex((item => item.name === '选中元素展示区'))
      this.dataList.splice(findIndex, 1)
      this.show = false
    },


  }
}
</script>

<style lang="scss" scoped>
.order-box {
  padding: 20px 50px;
  display: flex;
  flex-wrap: wrap;

  >span {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
  }

  .box {
    width: 100px;
    height: 50px;
    background: rgb(7, 174, 215);
    margin-right: 10px;
    margin-bottom: 10px;
  }

  .boxs {
    width: 100px;
    height: 50px;
    background: rgb(215, 177, 7);
    margin-right: 10px;
    margin-bottom: 10px;
  }

  .card {
    background: rgb(128, 68, 0) !important;
  }
}

.order-box-show {
  padding: 20px 50px;
  display: flex;
  flex-wrap: wrap;

  >span {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
  }

  .box {
    width: 100px;
    height: 50px;
    background: rgb(7, 174, 215);
    margin-right: 10px;
    margin-bottom: 10px;
  }

  .boxs {
    width: 100px;
    height: 50px;
    background: rgb(215, 177, 7);
    margin-right: 10px;
    margin-bottom: 10px;
  }
}

.position {
  border: 1px solid red;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
}
</style>

Demo实现效果

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