最近在使用ant-design-vue做表格時队伟，遇到要做一個可伸縮列表格的需求腔稀，但是官網(wǎng)示例的代碼并不能直接使用盆昙，經(jīng)過一段時間研究以后發(fā)現(xiàn)了可以實現(xiàn)功能的方法。

經(jīng)過嘗試發(fā)現(xiàn)直接修改columns[index].width可改變表格列的寬度焊虏，這也是最核心的原理淡喜。
之后就需要想辦法實現(xiàn)這個功能，官方示例使用vue-draggable-resizable來實現(xiàn)拖拽诵闭，那我們就繼續(xù)使用這個插件炼团。

實現(xiàn)過程：
1.查看ant-design-vue中table的api后發(fā)現(xiàn)需要增加components的配置項
2.查看vue-draggable-resizable的示例增加拖動組件的配置，并在dragging事件中設(shè)置表格的寬度
3.動態(tài)創(chuàng)建vue-draggable-resizable組件

完整示例代碼

<template>
  <a-table bordered :columns="columns" :components="components" :data-source="data">
    <template v-slot:action>
      <a href="javascript:;">Delete</a>
    </template>
  </a-table>
</template>

<script>
import Vue from 'vue'
import VueDraggableResizable from 'vue-draggable-resizable'

Vue.component('vue-draggable-resizable', VueDraggableResizable)

export default {
  name: 'App',
  data() {
    this.components = {
      header: {
        cell: (h, props, children) => {
          const { key, ...restProps } = props
          console.log('ResizeableTitle', key)
          const col = this.columns.find(col => {
            const k = col.dataIndex || col.key
            return k === key
          })

          if (!col || !col.width) {
            return h('th', { ...restProps }, [...children])
          }

          const dragProps = {
            key: col.dataIndex || col.key,
            class: 'table-draggable-handle',
            attrs: {
              w: 10,
              x: col.width,
              z: 1,
              axis: 'x',
              draggable: true,
              resizable: false
            },
            on: {
              dragging: (x, y) => {
                col.width = Math.max(x, 1)
              }
            }
          }
          const drag = h('vue-draggable-resizable', { ...dragProps })
          return h('th', { ...restProps, class: 'resize-table-th' }, [...children, drag])
        }
      }
    }
    return {
      data: [
        {
          key: 0,
          date: '2018-02-11',
          amount: 120,
          type: 'income',
          note: 'transfer'
        },
        {
          key: 1,
          date: '2018-03-11',
          amount: 243,
          type: 'income',
          note: 'transfer'
        },
        {
          key: 2,
          date: '2018-04-11',
          amount: 98,
          type: 'income',
          note: 'transfer'
        }
      ],
      columns: [
        {
          title: 'Date',
          dataIndex: 'date',
          width: 200
        },
        {
          title: 'Amount',
          dataIndex: 'amount',
          width: 100
        },
        {
          title: 'Type',
          dataIndex: 'type',
          width: 100
        },
        {
          title: 'Note',
          dataIndex: 'note',
          width: 100
        },
        {
          title: 'Action',
          key: 'action',
          scopedSlots: { customRender: 'action' }
        }
      ]
    }
  }
}
</script>
<style>
.resize-table-th {
  position: relative;
}
.table-draggable-handle {
  /* width: 10px !important; */
  height: 100% !important;
  left: auto !important;
  right: -5px;
  cursor: col-resize;
  touch-action: none;
  border: none;
}
</style>