需求要带回显，用了reserve-selection+row-key

 <el-table ref="selTable" v-loading="selectTableLoading" border :data="allData[this.selectDataPageInfo.page]" size="small" style="width: 100%;" height="400" :row-key="(row) => row.id" @selection-change="handleSelectionChange">
          <el-table-column type="selection" width="55" :reserve-selection="true" />
          <el-table-column prop="materialName" label="备品名称" />
          <el-table-column prop="materialTypeName" label="备品类型" />
          <el-table-column prop="materialBrand" label="备品品牌" />
          <el-table-column prop="materialModel" label="备品型号" />
          <el-table-column prop="stockCount" label="调拨数量" />
          <el-table-column prop="materialUnit" label="备品单位" />
        </el-table>
        <el-pagination
          v-if="selectDataFlag"
          :page-sizes="selectDataPageInfo.pageSizes"
          :page-size="selectDataPageInfo.size"
          :layout="selectDataPageInfo.layout"
          :total="selectDataPageInfo.total"
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
        />

//存放选中数据
    selectedEndAllData: [],
allData:[]
//分页器
 selectDataPageInfo: {
        total: 0,
        pageSizes: [10, 20, 30],
        layout: 'total, prev, pager, next',
        page: 0,//第几页
        size: 10
      },

//获取数据
getTableData() {
      if (this.selectDataPageInfo.page in this.allData) return
      this.selectTableLoading = true
      const tempObj = {
        page: this.selectDataPageInfo.page,
        size: this.selectDataPageInfo.size,
        ...this.selectInfo
      }
      crudMaterialOrderAdjust.getMaterialStockByCon(tempObj).then(res => {
        this.selectTableLoading = false
        this.allData[this.selectDataPageInfo.page] = res.content
        const allIds = this.form.children.map(m => m.id)
        this.allData[this.selectDataPageInfo.page].forEach(f => {
          if (allIds.includes(f.id)) {
            this.$refs.selTable.toggleRowSelection(f, true)
          }
        })
        this.selectDataPageInfo.total = res.totalElements
      }).catch(err => {
        this.selectTableLoading = false
        this.$message.error(err.response)
      })
    },

//弹窗的确认，取消函数
       selectDataSure() {
      this.selectDataFlag = false
      const hash = {}
      this.form.children = this.selectedEndAllData.reduce((pre, cur) => {
        hash[cur.id] ? '' : hash[cur.id] = true && pre.push(cur)
        return pre
      }, [])
      this.selectedEndAllData = []
    },
    selectDataCancle() {
      this.selectDataFlag = false
      this.$refs.selTable.clearSelection()
    },

表格高度自适应

主要借助window.onresize来监听浏览器窗口变化

data(){
    return {
  tableHeight: 0
    }
  },
  created() {
    this.tableHeight = window.innerHeight - 250
  },
  mounted() {
    window.onresize = () => {//挂载onresize 
      this.tableHeight = window.innerHeight - 250
    }
  },
  destroyed() {//销毁
    window.onresize = null
  },