element-ui 树形表格多选，单选，子节点取消，父节点同时取消

el-table：

先给拉取的数据添加一个 isSelect 属性

   //递归添加属性
    deepAdd(data) {
      if (!data) return;
      data.forEach((item) => {
        item.isSelect = false
        if (item.children instanceof Array) {
          this.deepAdd(item.children);
        }
      });
      return data;
    },

方法如下：

我的树形结构数据外有个主类 所以我传递的参数是 this.tableDate[0].children

     //我的树形结构是这样的
     tableData: [
        {
          id: 0,
          level: 0,
          parentId: 0,
          label: "主类",
          children: [
                           // 。。。。。。。。。。
            ],
        },
      ],

   //选中table赋值   如果需要获取选中的值 下方输出的就是
    
    handleSelectionChange(selection) {
        console.log(this.getChecked(this.tableData[0].children));
    },
    // 全选/取消选操作
    selectAll() {
      this.isAllSelect = !this.isAllSelect;
      this.changeChildren(this.tableData[0].children,this.isAllSelect)
    },
    //选中某一行
    selectTr(select,row){
      row.isSelect = !row.isSelect
      if(row.children instanceof Array){
        this.changeChildren(row.children,row.isSelect)
      }
      for (let i = 0; i < 6; i++) {
          this.changeParent(this.tableData[0].children)
      }
    },
    //选中所有children
    changeChildren(table,isAllSelect){
       table.forEach(item => {
        item.isSelect = isAllSelect
        this.$refs.multipleTable.toggleRowSelection(item,isAllSelect);
        if(item.children instanceof Array){
          this.changeChildren(item.children,isAllSelect)
        }
      })
    },
    //选中所有父元素
    changeParent(table){
       table.forEach(item => {
        if(item.children instanceof Array){
          this.$refs.multipleTable.toggleRowSelection(item,item.children.every(i => i.isSelect));
          item.isSelect = item.children.every(i => i.isSelect)
          this.changeParent(item.children)
        }
      })
    },
    //递归找选中的项
    getChecked(table) {
      let list = {ids:[],labels:[]};
      let fn = (table) => {
        for (let i = 0; i < table.length; i++) {
          if (table[i].isSelect) {
            list.ids.push(table[i].id)
            list.labels.push(table[i].label)
          }
          if (table[i].children && table[i].children.length > 0) {
            fn(table[i].children);
          }
        }
      };
      fn(table);
      return list;
    },

//选中某一行
    selectTr(select,row){
      row.isSelect = !row.isSelect
      if(row.children instanceof Array){
        this.changeChildren(row.children,row.isSelect)
      }
//这个for循环是 层级有几层就循环多少次就ok
      for (let i = 0; i < 6; i++) {
          this.changeParent(this.tableData[0].children)
      }
    },