el-tree 树形组件回显设置默认选中

后台系统修改权限回显，设置this.$refs.tree.setChecked(设置的唯一key, true)

handleEdit (index, row) {

      this.basic = {}

      this.checkArr = []

      this.dialogTitle = '修改角色权限'

      this.dialogFormVisible = true

      this.updataDisable = true

      this.defaultCheckedArr = []

      //回显数据

      this.basic = {

        roleId: row.id,

        id: row.id,

        name: row.name,

        description: row.description

      }

      // 获取树形结构

      getMenuTree(row.id).then(res => {

        console.log(res)

        if (res.code === 0) {

          // 设置默认选中的

          for (const v of res.data) {

            if (v.checked === true) {

              console.log(v.id)

              this.$refs.tree.setChecked(v.id, true)

            }

          }

        }

      })

    }

当选中改变的时候 设置check-change方法就可以拿到

 cheChange (data, ischecked, checked) {
      this.checkArr = this.$refs.tree.getCheckedKeys().concat(this.$refs.tree.getHalfCheckedKeys()).join(',')
      console.log(this.checkArr)
    },