element Tree树形控件 详解vue-element Tree树形控件填坑路

<el-form-item label="角色权限：">
 <el-tree :data="data2" 
  show-checkbox 
  node-key="id" 
  @check="handleNodeClick" 
  :default-expanded-keys="[]" 
  ref="tree" 
  :default-checked-keys="default_select" 
  :props="defaultProps">
 </el-tree>
</el-form-item>

data() {
  return {
   data2: [],
   defaultProps: {
    children: 'child',
    label: 'name'
   },
   menu_ids: [],
   // 默认选中
   default_select: [],
   role_id: 0,
  }
 },
 methods: {
  /**
   * 获取详情
   */
  getDetail() {
   let that = this;
   that.$http.post(that.adminApi.api_url + "/Role/show_edit", {
    token: that.token,
    role_id: that.role_id
   }, {
    emulateJSON: true
   }).then(
    function (res) {
     var data = res.body;
     if (data) {
      that.ruleForm.name = data.name;
      that.ruleForm.sort = data.sort;
      that.ruleForm.status = data.status.toString();
      
      
      /**重点开始*/
      if(typeof (data.menu_id) == 'object'){
       //转数组
       data.menu_id = Object.keys(data.menu_id).map(key=> data.menu_id[key]);
      }
      //赋值
      data.menu_id.forEach((value)=>{
       that.default_select.push(value);
      });

      setTimeout(function () {
       that.default_select.forEach((value)=>{
        that.$refs.tree.setChecked(value,true,false)
       });
      },100);
      that.menu_ids = data.menu_id;
      /**重点结束*/
     }
    });
  },

  /**
   * 属性控件
   */
  handleNodeClick(e, data) {
   console.log(data);
   console.log(e);
   this.menu_ids = data.checkedKeys
  },
 }