vue使用element-ui开发Tree，后端直接返回所有节点的数据，但是显示不出lable

1. vue使用element-ui开发Tree，后端直接返回所有节点的数据，但是显示不出lable
   
   

2. 代码块

   <template>
   <tree :data="treedata" :props="defaultProps" :icon-class="icontype" show-checkbox @node-click="handleNodeClick"></tree>                           
   </template>
   <script>
   export default {
   data(){
       return{
           defaultProps: {
               label: 'label',
               children: 'children',
           },
           icontype:'android-apps',
           count: 1,
           treedata:[],
           father:[],     
       }
   },
   mounted() {
       this.computHeight();
       this.getDatatree();
   },
   methods:{
       //content高度
       computHeight() {
           this.contentHeight = this.documentClientHeight - 50 - 30 - 2 - 40 - 40
       },
       getDatatree(){
           this.params = {
               mgdept: "aircon"
           },
           this.$api.RelationTag.arealistTree(this.params).then(res => {
               console.log(res.code);
               if (res.code === 0) {
                   const data=JSON.parse(res.list);
                   this.treedata = data;
                   console.log(this.treedata);                   
                   for (let i = 0; i < this.treedata.length; i++) {
                       this.props.label.push(this.treedata[i].label);
                       this.props.children.push(this.treedata[i].children);
                   }                                 
               }
           }).catch(error => {
               //this.$Message.info(error);
           })
       },
       handleNodeClick(treedata) {
           console.log(treedata);
       },
   
               数据：
               [{"children":[{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"MAU"},{"children":[{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"FFU"},{"children":[{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"NMAU"},{"children":[{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"SJP"},{"children":[{"children":[{"label":"1F"}],"label":"1#"},{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"}],"label":"GEX"},{"children":[{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"VOC"},{"children":[{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"AHU"},{"children":[{"children":[{"label":"3F"}],"label":"3#"},{"children":[{"label":"2F"}],"label":"2#"},{"children":[{"label":"4F"}],"label":"4#"},{"children":[{"label":"1F"}],"label":"1#"}],"label":"PGEX"}]
   

3. 图片：

检查一下名字与设置一不一样

const data=JSON.parse(res.list);
data和res.list分别是什么类型的
this.props.label.push(this.treedata[i].label);里面的props是什么东西，我没看到啊

最后解决了嘛

最后是怎么解决的呀，大佬们指点下