默认选中第一个节点

src/pages/config/pages/mechanismManage/index.vue

@@ -12,6 +12,8 @@
           :data="treeData"
           :props="defaultProps"
           default-expand-all
+          :current-node-key="nodeKeyId"
+          node-key="id"
           :filter-node-method="filterNode"
           highlight-current
           ref="tree"
@@ -166,6 +168,7 @@ export default {
   name: 'MechanismManage',
   data () {
     return {
+      nodeKeyId:'',
       searchForm: {
         uname:"",
         email:""
@@ -279,8 +282,12 @@ export default {
         _this: this,
         loading: 'treeLoading'
       }, res => {
-        console.log(res);
         this.treeData = res.data
+        console.log(this.treeData);
+        this.nodeKeyId = this.treeData[0].id
+        this.$nextTick(function () {
+          this.$refs.tree.setCurrentKey(this.nodeKeyId)
+        })
         this.id = res.data[0].id
         this.getData()
       }, e => {