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 <el-tree
              ref="refTree"
              :data="treeData"
              show-checkbox
              node-key="id"
              highlight-current
              :props="defaultProps"
              default-expand-all
              :expand-on-click-node="false"
              :filter-node-method="filterTree"
              @node-click="nodeClick"
            >
</el-tree>

  // 获取菜单树
    getMenuTree() {
      const params = {
        name: '',
        link_url: '',
        parent_id: ''
      }
      this.spinShow = true
      getMenuTree(params)
        .then(res => {
          this.spinShow = false
          if (res.code == 200) {
            this.treeData = res.data
            this.treeIdRecursion(this.treeData)
          }
        })
        .catch(err => {
          this.spinShow = false
          console.log(err)
        })
    },

 // 递归判断是否含有已选中的id
    treeIdRecursion(treeD) {
      const treeIngIds = [29, 28]
      const treeDataAllIds = []
      for (let i = 0; i < treeD.length; i++) {
        if (treeD[i].children && treeD[i].children.length > 0) {
          this.treeIdRecursion(treeD[i].children)
        } else {
          treeDataAllIds.push(treeD[i].id)
          for (let j = 0; j < treeIngIds.length; j++) {
            if (treeDataAllIds.indexOf(treeIngIds[j]) > -1) {
              // 设置默认样式选中
              this.$nextTick(()=>{
                this.$refs.refTree.setCurrentKey(treeIngIds[j]);
              })
              // 设置复选框默认选中---回显
              this.$nextTick(() => {
                this.$refs.refTree.setCheckedKeys(treeIngIds)
              })
            }
          }
        }
      }
    },