a-tree 树的全部展开和收起

ant-design-vue树a-tree需要实现全部展开和全部收起功能实现

 

this.$refs.tree.store 打印出来的是这样的数据，里面的expanded就是控制展开收起的功能 

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代码实现：

<div class="expand">
            <a-button size="small" @click="expandHandle">{
   {
              expandAll ? "全部收起" : "全部展开"
            }}</a-button>
          </div>
          <div class="func">
            <span>name</span>
            <span>value</span>
          </div>
          <a-tree
            :data="treeData"
            show-checkbox
            node-key="id"
            :default-expand-all="expandAll"
            :default-expanded-keys="defaultExpandedKeys"
            :expand-on-click-node="false"
            ref="tree"
            @check="handleCheck"
          >
            <span class="custom-tree-node" slot-scope="{ node, data }">
              <span>{
   { node.label }}</span>
              <span>{
   { data.type }}</span>
            </span>
          </a-tree>

methods方法
expandHandle() {
      console.log(this.$refs.tree.store);
      this.expandAll = !this.expandAll;
      this.expandNodes(this.$refs.tree.store.root);
    },
    // 遍历树形数据，设置每一项的expanded属性，实现展开收起
    expandNodes(node) {
      node.expanded = this.expandAll;
      for (let i = 0; i < node.childNodes.length; i++) {
        node.childNodes[i].expanded = this.expandAll;
        if (node.childNodes[i].childNodes.length > 0) {
          this.expandNodes(node.childNodes[i]);
        }
      }
    },