<div class="expand">
            <a-button size="small" @click="expandHandle">{{
              expandAll ? "全部收起" : "全部展开"
            }}</a-button>
          <div class="func">
            <span>name</span>
            <span>value</span>
          <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]);
				
架构树el-tree需要实现全部展开和全部收起功能，查阅资料借鉴别人的经验终于实现
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
<div class="expand">
            <el-button size="small" @click="expandHandle">{{
              expandAll ? "全部收起" : "全部展开"
				
// 折叠所有节点
setAllFold() {
  for (var i = 0; i < this.$refs.tree.store._getAllNodes().length; i++) {
    this.$refs.tree.store._getAllNodes()[i].expanded = false;
// 展开所有节点
setAllExpand() {
  for (var i = 0; i < this.$refs.tree.store._getAllNod.
				
要实现a-tree的展开和收起功能，可以通过修改样式和操作相关的DOM元素来实现。根据引用中提供的解决方法，可以通过添加以下CSS样式来实现点击title文字展开/收起的效果：
.ant-select-tree-switcher_open::before, .ant-select-tree-switcher_close::before {
    content: '';
    position: absolute;
    right: -200px;
    top: 0;
    left: 0;
    bottom: 0;
.ant-select-tree-switcher_close:hover ~ .ant-select-tree-node-content-wrapper-close {
    background-color: #e6f7ff;
    transition: background-color 0.3s ease;
.ant-select-tree-switcher_open:hover ~ .ant-select-tree-node-content-wrapper {
    background-color: #e6f7ff;
    transition: background-color 0.3s ease;
如果需要深度选择，可以在选择器前添加/deep/，如引用中所示。这样可以确保样式可以应用于深层级的元素。
此外，根据引用中提供的信息，可以使用this.$refs.tree.store来获取a-tree的实例，并操作其中的数据。expanded字段可以控制节点的展开和收起功能。
综上所述，您可以通过修改样式和操作this.$refs.tree.store的数据来实现a-tree的展开和收起功能。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
-  *1* *2* [ant design 树形控件a-tree-select展开子级选项只能点左侧小三角形，希望能点击title文字就能展开](https://blog.csdn.net/m0_54281425/article/details/128968297)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
-  *3* [a-tree 树的全部展开和收起](https://blog.csdn.net/weixin_42232156/article/details/125605891)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]