ant-design-vue/antdv-demo/docs/tree/demo/basic-controlled.md

#### 受控操作示例 受控操作示例 #### Controlled Tree Controlled mode lets parent nodes reflect the status of child nodes more intelligently.

<template>
  <a-tree
    v-model="checkedKeys"
    checkable
    :expanded-keys="expandedKeys"
    :auto-expand-parent="autoExpandParent"
    :selected-keys="selectedKeys"
    :tree-data="treeData"
    @expand="onExpand"
    @select="onSelect"
  />
</template>
<script>
const treeData = [
  {
    title: '0-0',
    key: '0-0',
    children: [
      {
        title: '0-0-0',
        key: '0-0-0',
        children: [
          { title: '0-0-0-0', key: '0-0-0-0' },
          { title: '0-0-0-1', key: '0-0-0-1' },
          { title: '0-0-0-2', key: '0-0-0-2' },
        ],
      },
      {
        title: '0-0-1',
        key: '0-0-1',
        children: [
          { title: '0-0-1-0', key: '0-0-1-0' },
          { title: '0-0-1-1', key: '0-0-1-1' },
          { title: '0-0-1-2', key: '0-0-1-2' },
        ],
      },
      {
        title: '0-0-2',
        key: '0-0-2',
      },
    ],
  },
  {
    title: '0-1',
    key: '0-1',
    children: [
      { title: '0-1-0-0', key: '0-1-0-0' },
      { title: '0-1-0-1', key: '0-1-0-1' },
      { title: '0-1-0-2', key: '0-1-0-2' },
    ],
  },
  {
    title: '0-2',
    key: '0-2',
  },
];

export default {
  data() {
    return {
      expandedKeys: ['0-0-0', '0-0-1'],
      autoExpandParent: true,
      checkedKeys: ['0-0-0'],
      selectedKeys: [],
      treeData,
    };
  },
  watch: {
    checkedKeys(val) {
      console.log('onCheck', val);
    },
  },
  methods: {
    onExpand(expandedKeys) {
      console.log('onExpand', expandedKeys);
      // if not set autoExpandParent to false, if children expanded, parent can not collapse.
      // or, you can remove all expanded children keys.
      this.expandedKeys = expandedKeys;
      this.autoExpandParent = false;
    },
    onCheck(checkedKeys) {
      console.log('onCheck', checkedKeys);
      this.checkedKeys = checkedKeys;
    },
    onSelect(selectedKeys, info) {
      console.log('onSelect', info);
      this.selectedKeys = selectedKeys;
    },
  },
};
</script>