<cn>
#### 受控操作示例
受控操作示例
</cn>

<us>
#### basic controlled example
basic controlled example
</us>

```tpl
<template>
  <a-tree
    checkable
    @expand="onExpand"
    :expandedKeys="expandedKeys"
    :autoExpandParent="autoExpandParent"
    v-model="checkedKeys"
    @select="onSelect"
    :selectedKeys="selectedKeys"
    :treeData="treeData"
  />
</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>
```