---
order: 1
title: 受控操作示例
---

受控操作示例

````jsx
import { Tree } from 'antd';
const TreeNode = Tree.TreeNode;

const x = 3;
const y = 2;
const z = 1;
const gData = [];

const generateData = (_level, _preKey, _tns) => {
  const preKey = _preKey || '0';
  const tns = _tns || gData;

  const children = [];
  for (let i = 0; i < x; i++) {
    const key = `${preKey}-${i}`;
    tns.push({ title: key, key });
    if (i < y) {
      children.push(key);
    }
  }
  if (_level < 0) {
    return tns;
  }
  const level = _level - 1;
  children.forEach((key, index) => {
    tns[index].children = [];
    return generateData(level, key, tns[index].children);
  });
};
generateData(z);

const Demo = React.createClass({
  getDefaultProps() {
    return {
      multiple: true,
    };
  },
  getInitialState() {
    return {
      expandedKeys: ['0-0-0', '0-0-1'],
      autoExpandParent: true,
      checkedKeys: ['0-0-0'],
      selectedKeys: [],
    };
  },
  onExpand(expandedKeys) {
    console.log('onExpand', arguments);
    // if not set autoExpandParent to false, if children expanded, parent can not collapse.
    // or, you can remove all expanded chilren keys.
    this.setState({
      expandedKeys,
      autoExpandParent: false,
    });
  },
  onCheck(checkedKeys) {
    this.setState({
      checkedKeys,
      selectedKeys: ['0-3', '0-4'],
    });
  },
  onSelect(selectedKeys, info) {
    console.log('onSelect', info);
    this.setState({ selectedKeys });
  },
  render() {
    const loop = data => data.map((item) => {
      if (item.children) {
        return (
          <TreeNode key={item.key} title={item.key} disableCheckbox={item.key === '0-0-0'}>
            {loop(item.children)}
          </TreeNode>
        );
      }
      return <TreeNode key={item.key} title={item.key} />;
    });
    return (
      <Tree checkable multiple={this.props.multiple}
        onExpand={this.onExpand} expandedKeys={this.state.expandedKeys}
        autoExpandParent={this.state.autoExpandParent}
        onCheck={this.onCheck} checkedKeys={this.state.checkedKeys}
        onSelect={this.onSelect} selectedKeys={this.state.selectedKeys}
      >
        {loop(gData)}
      </Tree>
    );
  },
});

ReactDOM.render(<Demo />, mountNode);
````