class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.handleClick = this.handleClick.bind(this);
  }

  handleClick() {
    // 处理点击事件
  }

  render() {
    return <button onClick={this.handleClick}>点击我</button>;
  }
}

class ParentComponent extends React.Component {
  handleCallback() {
    // 处理回调
  }

  render() {
    return <ChildComponent callback={this.handleCallback} />;
  }
}

class ChildComponent extends React.Component {
  render() {
    return <button onClick={this.props.callback}>点击我</button>;
  }
}