reactjs链接onClick设置属性在子级中未定义

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

  handleClick() {
    // 处理点击事件的代码
  }

  render() {
    return (
      <ChildComponent onClick={this.handleClick} />
    );
  }
}

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

class ParentComponent extends React.Component {
  handleClick = () => {
    // 处理点击事件的代码
  }

  render() {
    return (
      <ChildComponent onClick={this.handleClick} />
    );
  }
}

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