<button onClick={handleClick}>按钮</button>

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

  handleClick() {
    // 处理点击事件的逻辑
  }

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

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      count: 0
    };
    this.handleClick = this.handleClick.bind(this);
  }

  handleClick() {
    this.setState(prevState => ({
      count: prevState.count + 1
    }));
  }

  render() {
    return (
      <div>
        <p>点击次数：{this.state.count}</p>
        <button onClick={this.handleClick}>按钮</button>
      </div>
    );
  }
}