如何在Reactjs中从外部调用主组件内部的方法

import React, { Component } from 'react';

class MainComponent extends Component {
  handleClick() {
    // 处理点击事件的逻辑
  }

  render() {
    return (
      <div>
        {/* 主组件的内容 */}
      </div>
    );
  }
}

export default MainComponent;

import React, { Component } from 'react';
import ChildComponent from './ChildComponent';

class MainComponent extends Component {
  handleClick() {
    // 处理点击事件的逻辑
  }

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

export default MainComponent;

import React, { Component } from 'react';

class ChildComponent extends Component {
  render() {
    return (
      <div>
        <button onClick={this.props.handleClick}>调用主组件方法</button>
      </div>
    );
  }
}

export default ChildComponent;