使用React.Children从外部调用内部组件方法

// 父组件
import React from 'react';
import ChildComponent from './ChildComponent';

class ParentComponent extends React.Component {
  handleClick() {
    console.log('调用了子组件的方法');
  }

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

// 子组件
import React from 'react';

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

export default ChildComponent;