import React from 'react';

class ParentComponent extends React.Component {
  handleClick() {
    console.log('父组件的函数被调用');
  }

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

export default ParentComponent;

import React from 'react';

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

export default ChildComponent;