在react js中将数据从子组件发送到父组件

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

class ParentComponent extends Component {
  handleData = (data) => {
    // 在这里处理接收到的数据
    console.log(data);
  }

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

export default ParentComponent;

import React, { Component } from 'react';

class ChildComponent extends Component {
  sendData = () => {
    const data = '这是子组件发送的数据';
    this.props.handleData(data);
  }

  render() {
    return (
      <div>
        <button onClick={this.sendData}>发送数据到父组件</button>
      </div>
    );
  }
}

export default ChildComponent;