React:将文件对象共享到父组件

import React from 'react';

class FileUploader extends React.Component {
  handleFileChange = (event) => {
    const file = event.target.files[0];
    this.props.onFileUpload(file);
  }

  render() {
    return (
      <div>
        <input type="file" onChange={this.handleFileChange} />
      </div>
    );
  }
}

export default FileUploader;

import React from 'react';
import FileUploader from './FileUploader';

class ParentComponent extends React.Component {
  handleFileUpload = (file) => {
    // 处理文件上传逻辑
    console.log('上传的文件:', file);
  }

  render() {
    return (
      <div>
        <h1>父组件</h1>
        <FileUploader onFileUpload={this.handleFileUpload} />
      </div>
    );
  }
}

export default ParentComponent;