class MyComponent extends React.Component {
  iframeRef = React.createRef();

  // 其他代码...
}

class MyComponent extends React.Component {
  iframeRef = React.createRef();

  componentDidMount() {
    console.log(this.iframeRef.current.name); // 访问iframe的name属性
  }

  render() {
    return (
      <div>
        <iframe ref={this.iframeRef} name="myFrame" src="..." />
      </div>
    );
  }
}