如何在flutter中将数据从父页面传递到webview页面？

String data = 'Hello World';

Navigator.push(
  context,
  MaterialPageRoute(
    builder: (context) => WebViewPage(data: data),
  ),
);

class WebViewPage extends StatelessWidget {
  final String data;

  WebViewPage({required this.data});

  @override
  Widget build(BuildContext context) {
    return WebView(
      initialUrl: 'https://www.example.com',
      javascriptMode: JavascriptMode.unrestricted,
      onPageFinished: (String url) {
        // 在WebView加载完成后，将数据传递给WebView页面
        controller.evaluateJavascript('setData("$data")');
      },
    );
  }
}