flutter_integrated_whb/lib/pages/mine/webViewPage.dart

import 'package:flutter/material.dart';
import 'package:qhd_prevention/pages/my_appbar.dart';
import 'package:webview_flutter/webview_flutter.dart';


class WebViewPage extends StatefulWidget {
  final String url;
  final String name;

  const WebViewPage({Key? key, required this.url, required this.name,}) : super(key: key);

  @override
  State<WebViewPage> createState() => _WebViewPageState(name);


}

class _WebViewPageState extends State<WebViewPage> {
  late final WebViewController _controller;
  final String name;
  ValueNotifier<double> loadingProgress = ValueNotifier(0.0);
  ValueNotifier<bool> isLoading = ValueNotifier(true);

  _WebViewPageState(this.name);

  @override
  void initState() {
    super.initState();
    _controller = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setNavigationDelegate(NavigationDelegate(
        onProgress: (progress) {
          loadingProgress.value = progress / 100;
          if (progress == 100) isLoading.value = false;
        },
        onPageStarted: (url) => isLoading.value = true,
        onPageFinished: (url) => isLoading.value = false,
      ))
      ..loadRequest(Uri.parse(widget.url));
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        MyAppbar(title: name,onBackPressed: () async {
          if (await _controller.canGoBack()) {
          _controller.goBack();
          } else{
            Navigator.of(context).pop();
          }
        },),
        Expanded( child: WebViewWidget(controller: _controller),),
        // ValueListenableBuilder<bool>(
        //   valueListenable: isLoading,
        //   builder: (context, loading, _) {
        //     return loading
        //         ? const Center(child: CircularProgressIndicator())
        //         : const SizedBox();
        //   },
        // ),
      ],

    );

  }
}