iosWebViewFix/example/lib/in_app_webiew_example.screen.dart

import 'package:flutter/material.dart';
import 'package:flutter_inappbrowser/flutter_inappbrowser.dart';

import 'main.dart';

class InAppWebViewExampleScreen extends StatefulWidget {
  @override
  _InAppWebViewExampleScreenState createState() =>
      new _InAppWebViewExampleScreenState();
}

class _InAppWebViewExampleScreenState extends State<InAppWebViewExampleScreen> {
  InAppWebViewController webView;
  String url = "";
  double progress = 0;

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
            title: Text("InAppWebView")
        ),
        drawer: myDrawer(context: context),
        body: Container(
          child: Column(children: <Widget>[
            Container(
              padding: EdgeInsets.all(20.0),
              child: Text(
                  "CURRENT URL\n${(url.length > 50) ? url.substring(0, 50) + "..." : url}"),
            ),
            Container(
                padding: EdgeInsets.all(10.0),
                child: progress < 1.0
                    ? LinearProgressIndicator(value: progress)
                    : Container()),
            Expanded(
              child: Container(
                margin: const EdgeInsets.all(10.0),
                decoration:
                    BoxDecoration(border: Border.all(color: Colors.blueAccent)),
                child: InAppWebView(
                  initialUrl: "https://flutter.dev/",
                  initialHeaders: {},
                  initialOptions: InAppWebViewWidgetOptions(
                    inAppWebViewOptions: InAppWebViewOptions(
                        debuggingEnabled: true,
                    )
                  ),
                  onWebViewCreated: (InAppWebViewController controller) {
                    webView = controller;
                  },
                  onLoadStart: (InAppWebViewController controller, String url) {
                    setState(() {
                      this.url = url;
                    });
                  },
                  onLoadStop: (InAppWebViewController controller, String url) async {
                    setState(() {
                      this.url = url;
                    });
                  },
                  onProgressChanged: (InAppWebViewController controller, int progress) {
                    setState(() {
                      this.progress = progress / 100;
                    });
                  },
                ),
              ),
            ),
            ButtonBar(
              alignment: MainAxisAlignment.center,
              children: <Widget>[
                RaisedButton(
                  child: Icon(Icons.arrow_back),
                  onPressed: () {
                    if (webView != null) {
                      webView.goBack();
                    }
                  },
                ),
                RaisedButton(
                  child: Icon(Icons.arrow_forward),
                  onPressed: () {
                    if (webView != null) {
                      webView.goForward();
                    }
                  },
                ),
                RaisedButton(
                  child: Icon(Icons.refresh),
                  onPressed: () {
                    if (webView != null) {
                      webView.reload();
                    }
                  },
                ),
              ],
            ),
        ]))
    );
  }
}