android - Flutter - 在 webview 上拉动刷新？

Question

您好，我只想问一下是否可以在 Flutter 中重新加载 WebView？我四处搜索，其中大多数都使用 FAB( float 操作按钮)来重新加载网站，但在 WebView 方面几乎没有，其中大部分用于 ListView。

有没有办法在 WebView 屏幕中执行此操作？

What I tried so far is: SwipeDetector package and Pull-to-refresh package both which doesn't work, pull to refresh almost works but it closes my app entirely (I've followed the documentation but it seems it works fine on listviews only)

我的代码是这样的，如果你想看的话:

class _HomePageState extends State<HomePage> {
  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
  WebViewController myController;
  final flutterWebviewPlugin = new WebView();

  _exitApp(BuildContext context, Future<WebViewController> controller) async {
    controller.then((data) async {
      WebViewController controller = data;
      var goBack = await controller.canGoBack();
      if (goBack == true) {
        print("onwill go back");
        controller.goBack();
      } else {
        print("onwill not go back");
        Navigator.pop(context);
      }
    });
  }

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

  void firebaseCloudMessagingListeners() {
    if (Platform.isIOS) iOSPermission();

    _firebaseMessaging.getToken().then((token) {
      print(token);
    });

    _firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        setState(() {
          print("${message['data']['url']}");
          Navigator.push(
              context,
              MaterialPageRoute(
                  builder: (BuildContext context) => NotificationClicked()));
        });
      },
      onResume: (Map<String, dynamic> message) async {
        print("${message['data']['url']}");
      },
      onLaunch: (Map<String, dynamic> message) async {
        print("${message['data']['url']}");
      },
    );
  }

  void iOSPermission() {
    _firebaseMessaging.requestNotificationPermissions(
        IosNotificationSettings(sound: true, badge: true, alert: true));
    _firebaseMessaging.onIosSettingsRegistered
        .listen((IosNotificationSettings settings) {
      print("Settings registered: $settings");
    });
  }

  Completer<WebViewController> _controller = Completer<WebViewController>();


  @override
  Widget build(BuildContext context) {
    return WillPopScope(
        onWillPop: () => _exitApp(context, _controller.future),
        child: SafeArea(
    child: Scaffold(
      body: WebView(
          initialUrl: 'https://syncshop.online/en/',
          javascriptMode: JavascriptMode.unrestricted,
          onWebViewCreated: (controller) {
            _controller.complete(controller);
          },
          onPageFinished: (controller) async {
            (await _controller.future).evaluateJavascript(
        "document.getElementsByClassName('footer-container')[0].style.display='none';");
            (await _controller.future).evaluateJavascript(
        "document.getElementById('st_notification_1').style.display='none';");
            (await _controller.future).evaluateJavascript(
        "document.getElementById('sidebar_box').style.display='none';");
          },
        ),
      floatingActionButton: FutureBuilder<WebViewController>(
        future: _controller.future,
        builder: (BuildContext context,
            AsyncSnapshot<WebViewController> controller) {
          if (controller.hasData) {
            return FloatingActionButton(
              onPressed: () {
                controller.data.reload();
              },
              child: Icon(Icons.refresh),
            );
          }
          return Container();
        },
      ),
    ),
        ),
      );
  }
}

Answer 1

也许你可以尝试使用 RefreshIndicator，我个人还没有在 WebView 中尝试过，但希望它能起作用。

return Scaffold(
  body: RefreshIndicator(
    onRefresh: () => _controller.reload(),
    child: Webview(),
  ),
),