Question

我有以下代码，可以在Android上完美运行。但是在iOS上，它似乎不像Android那样对在线/离线做出反应。我已经在代码中修改了网址：

class HomePage extends StatefulWidget {
  _State createState() => _State();
}

class _State extends State<HomePage> {
  FlutterWebviewPlugin fwp;
  final String initialUrl = 'https://example.com/link/';

  @override
  void initState() {
    super.initState();
    fwp = FlutterWebviewPlugin();
    fwp.onStateChanged.listen(onStateChange);
  }

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

  void onStateChange(WebViewStateChanged state) {
    List<String> doNotSave = <String>[
      initialUrl,
    ];
    var uri = Uri.parse(state.url);
    if (state.type == WebViewState.finishLoad && !doNotSave.contains(state.url) && (uri.queryParameters["link"] == "true")) {
      storage.setString('url', state.url);
      print("Saved!");
    }
  }

  Widget build(BuildContext context) {
    // Uncomment to reset URL
    // storage.setString('url', '');
    String savedUrl = storage.getString('url') ?? '';
    String urlToLoad = savedUrl != '' ? savedUrl : initialUrl;


    return new Scaffold(
      body: OfflineBuilder(
        connectivityBuilder: (
            BuildContext context,
            ConnectivityResult connectivity,
            Widget child,
            ) {

          final bool connected = connectivity != ConnectivityResult.none;

          if (connected == true) { // Show link-page or URL from database
            fwp.reloadUrl(urlToLoad);
          }
          else { // Offline 404
            fwp.reloadUrl(Uri.dataFromString('<html><body>404</body></html>', mimeType: 'text/html').toString());
          }
          // Loading dots
          return WebviewScaffold(
            url: Uri.dataFromString('<html><body>Loading...</body></html>', mimeType: 'text/html').toString(),
            withJavascript: true,
            useWideViewPort: false,
            withZoom: false,
            scrollBar: false
          );

        },
        child: Column(
        ),
      ),
    );

  }
}

您可能会看到该应用已启动，并且显示了Loading...，如果该应用在线，则应显示urlToLoad，如果在线，则显示一个带有{{1}的页面}。并且如果连接状态随时更改，它应该做出反应。为什么这在iOS上不起作用？它只显示了404部分，而没有其他内容。

Flutter应用程序（webview）在Android上运行良好，但在iOS上运行不正常？

0 个答案: