CODEWITHSUNDEEP
flutterroutesloadinginitnavigator
Chlamy
Chlamy

Reputation: 37

Create a loading page on Flutter

I have this main dart file

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key key}) : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  void initState() {
    super.initState();
    MainController().init().then((value) {
      if(Version().canUpdate()) {
        Navigator.pushReplacementNamed(context, '/update');
      }
      MainController().getAccountInfos((datas) {
        if(datas["auth"]) {
          Navigator.pushReplacementNamed(context, '/');
        }
        else {
          Navigator.pushReplacementNamed(context, '/login');
        }
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: new ThemeData(
          scaffoldBackgroundColor: ColorPalette.primary
      ),
      initialRoute: "/loading",
      routes: {
        '/': (context) => MainMenuWidget(),
        '/login': (context) => LoginWidget(),
        '/register': (context) => RegisterWidget(),
        '/keys': (context) => KeysPageWidget(),
        '/update': (context) => UpdatePageWidget(),
        '/loading': (context) => LoadingPageWidget(),
      },
    );
  }
}

and I try to display a loading view during app init before change page.

Actually, I have a "Navigator operation requested with a context that does not include a Navigator." error.

I need help please.

Upvotes: 0

Views: 262

Answers (1)

mkobuolys
mkobuolys

Reputation: 5333

You are using the Navigator logic inside _MyAppState, initState() method - here, your context does not have a defined Navigator, that's basically what the error explains. Navigator context could be accessed only under the MaterialApp() (since you define your routes, navigation logic only there).

You can resolve this by moving all the initState() logic to the LoadingPageWidget - there you could access the Navigator and since it's your default first page, there should be no side effects behind this solution.

Upvotes: 1

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