CODEWITHSUNDEEP
flutternavigationbloc
iko
iko

Reputation: 77

Is Bloc pattern appropriate to manage navigation in a Flutter app?

I'm asking if bloc_flutter (Bloc pattern implementation for flutter), is the right solution to manage the app "navigation".

I used bloc_flutter to manage firebase login https://github.com/felangel/bloc/tree/master/examples/flutter_firebase_login.

After user successfully loggedin, he lands in a "welcome screen" with menu. I tried to manage screen navigation of this menu, using a new bloc pattern but it seems an overwhelming solution to me. Moreover, using navigation with bloc pattern doesn't let you use Android "back button".

So, would be better, in your opinion, using navigation of routes and let bloc manages the logic of each screen?

Upvotes: 1

Views: 471

Answers (2)

Ali Alizadeh
Ali Alizadeh

Reputation: 705

No, it's not. If you want your application to have a good architecture, you should not use bloc in order to handle navigation since navigation is not something related to the application's business logic, it's a part of the UI.

Upvotes: 1

Andrey Gordeev
Andrey Gordeev

Reputation: 32529

I pass GlobalKey<NavigatorState> to bloc and can perform navigation from there:

  @override
  Stream<MyScreenState> mapEventToState(
    MyScreenEvent event,
  ) async* {
    if (event is SomeEvent) {
      _navigatorKey.currentState.push(...);
    }
  }

Note that this key needs to be used on MaterialApp instantiation to get things working:

MaterialApp(
  navigatorKey: _navigatorKey,
  ...
);

Upvotes: 0

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