Flutter: Access data from InheritedWidgets without context?


Flutter: Access data from InheritedWidgets without context?
I see that I can access InheritedWidgets inside the build()
method like this: final inheritedWidget = ChronoApp.of(context);
but what if I want to access it somewhere else, say in initState()
which has no context. How would I do this?
build()
final inheritedWidget = ChronoApp.of(context);
initState()
2 Answers
2
According to this docs context
should be available in initState
using the context
getter.
context
initState
context
https://docs.flutter.io/flutter/widgets/State/context.html
The framework associates State objects with a BuildContext after creating them with StatefulWidget.createState and before calling initState.
What I found to work for me is getting the parent context and using it in the didChangeDependencies()
function that is called after initState. Like this
didChangeDependencies()
@override
// TODO: implement context
BuildContext get context => super.context;
@override
void didChangeDependencies()
bloc = LoginBlocProvider.of(context);
bloc.isAuthenticated.listen((bool value)
setState(()
isLoading = false;
);
if (value)
Navigator.push(context, MaterialPageRoute(
builder: (BuildContext context) => HomeScreen()
));
);
super.didChangeDependencies();
From de didChangeDependencies() docs:
This method is also called immediately after initState. It is safe to
call BuildContext.inheritFromWidgetOfExactType from this method.
I'm still trying to fully understand this feature but this is what worked for me
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Yes, that's what I meant. I think I used this myself somewhere, but I'm not sure.
– Günter Zöchbauer
Apr 22 at 16:40