Get Instances
Once you have declared some modules and you have started Koin, how can you retrieve your instances in your Flutter widgets or Services.
Widgets & Service as KoinComponents
The Flutter widgets are extended with the KoinComponents extension. You gain access to:
inject()- lazy evaluated instance from Koin containerget()- eager fetch instance from Koin container
For a module that declares a 'presenter' component:
final flutterModule = module()
// a factory of CounterBloc
..factory((s) => CounterBloc());
We can declare a property as lazy injected or we can just directly get an instance:
class MyPage extends StatefulWidget {
@override
_MyPageState createState() => _MyPageState();
}
class _MyPageState extends State<MyPage> {
CounterBloc counter;
Lazy<CounterBloc> lazyCounter;
@override
void initState() {
// Retrieve a Presenter instance
counter = get<CounterBloc>();
// Lazy injected Presenter instance
lazyCounter = inject<CounterBloc>();
super.initState();
}
@override
Widget build(BuildContext context) {
return Container();
}
}