flutter - The superclass 'Bloc<Event, State>' doesn't have a zero argument constructor

Question

1. If I create a constructor to call super, I have to pass an argument to the BlocProvider's create property too. I don't know how to handle this.

   CounterBloc(CounterState initialState) : super(initialState);

2. If the below code is necessary for the bloc?

   @override CounterState get initialState => ShowCounterState(counterValue);

Appreciate your help in advance.

Answer 1

You shouldn't override initialState. If you'd like to specify the initial state in your Bloc class while having a zero-argument constructor, constructor, then do something like this:

CounterBloc() : super(ShowCounterState(0));

Alternatively, use the constructor in your point #1, and pass the value when instantiating the Bloc, like so:

final yourBloc = CounterBloc(ShowCounterState(0));