Undefined name state for flutter bloc-CodePudding

Im trying to use the flutter_bloc v8 for a counter app but I can't access the value of the state to update it. Its telling me state is undefined. I know we can simplify it by using Cubit but I want to see how it'll work with normal bloc.

counter_state.dart

abstract class CounterState {}

class CounterValue extends CounterState {
  int value;
  CounterValue(this.value);
}

class CounterLoading extends CounterState {}

counter_bloc.dart

class CounterBloc extends Bloc<CounterEvent, CounterState> {
  CounterBloc() : super(CounterValue(0)) {
    on<IncrementEvent>((event, emit) => _increment(emit));
    on<DecrementEvent>((event, emit) => _decrement(emit));
  }
}

void _increment(Emitter<CounterState> emit) {
  emit(CounterValue(state.value   1));
}

void _decrement(Emitter<CounterState> emit) {
  emit(CounterValue(state.value   1));
}

CodePudding user response：

the state is unreachable because you have defined your functions outside of CounterBloc.

try this:

class CounterBloc extends Bloc<CounterEvent, CounterState> {
  CounterBloc() : super(CounterValue(0)) {
    on<IncrementEvent>((event, emit) => _increment(emit));
    on<DecrementEvent>((event, emit) => _decrement(emit));
  }

  void _increment(Emitter<CounterState> emit) {
    emit(CounterValue(state.value   1));
  }

  void _decrement(Emitter<CounterState> emit) {
    emit(CounterValue(state.value   1));
  }
}