Flutter bloc 事件沒有被調用

Question

事件在按鈕 onPressed 上被調用

BlocProvider.of<ProfileBloc>(context).add(FetchProfile());

我對集團狀態管理很陌生，請幫我解決這個問題。 版本flutter_bloc: ^8.0.1 ，如果可能的話，就想試試新版本。

class ProfileBloc extends Bloc<ProfileEvent, ProfileState> {
  AuthRepo authRepo;
  @override
  ProfileBloc(ProfileState initialState, {required this.authRepo})
      : super(ProfileLoading()) {
    on<FetchProfile>((event, emit) async {
      return await fetchProfileEvent(event, emit);
    });
  }

  Future<void> fetchProfileEvent(
      FetchProfile event, Emitter<ProfileState> emit) async {
    log("$event", name: "eventToState");

    emit(ProfileLoading());
    try {
      await authRepo.getProfileCall().then(
        (value) {
          log("$value", name: 'FetchProfile');
          if (value != 'failed') {
            emit(ProfileLoaded(userData: userProfileModelFromJson(value)));
          } else {
            emit(ProfileLoaded(userData: null));
          }
        },
      );
    } catch (e) {
      log("$e", name: "ProfileBloc : FetchProfile");
      emit(ProfileError());
    }
  }
} 




  

Answer 1

試試這樣：

class ProfileBloc extends Bloc<ProfileEvent, ProfileState> {
  AuthRepo authRepo;
  @override
  ProfileBloc({required this.authRepo})
      : super(ProfileLoading()) {
    on<FetchProfile>(fetchProfileEvent);
  }

  Future<void> fetchProfileEvent(
      FetchProfile event, Emitter<ProfileState> emit) async {
    log("$event", name: "eventToState");

    emit(ProfileLoading());
    try {
      final value = await authRepo.getProfileCall();
      log("$value", name: 'FetchProfile');
      if (value != 'failed') {
        emit(ProfileLoaded(userData: userProfileModelFromJson(value)));
      } else {
        emit(ProfileLoaded(userData: null));
      }
    } catch (e) {
      log("$e", name: "ProfileBloc : FetchProfile");
      emit(ProfileError());
    }
  }
}