小编IMS*_*Dev的帖子

我正在使用 Bloc 模式开发 Flutter 应用程序。认证成功后，UserSate就有了User对象。在所有其他 Bloc 中，我需要访问 UserState 中的 User 对象。我尝试在其他 Bloc 的构造函数参数上获取 UserBloc 并访问 User 对象。但它显示 User 对象为 null。有人有更好的解决方案吗？

class SectorHomeBloc extends Bloc<SectorHomeEvent, SectorHomeState> {
  final OutletRepository outletRepository;
  UserBloc userBloc;
  final ProductRepository productRepository;
  final ProductSubCategoryRepository productSubCategoryRepository;
  final PromotionRepository promotionRepository;
  final ProductMainCategoryRepository mainCategoryRepository;

  SectorHomeBloc({
    @required this.outletRepository,
    @required this.userBloc,
    @required this.productSubCategoryRepository,
    @required this.productRepository,
    @required this.promotionRepository,
    @required this.mainCategoryRepository,
  });
  @override
  SectorHomeState get initialState => SectorHomeLoadingState();

  @override
  Stream<SectorHomeState> mapEventToState(SectorHomeEvent event) async* {
    try {
      print(userBloc.state.toString());
      LatLng _location = LatLng(
          userBloc.state.user.defaultLocation.coordinate.latitude,
          userBloc.state.user.defaultLocation.coordinate.longitude);
      String _token …