已注册AuthBloc仍触发GetIt未注册错误的技术求助

错误信息 #

Object/factory with  type AuthBloc is not registered inside GetIt. 
(Did you accidentally do GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance;
Did you forget to register it?)
'package:get_it/get_it_impl.dart':
get_it_impl.dart:1
Failed assertion: line 372 pos 7: 'instanceFactory != null'

已完成的注册配置 #

我已经通过injectable生成的代码注册了AuthBloc，相关代码如下：

extension GetItInjectableX on _i1.GetIt {
  // initializes the registration of main-scope dependencies inside of GetIt
  Future<_i1.GetIt> init({
    String? environment,
    _i2.EnvironmentFilter? environmentFilter,
  }) async {
    final gh = _i2.GetItHelper(
      this,
      environment,
      environmentFilter,
    );
    final firebaseInjectableModule = _$FirebaseInjectableModule();
    gh.lazySingleton<_i3.FirebaseAuth>(
        () => firebaseInjectableModule.firebaseAuth);
    gh.lazySingleton<_i4.FirebaseFirestore>(
        () => firebaseInjectableModule.firestore);
    gh.lazySingleton<_i5.IAuthCredentials>(() => _i6.FirebaseAuthenticator(
          gh<_i3.FirebaseAuth>(),
          gh<_i7.GoogleSignIn>(),
          gh<_i4.FirebaseFirestore>(),
        ));
    gh.factory<_i8.LoginFormBloc>(
        () => _i8.LoginFormBloc(gh<_i5.IAuthCredentials>()));
    await gh.factoryAsync<_i9.SharedPreferences>(
      () => firebaseInjectableModule.prefs,
      preResolve: true,
    );
    gh.factory<_i10.AuthBloc>(() => _i10.AuthBloc(gh<_i5.IAuthCredentials>()));
    return this;
  }
}

class _$FirebaseInjectableModule extends _i11.FirebaseInjectableModule {}

触发错误的调用代码 #

但在MyAppWidget中调用getIt<AuthBloc>()时仍触发上述错误：

class MyAppWidget extends StatelessWidget {
  const MyAppWidget({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MultiBlocProvider(
      providers: [
        BlocProvider(
          create: (context) =>
              getIt<AuthBloc>()..add(const AuthEvent.authCheckRequested()),
        ),
      ],
      child: MaterialApp.router(
        debugShowCheckedModeBanner: false,
        theme: ThemeData(
          primarySwatch: Colors.blue,
          textTheme: const TextTheme(
            displayLarge: TextStyle(fontSize: 16.0),
            displaySmall: TextStyle(fontSize: 15.0),
            displayMedium: TextStyle(fontSize: 15.0),
          ),
        ),
        routerConfig: AppRouter.router,
      ),
    );
  }
}

可能的解决方案 #

• 确保GetIt初始化完成：必须在调用getIt<AuthBloc>()前执行await getIt.init()完成依赖注册，比如在main函数中先初始化再启动App：

  void main() async {
    WidgetsFlutterBinding.ensureInitialized();
    await getIt.init();
    runApp(const MyAppWidget());
  }
  

• 检查环境匹配：如果使用了injectable的环境标识，确认当前运行环境和注册时的环境一致，否则对应实例不会被注册。
• 验证GetIt实例一致性：确保getIt是全局单例的GetIt.instance，避免错误写法GetIt sl = GetIt.instance();（多了括号会创建新实例）。
• 重新生成injectable代码：清理缓存后重新生成，执行flutter pub run build_runner clean，再运行flutter pub run build_runner build。
• 检查类型匹配：确认getIt<AuthBloc>()中的AuthBloc和注册代码里的_i10.AuthBloc是同一个类，避免导入错误的同名类。

内容的提问来源于stack exchange，提问作者Gbenga B Ayannuga