Flutter 如何将共享偏好与可注射性一起使用，并在颤振中获得它？

我使用可注射的，并得到它在颤振包 我有一个共同的偏好类：

@LazySingleton()
class SharedPref {
  final String _token = 'token';
  SharedPreferences _pref;

  SharedPref(this._pref);

  Future<String> getToken() async {
    return _pref.getString(_token) ?? '';
  }

  Future<void> setToken(String token) async {
    await _pref.setString(_token, token);
  }
}

---

如何将共享首选项用于可注射？？？

我可以通过将

runApp（）

包装为

GetIt.I.isReady（）

来解决它

void main（）{
WidgetsFlutterBinding.ensureInitialized（）；
GetIt.I.isReady（）然后（）{
runApp（MyApp（））；
});
}

当我使用

@preResolve

共享参考时，它对我起作用了

@module
abstract class InjectableModule{

@preResolve
Future<SharedPreferences> get prefs => SharedPreferences.getInstance();
}

@injectable
class LoginCheckBloc extends Bloc<LoginCheckEvent, LoginCheckState> {
  final SharedPref sharedPref;

  LoginCheckBloc({@required this.sharedPref}) : super(const LoginCheckState.initial());

  @override
  Stream<LoginCheckState> mapEventToState(
    LoginCheckEvent event,
  ) async* {
    if (event is CheckLogin) {
      final String token = await sharedPref.getToken();
      if (token.isEmpty){
        yield const LoginCheckState.notLogin();
      }else{
        yield const LoginCheckState.successLogin();
      }
    }
  }
}

BlocProvider<LoginCheckBloc>(
          create: (BuildContext context) => getIt<LoginCheckBloc>()..add(CheckLogin()),
        ),

You tried to access an instance of SharedPreferences that was not ready yet
'package:get_it/get_it_impl.dart':
Failed assertion: line 272 pos 14: 'instanceFactory.isReady'

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  
  GetIt.I.isReady<SharedPreferences>().then((_) {
    runApp(MyApp());
  });
}

@module
abstract class InjectableModule{

@preResolve
Future<SharedPreferences> get prefs => SharedPreferences.getInstance();
}

final GetIt getIt = GetIt.instance;

@injectableInit
Future<void> configureInjection(String env) async {
await $initGetIt(getIt, environment: env);
}

void main() async {
WidgetsFlutterBinding.ensureInitialized();
await configureInjection(Environment.prod);
runApp(MyApp());
}