在 dart 中动态访问属性

Question

我使用 bloc 模式创建了一个 Flutter 应用程序。我有一个名为 AuthCredentials 的类来存储授权所需的所有凭据。当前的应用程序状态称为 SignUpOTPState 但我想访问 AuthNavConfirmRegisterPhone 并获取电话号码。如何动态访问变量和函数？

-AuthNavState-

abstract class AuthNavState extends Equatable {
final String route;
const AuthNavState(this.route);
}

class AuthNavLogin extends AuthNavState {
AuthNavLogin() : super("/login");

@override
List<Object> get props => [];
}

class AuthNavRegister extends AuthNavState {
AuthNavRegister() : super("/register");

@override
List<Object> get props => [];
}

class AuthNavConfirmRegisterPhone extends AuthNavState {
final User user;
AuthNavConfirmRegisterPhone(this.user) : super("/register/confirm/otp");

@override
List<Object> get props => [];
}

-SignUpOTPState-

class SignUpOTPState{
final String otp;
bool get isValidOTP =>otp.length==6;

final FormSubmissionStatus formStatus;

SignUpOTPState({
  this.otp ='',
  this.formStatus = const InitialFormStatus(),
});

SignUpOTPState copyWith({
  String? otp,
  FormSubmissionStatus? formStatus,
}){
   return SignUpOTPState(
   otp: otp ?? this.otp,
   formStatus: formStatus ?? this.formStatus,
 );
 }

 }

-SignUpOTPBloc-

class SignUpOTPBloc extends Bloc<SignUpOTPEvent,SignUpOTPState>{
final AuthRepository authRepo;
final AuthNavCubit authNavCubit;
// final AuthPayload authPayload;

SignUpOTPBloc({required this.authRepo,required this.authNavCubit}) : super(SignUpOTPState());

 @override
 Stream<SignUpOTPState> mapEventToState(SignUpOTPEvent event) async* {
   if(event is SignUpOTPChanged){
      yield state.copyWith(otp:event.otp);
    }
    else if(event is SignUpOTPSubmitted){
      print("submitteddddd");
      yield state.copyWith(formStatus:FormSubmitting());
     try{

       //THE LINE I GET THE ERROR
       final AuthPayload authPayload=await authRepo.confirmSignUp(AuthOTPCredentials(phone: 
(authNavCubit.state is AuthNavConfirmRegisterPhone)?authNavCubit.state.user.phone:"not in the 
 state ", otp:state.otp));
     print("Authpayloadddd(): $authPayload");
     yield state.copyWith(formStatus: SubmissionSuccess());
     authNavCubit.showEmailVerification(authPayload);

     // final credentials=authNavCubit.credentials;
     // credentials.userId=userId;

     // authNavCubit.launchSession(credentials);
   }on Exception catch(e){
     print("--------------ERROR--------------");
     yield state.copyWith(formStatus: SubmissionFailed(e));
   }
 }
 }
 }