问题描述
我试图在注销后导航到登录屏幕。注销后,屏幕可以导航,但会引发错误:
Looking up a deactivated widget's ancestor is unsafe.
At this point the state of the widget's element tree is no longer stable.
To safely refer to a widget's ancestor in its dispose() method,save a reference to the ancestor by calling dependOnInheritedWidgetofExactType() in the widget's didChangeDependencies() method.
BlocListener<LoginCubit,LoginState>(
listenWhen: (prevIoUs,current) => current is logoutSuccess,listener: (context,state) {
Navigator.of(context).pushNamedAndRemoveUntil(
RouteList.initial,(route) => false,);
},child: NavigationListItem(
title: TranslationConstants.logout.t(context),onpressed: () {
BlocProvider.of<LoginCubit>(context).logout();
}),),
class LoginCubit extends Cubit<LoginState> {
final LoginUser loginUser;
final logoutUser logoutUser;
final LoadingCubit loadingCubit;
LoginCubit({required this.loadingCubit,required this.loginUser,required this.logoutUser}) :
super(LoginInitial());
void initiateLogin(String username,String password) async {
loadingCubit.show();
final Either<AppError,bool> eitherResponse = await loginUser(
LoginRequestParams(
userName: username,password: password,);
emit(eitherResponse.fold(
(l) {
var message = getErrorMessage(l.appErrorType);
print(message);
return LoginError(message);
},(r) => LoginSuccess(),));
loadingCubit.hide();
}
void logout() async {
await logoutUser(noparams());
emit(logoutSuccess());
}
它正在处理 Navigator.of(context).pushNamed('routName'),但我无法使用它,因为没有登录就导航回主屏幕。
解决方法
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