如果用户未明确退出应用,我正在尝试自动登录。我正在使用Firebase进行身份验证,并使用pub的提供程序包来监视auth状态的更改。
我有一个服务dart文件(最初来自TheNetNinja教程),该文件公开了一个流,并用流提供程序包装了main.dart文件。
class FoodMart extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return StreamProvider(
create: (_) => AuthService().user,
child: MaterialApp(
title: 'Flutter Demo',
onGenerateRoute: Router.generateRoute,
home: Landing(),
),
);
}
}
我已关闭并重新打开该应用程序,但仍未重定向到主页。我做错了吗?当我热重载时,我将被重定向到主页,但只有那时。 这是AuthService.dart类的实现:
import 'dart:async';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:food_mart/models/users.dart';
import 'package:food_mart/services/database.dart';
class AuthService {
FirebaseAuth _mAuth = FirebaseAuth.instance;
Stream<User> get user {
return _mAuth.onAuthStateChanged.map(_mapUserFromFirebase);
}
User _mapUserFromFirebase(FirebaseUser firebaseUser) {
return firebaseUser != null ? User(userId: firebaseUser.uid) : null;
}
Future createUser(String email, String pwd, String role) async{
try {
AuthResult result = await _mAuth.createUserWithEmailAndPassword(email: email, password: pwd);
FirebaseUser firebaseUser = result.user;
await DatabaseService(userId: firebaseUser.uid).setUserData(email: email, role: role);
return _mapUserFromFirebase(firebaseUser);
} catch(e){
print(e.toString());
return e;
}
}
Future loginUser(String email, String pwd) async{
try {
AuthResult authResult = await _mAuth.signInWithEmailAndPassword(email: email, password: pwd);
FirebaseUser firebaseUser = authResult.user;
return _mapUserFromFirebase(firebaseUser);
} catch(e){
print(e.toString());
return null;
}
}
Future signOut() async {
try {
return await _mAuth.signOut();
} catch(e){
print(e.toString());
return null;
}
}
}
为简洁起见,省略了用户模型。请帮忙 :) 预先谢谢你!