扑动firebase用户登录app开始

Question

在启动画面中，我想检查是否有经过身份验证的用户导航到主页，如果没有，请转到注册/登录页面这里是启动屏幕的代码，方法启动并检查是否有用户插入然后导航到如果有用户进入，那就回家了

class _SplashScreenState extends State<SplashScreen> {
final FirebaseAuth _auth = FirebaseAuth.instance;
FirebaseUser _user;
Future<FirebaseUser> _getUser() async {
_user = await _auth.currentUser();
return _user;
}

Future startTime() async {
var _duration = new Duration(seconds: 2);
return new Timer(_duration, navigationPage());
}

navigationPage() {
  if (_user != null) {
   Navigator.of(context).pushNamed('/home');
  } else {
   Navigator.of(context).pushNamed('/welcome');
  }
}

@override
 void initState() {
 super.initState();
 _getUser();
 startTime();
 }

@override
Widget build(BuildContext context) {
  return new Scaffold(
    body: new Center(
      child: new Image.asset(
      'assets/imgs/logo.png',
        width: 162.0,
      height: 58.0,
     ),
    ),
  );
 }
}

Answer 1

我通过在'startTime'函数中获取_user来解决它，并且它有效

Future startTime() async {
_user = await _auth.currentUser();
var _duration = new Duration(seconds: 2);
return new Timer(_duration, navigationPage());
}