在onPressed操作期间未在Flutter登录表单中找到路由

如何解决在onPressed操作期间未在Flutter登录表单中找到路由

我使用名为ChatPage.id的Routes创建了一个注册表单和登录表单，并使用pushNamed函数更改了屏幕，但是在按操作时，用户是在Firebase上创建的，但是我没有进行屏幕更改，并且生成的错误是：>

I/flutter (14603): Could not find a generator for route RouteSettings("/chatpage",null) in the _WidgetsAppState.
I/flutter (14603): Generators for routes are searched for in the following order:
I/flutter (14603):  1. For the "/" route,the "home" property,if non-null,is used.
I/flutter (14603):  2. Otherwise,the "routes" table is used,if it has an entry for the route.
I/flutter (14603):  3. Otherwise,onGenerateRoute is called. It should return a non-null value for any valid route not handled by "home" and "routes".
I/flutter (14603):  4. Finally if all else fails onUnknownRoute is called.
I/flutter (14603): Unfortunately,onUnknownRoute was not set.

这是我的代码：

class RegistrationScreen extends StatefulWidget {
  static const String id = 'registration_screen';

  @override
  _RegistrationScreenState createState() => _RegistrationScreenState();
}

class _RegistrationScreenState extends State<RegistrationScreen> {

  final _formKey = GlobalKey<FormState>();

  final _auth = FirebaseAuth.instance;
  bool showSpinner = false;
  String
      name,lastName,email,password;

  final databaseReference = Firestore.instance;

  bool rememberMe = false;
  bool showErrorMessage = false;

  void createRecord() async {
    await databaseReference.collection("user")
        .add({
      'name': '$name','lastName': '$lastName','email': '$email','password': 'password',}).then((value) {
      print(value.documentID);
    });
  }
and the action:

onPressed: rememberMe ? () async {
                          try {
                            final newUser =
                            await _auth.createUserWithEmailAndPassword(
                                email: email,password: password);
                            if (newUser != null) {
                              Navigator.pushNamed(context,ChatPage.id);
                            }

如果我使用pushReplacement可以工作，但是我可以将ID添加到ChatPage

解决方法

该错误表示未找到route，您需要先定义路线示例：

    initialRoute: '/',routes: {
      // When navigating to the "/" route,build the FirstScreen widget.
      '/': (context) => FirstScreen(),// When navigating to the "/second" route,build the SecondScreen widget.
      '/second': (context) => SecondScreen(),},

然后，您需要在route中使用pushNamed的名称，如果还要传递参数，则可以使用属性argument将参数发送到第二个屏幕：

          onPressed: () {
            // Navigate to the second screen using a named route.
            Navigator.pushNamed(context,'/second',arguments: "test");
          },

在SecondScreen()中，您可以收到参数：

class SecondScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
     var arguments = ModalRoute.of(context).settings.arguments;
    print(arguments);
    return Scaffold(
    //...

https://flutter.dev/docs/cookbook/navigation/named-routes

https://flutter.dev/docs/cookbook/navigation/navigate-with-arguments