Ниже приведен простой пример, демонстрирующий ваши требования:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
onGenerateRoute: (settings) {
WidgetBuilder builder;
Map arguments = settings.arguments;
switch (settings.name) {
case '/':
builder = (
BuildContext _,
) =>
SignUp();
break;
case '/otp':
builder = (
BuildContext _,
) =>
Otp(id: arguments["id"]);
break;
default:
return null;
}
return MaterialPageRoute(builder: builder, settings: settings);
},
);
}
}
class SignUp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Signup"),
),
body: Center(
child: FlatButton(
onPressed: () {
Navigator.of(context).pushNamed(
"/otp",
arguments: {
"id": "email@email.com",
},
);
},
child: Text("SEND OTP")),
),
);
}
}
class Otp extends StatelessWidget {
final String id;
Otp({this.id});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("OTP"),
),
body: Center(
child: Text(id),
),
);
}
}