flutter 路由跳转的实现示例

Navigator.push(
  context,
  MaterialPageRoute(
     builder: (context) => DetailScreen(todo: todos[index]),
   ),
 );
1.通过RouteSettings传递参数
Navigator.push(
   context,
   MaterialPageRoute(
      builder: (context) => DetailScreen(),
      settings: RouteSettings(
        arguments: todos[index],
       ),
    ),
 );

 initialRoute 和 routes 来定义我们的路由
new MaterialApp(
   initialRoute: '/',
   routes: {
    '/': (context) => TodosScreen(todos: todos),
    '/detail': (context) => DetailScreen(),
   },
   title: 'ssss',
);

class ScreenArguments {
 final String title;
 final String message;
 ScreenArguments(this.title, this.message);
}

class ExtractArgumentsScreen extends StatelessWidget {
 static const routeName = '/extractArguments';
 @override
 Widget build(BuildContext context) {
  final ScreenArguments args = ModalRoute.of(context).settings.arguments;
  return Scaffold(
  );
 }
}

MaterialApp(
 routes: {
  ExtractArgumentsScreen.routeName: (context) => ExtractArgumentsScreen(),
 },
);

RaisedButton(
 onPressed: () {
  Navigator.pushNamed(
   context,
   ExtractArgumentsScreen.routeName,
   arguments: ScreenArguments(
    'Extract Arguments Screen',
    'This message is extracted in the build method.',
   ),
  );
 },
),

MaterialApp(
 onGenerateRoute: (settings) {
  if (settings.name == PassArgumentsScreen.routeName) {
   final ScreenArguments args = settings.arguments;
   return MaterialPageRoute(
    builder: (context) {
     return PassArgumentsScreen(
      title: args.title,
      message: args.message,
     );
    },
   );
  }
 },
);