flutter 使用命名路由传递参数

1、定义路由，在MaterialApp下

@override
Widget build(BuildContext context) {
  return MaterialApp(
    title: 'Demo',
    initialRoute: "/",
    routes: {
      // "/": (context) => AnimationPage(),
      "/": (context) => AppFrame(),
      "/login": (context) => LoginPage(),
      "/self_detail": (context) => SelfDetail(),
    },
  );
}

当然也可以通过onGenerateRoute方式来，但是就不能用routes

2、定义要传递的参数类

class SelfDetailArg {
  final String title;
  SelfDetailArg(this.title);
}

3、路由跳转并传递参数

onPressed: () {
  Navigator.of(context).pushNamed("/self_detail", arguments: SelfDetailArg('版本号: v1.0.0'));
},

4、在路由页面获取传递过来的参数

final SelfDetailArg arg = ModalRoute.of(context)?.settings.arguments as SelfDetailArg;

5、遇到的问题： 官方已经说了4种可能，第五种可能是存在2个MaterialApp

Could not find a generator for route RouteSettings("/HomePage", null) in the _WidgetsAppState.

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