如何解决Flutter 访问我从 NavigationService 传递的值
我有一个 NavigationService,我通过它向另一个屏幕传递一个值。但我无法真正访问我传递给新屏幕的这个值。
我的导航服务:
class NavigationService {
final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
Future<dynamic> navigateto(String routeName,String eventName) {
return navigatorKey.currentState.popAndPushNamed(routeName);
}
goBack() {
navigatorKey.currentState.pop();
}
}
我传递值的行:
actions: <Widget>[
TextButton(
child: const Text('Submit'),onpressed: () {
textfieldController.text = eventName;
Navigator.pop(context);
locator<NavigationService>()
.navigateto(SonglistRoute,eventName);
},
以及我取值的屏幕:
class SongListView extends StatelessWidget {
final String eventName;
const SongListView({Key key,this.eventName}) : super(key: key);
@override
Widget build(BuildContext context) {
return ScreenTypeLayout(
mobile: SonglistViewMobile(eventName: eventName),desktop: SonglistViewDesktop(eventName: eventName),);
}
}
---- new File----
class SonglistViewDesktop extends StatefulWidget {
final String eventName;
SonglistViewDesktop({Key key,this.eventName}) : super(key: key);
@override
_songlistState createState() => _songlistState();
---i wont post my build widget here because its too much----
}
我无法访问我的构建小部件中的 eventName 值。
编辑!!!!
路由器类
Route<dynamic> generateRoute(RouteSettings settings) {
print('generateRoute: ${settings.name}');
switch (settings.name) {
case HomeRoute:
return _getPageRoute(HomeView());
case HelpRoute:
return _getPageRoute(HelpView());
case AboutRoute:
return _getPageRoute(AboutView());
case EnterRoute:
return _getPageRoute(EnterView());
case SonglistRoute:
return _getPageRoute(SongListView());
default:
return _getPageRoute(HomeView());
}
}
PageRoute _getPageRoute(Widget child) {
return PageRouteBuilder(
pageBuilder: (context,animation,secondaryAnimation) => child,transitionsBuilder: (context,secondaryAnimation,child) {
var begin = Offset(0.0,1.0);
var end = Offset.zero;
var curve = Curves.ease;
var tween = Tween(begin: begin,end: end).chain(CurveTween(curve: curve));
return SlideTransition(
position: animation.drive(tween),child: child,);
},);
}
const String HomeRoute = "home";
const String AboutRoute = "about";
const String HelpRoute = "help";
const String EnterRoute = "Enter";
const String SonglistRoute = "Songlist";
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