在Flutter应用中如何在没有上下文的情况下进行导航? [英] How to navigate without context in flutter app?

问题描述

我有一个应用程序可以使用OneSignal接收推送通知.我做了一个通知打开的处理程序，应该在单击通知时打开特定的屏幕.我如何导航到没有上下文的屏幕.或如何在应用启动时打开特定屏幕.我的代码:

I have an app that recieves push notification using OneSignal. I have made a notification opened handler that should open specific screen on click of the notification. How can i navigate to a screen without context. or how can I open specific screen on app startup. My code:

OneSignal.shared.setNotificationOpenedHandler((notification) {
  var notify = notification.notification.payload.additionalData;
  if (notify["type"] == "message") {
    Navigator.of(context).push(
      MaterialPageRoute(
        builder: (context) => DM(user: notify['id']),
      ),
    );
  }
  if (notify["type"] == "user") {
    Navigator.of(context).push(
      MaterialPageRoute(
        builder: (context) => Profileo(notify["id"]),
      ),
    );
  }
  if (notify["type"] == "post") {
    Navigator.of(context).push(
      MaterialPageRoute(
        builder: (context) => ViewPost(notify["id"]),
      ),
    );
  }
});

首次打开该应用程序时，我可以实现此目的，但只有在我关闭该应用程序并且即使我重新打开它的情况下，它才能打开主页.我想那是因为上下文已更改.

I am able to achieve this when the app is opened for the first time but It only opens the homepage If i close the app and even if I re-open it. I guess that is because the context is changed.

请帮助！

推荐答案

在这里查看: https://github.com/brianegan/flutter_redux/issues/5#issuecomment-361215074

您可以为导航设置全局键:

You can set a global key for your navigation:

final GlobalKey<NavigatorState> navigatorKey = new GlobalKey<NavigatorState>();

将其传递给MaterialApp:

Pass it to MaterialApp:

new MaterialApp(
      title: 'MyApp',
      onGenerateRoute: generateRoute,
      navigatorKey: navigatorKey,
    );

推路线:

navigatorKey.currentState.pushNamed('/someRoute');

这篇关于在Flutter应用中如何在没有上下文的情况下进行导航?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！