Flutter IOS FCM push notification not coming into notification bar

问题

I am new to Flutter and IOS. I am configuring FCM push notifications for both Android and IOS.For android its working fine.I have done by referring this link https://medium.com/@jun.chenying/flutter-tutorial-part3-push-notification-with-firebase-cloud-messaging-fcm-2fbdd84d3a5e . For IOS, if the app is opened and if I send FCM from Firebase Console at the same time , Flutter on message is called (See the screenshot , logs are there) . But if I close the app , notification is not coming to notification bar but I am receiving in Android App, I don't know where is the problem , Problem with Apple Profiles or Flutter .

IOS Build Settings and Signing & Capabilities

Here is my code in flutter,

    class FirebaseNotifications {
       FirebaseMessaging _firebaseMessaging;
       SharedPreferences _sharedPreferences;

       void setUpFirebase() {
         _firebaseMessaging = FirebaseMessaging();
         initializeSharedPreferences();
         firebaseCloudMessaging_Listeners();
        }

        void initializeSharedPreferences() async {
        _sharedPreferences = await SharedPreferences.getInstance();
        }

        void firebaseCloudMessaging_Listeners() {
        if (Platform.isIOS) iOS_Permission();
        _firebaseMessaging.getToken().then((token) {
        _sharedPreferences.setString(Preferences.device_token, token);
         print('Token'+token);
         });

         _firebaseMessaging.configure(
          onMessage: (Map<String, dynamic> message) async {
          print('on message $message');
         },
          onResume: (Map<String, dynamic> message) async {
          print('on resume $message');
         },
         onLaunch: (Map<String, dynamic> message) async {
         print('on launch $message');
         },
       );
     }

     void iOS_Permission() {
     _firebaseMessaging.requestNotificationPermissions(
     IosNotificationSettings(sound: true, badge: true, alert: true));
     _firebaseMessaging.onIosSettingsRegistered
     .listen((IosNotificationSettings settings) {
     print("Settings registered: $settings");
    });
   }
  }

回答1:

You are not alone in this problem - try this solution.

Also, check if it not working both on debug and release builds of the application - there is a possibility of notifications not parsed by the debug variant of app.

回答2:

it's weird that it says Push Notifications (Profile) in your Xcode Capabilities Tab.

Maybe remove it again and add it again. And did you check the boxes "Background fetch" and "Remote notifications" in the "Background Modes"

回答3:

In case anyone else runs into this in the future, to expand on this answer. The issue was that in the Info.plist FirebaseAppDelegateProxyEnabled was set to bool rather than a string so:

    <key>FirebaseAppDelegateProxyEnabled</key>
    </false>

becomes

    <key>FirebaseAppDelegateProxyEnabled</key>
    <string>0</string>

回答4:

I managed to fix the problem with this solution:

1. In your info.plist:

    FirebaseAppDelegateProxyEnabled: false
   

2. Add this to your AppDelegate:

   override func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
   
      Messaging.messaging().apnsToken = deviceToken
      super.application(application, didRegisterForRemoteNotificationsWithDeviceToken: deviceToken)
    }
   

来源：https://stackoverflow.com/questions/60503422/flutter-ios-fcm-push-notification-not-coming-into-notification-bar