swift - Flutter iOS: Handling Push Notifications When App is Inactive - Stack Overflow

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I'm developing a Flutter application that utilizes Firebase Cloud Messaging (FCM) for push notifications. While notifications are handled correctly on Android in all app states, I'm encountering issues on iOS when the app is inactive or in the background. Specifically, notifications are not processed unless the user taps on them.

Here's what I've implemented so far:

1. Enabled "Push Notifications" and "Background Modes" (with "Background fetch" and "Remote notifications") in Xcode.

2. Configured FCM with the appropriate APNs authentication key.

3. Implemented a background message handler in Flutter:

   Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
     await Firebase.initializeApp();
     // Custom handling logic
   }
   
   void main() {
     WidgetsFlutterBinding.ensureInitialized();
     Firebase.initializeApp();
     FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
     runApp(MyApp());
   }
   
   

Despite these configurations, background notifications are not being processed automatically. They only trigger the handler when tapped by the user.

Question: How can I ensure that my Flutter app on iOS processes incoming push notifications even when the app is inactive, without requiring user interaction?

Any guidance or suggestions would be greatly appreciated.

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