I have an app that send notifications if someone commented or published a new post. I use FCM and flutter local notification. It works well on Android, but on iOS it does not. I realized if I add a 'notification' message block to the firebase function then finally I get the data message BUT I get the notification message too at the same time. That is not what I want. If I remove Notification message then data message not triggered and I do not get any notification. The app should works only from iOS 10+. I tried this on iOS 15. This is my firebase function:
exports.myFunction = functions.firestore
.document("animal/{message}")
.onCreate((snapshot, context) => {
return admin.messaging().sendToTopic("animal", {
data: {
latitude: snapshot.data()["latitude"].toString(),
longitude: snapshot.data()["longitude"].toString(),
title: snapshot.data().username,
body: snapshot.data().description,
uid: snapshot.data().userId,
animalId: snapshot.id,
},
//I do not want to use this, but if I remove this I do not get any push notification. Data notification neither.
//On Android it does not matter if I delete notification block or no. I will get the data notification.
notification: {
title: "title",
body: "new post",
},
});
});
In main.dart there is the flutter local notification initializing
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp(
options: DefaultFirebaseOptions.currentPlatform,
);
final FlutterLocalNotificationsPlugin _flutterLocalNotificationsPlugin =
FlutterLocalNotificationsPlugin();
final AndroidInitializationSettings _initialzationSettingsAndriod =
AndroidInitializationSettings('noticon');
final IOSInitializationSettings _initialzationSettingsIOS =
IOSInitializationSettings(
requestAlertPermission: false,
requestBadgePermission: false,
requestSoundPermission: false,
);
final InitializationSettings _initializationSettings = InitializationSettings(
android: _initialzationSettingsAndriod, iOS: _initialzationSettingsIOS);
_flutterLocalNotificationsPlugin
.resolvePlatformSpecificImplementation<
AndroidFlutterLocalNotificationsPlugin>()
?.createNotificationChannel(channel);
await _flutterLocalNotificationsPlugin.initialize(
_initializationSettings,
onSelectNotification: (payload) async {
if (payload != null) {
debugPrint('notification payload: ' + payload);
}
initPayload = payload!;
await navigatorKey.currentState!.push(CupertinoPageRoute<void>(
builder: (BuildContext context) => AnimalDetailScreen(payload, true),
));
},
);
....
@override
void initState() {
super.initState();
_requestPermissions();
final messaging = FirebaseMessaging.instance;
messaging.subscribeToTopic('animal');
messaging.subscribeToTopic('notifications');
messaging.requestPermission(
alert: true,
sound: true,
badge: true,
provisional: false,
);
And this is the showing notification. If I remove the notification message from firebase function then onMessage cannot be called on iOS but on only Android.
FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
print("onMessage called");
....
if (isValid && currentUser != message.data['uid']) {
showNotification(message);
notifierCounter.value = notifierCounter.value + 1;
}
}
...
showNotification(RemoteMessage message) async {
Map<String, dynamic> data = message.data;
await flutterLocalNotificationsPlugin.show(
data.hashCode,
data['title'],
data['body'],
NotificationDetails(
android: AndroidNotificationDetails(
channel.id,
channel.name,
channelDescription: channel.description,
priority: Priority.high,
),
iOS: IOSNotificationDetails(),
),
payload: data['animalId'],
);
}
