how to add custom sound in iOS with flutter? - ios

Question

I am new to push notifications and I have this task to add a custom sound whenever the user receives a notification. I am not using flutter local notifications, just the normal firebase configurations and its working well. Can anyone help me add a custom sound for iOS. Any help would be greatly appreciated!
Here is the payload used and the firebase configurations.
options = {
"notification": {
"title": formatter.title,
"body": formatter.body,
"sound": "notification.caf",
"content_available": true,
},
"priority": "high",
"data": {
"badge": user.unopened_notification_count,
"body": formatter.body,
"title": formatter.title,
"id": notification.id,
"notifiable_type": notification.notifiable_type,
"notifiable_id": notification.notifiable_id,
"click_action": "FLUTTER_NOTIFICATION_CLICK"
}
}
also here is my firebase configuration:
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
if (Firebase.apps.isEmpty) await Firebase.initializeApp();
print('Handling a background message ${message.data['id']}');
}
handleNotifications() async {
FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(badge: false, alert: false, sound: true); //presentation options for Apple notifications when received in the foreground.
FirebaseMessaging.onMessage.listen((message) async {
print('Got a message whilst in the FOREGROUND!');
return;
}).onData((data) async {
print('Got a DATA message whilst in the FOREGROUND!');
print('data from stream: ${data.data['id']}');
});
FirebaseMessaging.onMessageOpenedApp.listen((message) async {
print('NOTIFICATION MESSAGE TAPPED');
return;
}).onData((data) async {
print('NOTIFICATION MESSAGE TAPPED');
print('data from stream: ${data.data}');
});
FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
FirebaseMessaging.instance.getInitialMessage().then((value) => value != null ? _firebaseMessagingBackgroundHandler : false);
return;
}
attached image here is where I placed the sound file inside Xcode