iOS Background Custom Sound Not Working

[bedirhanayydin]

Hello, the code I wrote works on both iOS and Android. On iOS, the custom notification sound plays when the app is in the foreground. However, when the app is in the background, notifications are received but the notification sound doesn't play. How can I solve this issue on iOS?

import 'package:flutter_local_notifications/flutter_local_notifications.dart';

void sendNotification({String? title, String? body}) async {
  FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();

  // iOS (Darwin) settings
  const DarwinInitializationSettings initializationSettingsIOS = DarwinInitializationSettings(
    requestSoundPermission: true,
    requestBadgePermission: true,
    requestAlertPermission: true,
  );
  const InitializationSettings initializationSettings = InitializationSettings(
    iOS: initializationSettingsIOS,
  );
  await flutterLocalNotificationsPlugin.initialize(
    initializationSettings,
  );

  DarwinNotificationDetails iosNotificationDetails = DarwinNotificationDetails(
    sound: "slow_spring_board.mp3",
    presentSound: true,
    presentAlert: true,
    presentBadge: true,
  );

  flutterLocalNotificationsPlugin.show(
    0,
    title,
    body,
    NotificationDetails(
      iOS: iosNotificationDetails,
    ),
  );
}

[Blacktaler]

having the same problem

[bedirhanayydin]

@MaikuB can you help us

[MaikuB]

Are you using FCM?

[MaikuB]

yes

There's your answer then. Please make sure you're distinguishing between FCM and this plugin that when you raise an issue and include code that it actually reproduces the issue specific to this plugin. The native APIs that the plugin don't behave differently based on if the app is in the foreground or not. A relatively easy way to reproduce this is schedule a notification using the plugin and kill the app so that the scheduled notification appears whilst the app is killed

[bedirhanayydin]

My codes are above, where do you think I'm making a mistake?

[MaikuB]

This isn't about a coding mistake and I don't specifically help with debugging an individual's code. As mentioned in my previous post you'll need to make sure you understand how FCM works

[bedirhanayydin]

Thank you, I actually understood the fcm, but I just didn't understand why the custom sound I get when the application is open does not play the same sound when the application is closed.