UNNotification: Custom Sound for LocalNotification is not playing in iOS10

Question

I am firing the Local Notification. Since UILocalNotification class is deprecated in iOS10 I have used UserNotifications.framework

Answer 1

Long audio-files are not supported

Is your file longer then 30 seconds? If yes, it will not work. Only files shorter then 30 seconds are available. If the file is longer then 30 seconds then it will be replaced with default sound.

UNNotificationSound documentation

Answer 2

Try deleting app from device, Clean and Run again app in device.

Some Times resource are not get proper updated, I think, That is the problem in your case.