I know how to use vibrate in in the foreground. I want to know how to use it in the background...
I searched a lot in stackoverflow but I didn't find the right answer, only an answer from 2011, where you use a silent soundfile (vibrate in push notification).
If the sound of the iPhone is turned on, can you make the iPhone vibrate only on a push notification? Is the silent soundfile the only way to do this?
Including the silent sound file to vibrate still works with iOS11.
Make sure you request the sound
attribute for your notifications.