AVAudioPlayer fade volume out

Question

I have an AVAudioPlayer playing some audio (duh!)

The audio is initiated when the user presses a button. When they release it I want the audio to fade out.

I

Answer 1

A very good solution to this problem is available from Nick Lockwood at objc.io. It leverages Core Animation to time volume changes which can come in handy if one needs to synchronise UI animations with audio volume changes, including interactive animations.