Cephalopod is a library that can help fading sounds in and out with AvAudioPlayer. One can set duration, velocity of the fade and a completion function. Velocity can vary from linear to exponential.
Cephalopod
Related Posts
SwiftDSSocket
DispatchSource based socket framework written in pure Swift
iOS Floating Button
Easily customizable floating button menu created with SwiftUI
FFmpeg Android
Script and Instructions for building FFmpeg for Android