https://patrickbalestra.com/blog/2019/06/07/wwdc-2019-the-things-you-may-have-missed.html
WWDC 2019 Things You May Have Missed
Jun 15, 2019
Jun 15, 2019
Jun 12, 2019
SwiftUI
Xcode 11
Jun 12, 2019
Hardware
iOS 13
Jun 6, 2019
Newer article - https://developer.apple.com/documentation/uikit/view_controllers/preserving_your_app_s_ui_across_launches
Old article - https://developer.apple.com/library/archive/featuredarticles/ViewControllerPGforiPhoneOS/PreservingandRestoringState.html
Tutorial 1 - https://useyourloaf.com/blog/state-preservation-and-restoration/
Tutorial 2 - https://www.raywenderlich.com/1395-state-restoration-tutorial-getting-started
Jun 6, 2019
App Store and Distribution
Developer Tools
May 31, 2019
May 24, 2019
May 14, 2019
Apr 18, 2019
Mar 14, 2019
https://www.raywenderlich.com/2431-audio-tutorial-for-ios-playing-audio-programatically-2014-edition
System Sound Services / AudioServicesPlaySystemSound(), AVAudioPlayer, and more.