Free iOS 9 tutorials

iOS 9 introduces a wealth of great new functionality for developers, and I want to teach you how to get started with iOS 9 features in your own apps and games.

Note: If you have yet to learn Swift, I wrote a huge collection of free Swift tutorials that teach you how to make iOS apps – you should start there first before progressing onto these tutorials.

• Overview: What's new in iOS 9? – this walks you through some of the key new features for developers in iOS 9, complete with code examples.
• Overview: What's new in Swift 2? – this highlights the many changes and improvements made in Swift, with code examples for you to try.
• In Detail: The new features of Swift 2 by example – this gives a detailed breakdown of the key syntax changes: error handling, guard, defer and availability checking.

• Learn UIStackView and iPad multitasking – build a multi-page web browser using the new stack view in iOS 9, then make it work great when used in Slide Over or Split View multitasking.
• Learn Core Spotlight and SFSafariViewController – index your app data in the iOS search, then load content using the new SafariServices framework.
• Learn CloudKit and UIStackView – try the improved CloudKit syntax in Swift 2, while adding in AVAudioRecorder and some extra UIStackView action.
• Learn GameplayKit and GKMinmaxStrategist – create a Four in a Row game with advanced AI thanks to the artificial intelligence built right into iOS 9.
• Learn GameplayKit and GKRandomSource – learn how the new randomization techniques let you easily create true random, fair random and even Gaussian random.
• Learn SKAudioNode and GKRandomDistribution – create a Flappy Bird clone using physics, particle systems and looping background music.
• Learn 3D Touch, CAGradientLayer, CAEmitterLayer, and WatchKit – create a psychic hoax game that is guaranteed to fool your friends.
• Learn Safari content blocking – use the Safari content blocker extension introduced in iOS 9 to block any kind of web content in minutes.