iOS 9 gives developers new tools for creating apps for iPhone and iPad, and our new edition of the classic iOS guide is updated to match. In this completely revised edition, you'll work through an app's entire lifecycle, from creating the project to publishing on the App Store. Starting with the basics, see how Swift 2.0 offers more power with less boilerplate code, bringing elegant error handling and functional programming concepts to your app development. Then dig into the capabilities of the iOS frameworks by building a real-world app, from a simple button to a multi-screen client that cleanly handles multi-tasking, networking, touch gestures, and more. Adapt a user interface from the smallest iPhone to the biggest iPad, multitask alongside other apps, and see how extensions let an app spread its functionality throughout the system.