iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics
Move into iOS development by getting a firm grasp of its fundamentals, including the Xcode IDE, the Cocoa Touch framework, and Swift 2.0—the latest version of Apple's acclaimed programming language. With this thoroughly updated guide, you'll learn Swift’s object-oriented concepts, understand how to use Apple's development tools, and discover how Cocoa provides the underlying functionality iOS apps need to have.
Once you master the fundamentals, you'll be ready to tackle the details of iOS app development with author Matt Neuburg's companion guide, Programming iOS 9.