Learn iOS 8 App Development is both a rapid tutorial and a useful reference. You'll quickly get up to speed with Objective-C, Cocoa Touch, and the iOS 8 SDK. It's an all-in-one getting started guide to building your first iPhone or iPad app. You'll learn best practices that ensure your code will be efficient and perform well, earning positive reviews on the iTunes App Store, and driving better search results and more revenue.
Learn cocos2d 2: Game Development with iOS provides a rock-solidand expandedintroduction to the new cocos2d 2.0 iOS game apps creation engine and related tools, including the new Kobold2D project and more.
Learn Cocoa for the Mac, Second Edition, completely revised for OS X Mountain Lion and XCode 4, guides you through the jungle of classes, tools, and new concepts so that you can get started on the next great OS X app today.
Don't know anything about programming? No problem! Acclaimed author Dave Mark starts out with the basics and takes you through a complete course in programming C using Apple's free Xcode tools for Mac and iPhone, using contemporary OS X and iOS, respectively.