Programming iOS 4

The book Programming iOS 4 by Matt Neuburg gets you a solid grounding in all the fundamentals of Cocoa Touch, and avoid problems during iPhone and iPad app development. With Programming iOS 4, you'll dig into Cocoa and learn how to work effectively with Objective-C and Xcode. This book covers iOS 4 in a rigorous, orderly fashion—ideal whether you’re approaching iOS for the first time or need a reference to bolster existing skills. Paper version for less than 50$, ebook version less than 36$.