Beginning iOS 5 Application Development by Wei-Meng Lee
If you want to develop apps for Apple's iPhone and iPad, first you need to know how to use the tools--iPhone's new iOS 5 operating system and SDK, and the new xCode toolset that come with it. This full-color book is the perfect starting point. Beginning developers, you'll get a solid introduction to the new xCode 4 and Objective-C and find everything you need to quickly build your first app. The book thoroughly covers all the new iOS 5 features, including new multitasking, location-based services, notification system, cloud-based features, and much more.