Get a rapid introduction to iPhone, iPad, and iPod touch programming. With this easy-to-follow guide, you’ll learn the steps necessary for developing your first marketable iOS application, from opening Xcode to submitting your product to the App Store. Whether you’re a developer new to Mac programming or an experienced Mac developer ready to tackle iOS, this is your book. You’ll learn about Objective-C and the core frameworks hands-on by writing iOS applications that use them, giving you the basic skills for building your own applications independently. Packed with code samples, this book is refreshed and updated for iOS 5 and Xcode 4.
Alasdair Allan is a British scientist, author, hacker, maker, and journalist. An expert on the Internet of Things and sensor systems, he’s famous for hacking hotel radios, deploying a 500-node mesh sensor network at Google I/O, and for revealing, back in 2011, that Apple’s iPhone was tracking user location constantly. He has written for Make: Magazine, VICE/Motherboard, Hackster.io, Hackaday, and to the O’Reilly Radar. A former academic, he also built a peer-to-peer autonomous telescope network that detected what was, at the time, the most distant object ever discovered.
Good intro, but it's only an intro. It shows you tricks and has plenty of small apps to get you started, but doesn't explain anything in any kind of detail or depth.