iOS 4 in Action: Examples and Solutions for iPhone & iPad by Jocelyn Harrington, Brandon Trebitowski

iOS 4 in Action, written for Xcode 4, is a detailed, hands-on guide that goes from setting up your development environment, through your first coding steps, all the way to creating a polished, commercial iOS 4 application. You'll run through examples from a variety of areas including a chat client, a video game, an interactive map, and background audio. You'll also learn how the new iOS 4 features apply to your existing iOS 3 based apps. This book will help you become a confident, well-rounded iOS 4 developer.