Summary Written for Xcode 4, "iOS 4 in Action" guides you from setting up your development environment, through coding your first app, all the way to selling in the App Store. Work through sample applications including a chat client, a video game, an interactive map, background audio, and more as you explore the iOS 4 SDK. About the Technology Version 4 of the iOS SDK adds powerful new features like multitasking, GCD, blocks, and iAds. With the release of Xcode 4, it's easier than ever to get programming, even if you're new to Objective-C. About the Book "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. What's InsideFull coverage of iOS SDK 4.3Mastering Xcode 4Multitasking for iPhone and iPadGame Center, iAd, and AirPrintLocal and push notificationImplementing in-app purchasing Who Should Read this Book No previous iPhone or iPad know-how needed. Familiarity with C, Cocoa, or Objective-C helps but is not required =============================== Table of ContentsIntroducing iOS 4 with iPhone and iPadLearning Objective-CUsing Xcode 4Xcode and debuggingBasic view controllersMonitoring events and actionsAdvanced view controllersData: actions, preferences, and filesData: advanced techniquesPositioning: accelerometers, location, and the compassMedia: images and the cameraMedia: audio and recordingGraphics: Quartz, Core Animation, and OpenGLThe web: web views and internet protocolsPeer-to-peer connections using Game KitUsing Event Kit on the iPhone and iPadLocal and Push notification servicesThe Map Kit frameworkIn-app purchasing using Store KitMaking money with iAdIntroducing multitaskingMultitasking in depth