Is it possible for Java Script programmers to learn Apple’s i OS 4 SDK and live to tell the tale? Technology guru Danny Goodman did, and with this book he leaves a well-marked trail for you to follow. An authority on Java Script since its inception, Goodman understands the challenges you might face in creating native i OS apps with this SDK, and introduces Xcode, Objective-C, and Cocoa Touch in a context you’ll readily understand.Why bother with the SDK when you can simply build web apps for Apple’s i OS devices? Web apps can’t access an i Phone’s music library, camera, or i OS system software for maps, audio, and more. Nor can you sell web apps in the App Store. If you want to take full advantage of the i Phone and i Pad, i OS 4 SDK is your tool — and this is your book. Includes full coverage of i OS SDK 4.2.Learn the distinction between web app and i OS native app programming Create a workbench app to test code snippets throughout the learning process Get a structural view of an i OS app, and compare the process of building objects in Objective-C versus Java Scipt Discover how your code launches i OS apps and makes them user-ready Learn about i OS memory management details that are different from Java Script, including pointers and data types Use Objective-C and Cocoa Touch to implement common Java Script tasks