The iPhone and iPod touch introduce innovative mobile platforms that are a joy to program.They are the first members of Apple’s new family of pocket-based computing devices. Despite their diminutive proportions, they run a first-class version of OS X with a rich and varied SDK that enables you to design, implement, and realize a wide range of applications. For your projects, you can take advantage of the iPhone’s multitouch interface and fabulous onboard features using Xcode. In this chapter, you discover how the SDK is put together and learn to build your first iPhone-based Hello World applications.
