Anyone with programming experience can learn how to write an iPhone app. But if you want to build a great app, there's a lot more to it than simple coding: you also need to know how design and market your creation. This easy-to-follow guide walks you through the entire process, from sketching out your idea to promoting the finished product. Get to know the tools for developing your iPhone appDesign a great app before you start codingBuild a complex app with Xcode and Interface BuilderDecide how to brand your app-then beta-test that brand in the rea