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If diving into SDK programming without a lifeline seems daunting, be reassured. Xcode simplifies the process of getting started. It provides preconfigured projects that you can easily adapt while exploring the SDK. These projects provide fully working skeletons. All you need to do is add a little custom functionality to make that app your own.
To get started, launch Xcode 4 and choose File > New Project (Command-Shift-N). The New Project template window (see Figure 3-1) opens, allowing you to select one of these application styles to get started. These project styles are chosen to match the most common development patterns for iOS. Your choices are as follows: