Foreword
As a longtime participant in the iPhone hacking community, I have often been asked just what I think about the iPhone SDK. I’ll take a moment to reward those of you who have purchased this book with an answer. In short, Apple’s iPhone SDK adds some very nice high-level functionality to clean up an otherwise hideous mess. Deep underneath the SDK’s comfy pillows rests a very disorganized and poorly designed set of frameworks, but some of that ugly was also very functional in areas where the SDK is not. The SDK is certainly good enough to write a high-quality, functional application for the AppStore (if it weren’t, I wouldn’t be writing about it). The interfaces provided by the SDK are written well enough for most good developers to design good software, but most people are unaware of the functionality that isn’t available to them. For those who cut their teeth in the open source world, the iPhone SDK is still a point of contention.
If you’re unfamiliar with the politics surrounding the SDK, there are two sets of developer interfaces: those provided by the SDK, and those that Apple uses. While there is some overlap between the two, I wrote about many classes and frameworks you’ve never heard of in my book iPhone Open Application Development (O’Reilly). You’ve never heard of them because they are not available in the SDK. Many of us in the early iPhone hacking community discovered them by breaking into the iPhone’s operating system directly. Throughout many ...
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