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Apple actually has a wealth of high-quality, Objective-C PDF's online for free. Intro to Objective-C: http://developer.apple.com/mac/library/documentation/coco

• Zev 17y ago
  There's also the (longer) Cocoa Fundamentals Guide that Apple has, http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/CocoaFundamentals/CocoaFundamentals.pdf http://developer.apple.com/mac/library/documentation/Cocoa/C.... Instead of focusing on the language, it goes over the basic frameworks you'll use, the design patterns that the frameworks use, delegation, target-action, bindings, and so on. Pretty much the basics of everything that you'd possibly need to know to make an app, either on the iPhone or OS X.