Ditto on the Objective-C stuff, though personally I've been focusing on Mac OS X rather than iOS. Apple really documents things well, and the Cocoa community is

Ditto on the Objective-C stuff, though personally I've been focusing on Mac OS X rather than iOS. Apple really documents things well, and the Cocoa community is extremely nice and helpful. The shiny glare of quality extends deep into the inner depths of Apple's products.