Appendix A. What’s Old in Core Data, Cocoa, Xcode, and Objective-C
Core Data, Xcode, and the Cocoa frameworks are evolving along with the hardware they run on. Mobile devices in particular have changed dramatically in the last few years as millions of people around the world have discovered new ways of using them and communicating with their friends. Hardware, software, and the ways in which people use them do not move in lockstep. One of the big challenges is keeping everything working together even as these changes occur.
This book focuses on Xcode 4, iOS 5, and Mac OS 10.7 (Lion). All of them have a number of new features. But when you are actually working with existing code, you may be looking at code written some time ago for a different ...
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