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Aside from UICollectionView and AutoLayout that were mentioned, there is much easier way to localize the app (one storyboard and many "strings" files, more ways to easily customize UI elements, and a few ARC things (no more manually managing dispatch queues, zeroing weak references, etc.)


and a few ARC things

According to this document [1]: ARC is fully supported in iOS 5, and there aren't any iOS-6-only Objective-C features.

http://developer.apple.com/library/ios/#releasenotes/Objecti...


There are a few iOS 6 ARC specific features. http://stackoverflow.com/questions/12730202/do-you-need-to-r...


Yeah. GCD queues are now Objective-C classes IIRC.




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