Description |
- The new memory management system—ARC—is thoroughly explained and all code examples have been revised to use it.
- New Objective-C features, such as declaration of instance variables in the class’s implementation section, are described and incorporated into the revised example code.
- Discussion of how an app launches, and all code examples, are revised for project templates from Xcode 4.2 and later.
- Other new Xcode features, including the Simulator’s Debug menu, are covered, with screen shots based on Xcode 4.2 and later.
- The discussion of Instruments is expanded, with screen shots—by popular request!
- Storyboards are explained and discussed.
- The explanation of view controllers is completely rewritten to include iOS 5 features, such as custom parent view controllers and UIPageViewController.
- The Controls chapter now includes iOS 5 interface customizability and the appearance proxy.
- New features of interface classes are discussed, including tiling and animated images, new table view features, new alert view styles.
- Coverage of frameworks such as Core Motion and AV Foundation is greatly expanded. New iOS 5 classes and frameworks are also discussed, including Core Image and UIDocument (and iCloud support).
- Important iOS 5 changes that can break existing code are explicitly called out in the text and listed in the index.
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