Part III: Advanced Concepts
The first four chapters in Part III cover Objective-C memory management in detail. Chapter 14 is an overview of Objective-C memory management. Chapter 15 covers manual reference counting. Manual reference counting is a memory management system that keeps a count of the number of places an object is used. It requires the programmer to explicitly code various memory management methods. Chapter 16 covers Automatic Reference Counting (ARC). ARC automates the reference counting system described in Chapter 15.
Chapter 17 covers Objective-C 2.0’s blocks feature, which is a central part of Apple’s Grand Central Dispatch concurrency mechanism.
Chapter 18 covers a few recently introduced items that seemed not to fit anywhere ...
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