.. .Beginning iOS Development Exploring the iOS SDK ■■■ Dave Mark Jack Nutting Jeff LaMarche i www.it-ebooks.info Beginning iOS Development: Exploring the iOS SDK Copyright ©... . 254 Implementing a Search Bar 255 Rethinking the Design 255 A Deep Mutable Copy . 256 Updating the Controller Header File . 258 Modifying... .52 1 What We Didn’t Cover 52 2 ■Chapter 15: Grand Central Dispatch, Background Processing, and You 52 5 Grand Central Dispatch .52 5 Introducing SlowWorker