Appendix. Appendix

The appendix covers

  • Introduction to Objective-C
  • Using blocks
  • Optimizing applications with Grand Central Dispatch
  • Understanding automatic reference counting

When you write applications, all you’re doing is providing a set of instructions for the computer to follow. These instructions are specifically crafted in a language that both the compiler and humans can understand. In iOS, the language you write in is Objective-C, and we used it extensively throughout the book. This appendix includes information about the language that will provide you with a better understanding of how iOS applications work.

A.1. Introduction to Objective-C

Objective-C is the primary language you use when writing iOS applications. It’s based ...

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