a0091 oreilly programming ios 5 2nd edition mar 201 morebook vn 8177

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SECOND EDITION

Programming iOS 5

Matt Neuburg

Beijing • Cambridge • Farnham • Kưln • Sebastopol • Tokyo


Programming iOS 5, Second Edition
by Matt Neuburg
Copyright © 2012 Matt Neuburg. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions
are also available for most titles (). For more information, contact our
corporate/institutional sales department: (800) 998-9938 or

Editor: Brian Jepson
Production Editor: Kristen Borg
Proofreader: O’Reilly Production Services
March 2012:

Indexer: Matt Neuburg
Cover Designer: Karen Montgomery
Interior Designer: David Futato
Illustrator: Matt Neuburg

Second Edition.

Revision History for the Second Edition:
2011-12-23
Early release
2012-03-12
First release
See for release details.

Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of
O’Reilly Media, Inc. Programming iOS 5, the image of a kingbird, and related trade dress are trademarks
of O’Reilly Media, Inc.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as
trademarks. Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a
trademark claim, the designations have been printed in caps or initial caps.
While every precaution has been taken in the preparation of this book, the publisher and author assume
no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein.

ISBN: 978-1-449-31934-2
[M]
1331571373


Table of Contents

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Part I. Language
1. Just Enough C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Compilation, Statements, and Comments
Variable Declaration, Initialization, and Data Types
Structs
Pointers
Arrays
Operators
Flow Control and Conditions
Functions
Pointer Parameters and the Address Operator
Files
The Standard Library
More Preprocessor Directives
Data Type Qualifiers

4
6
8
10
13
14
16
20
23
25
27
28
29

2. Object-Based Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Objects

Messages and Methods
Classes and Instances
Class Methods
Instance Variables
The Object-Based Philosophy

31
32
33
36
37
38

3. Objective-C Objects and Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
An Instance Reference Is a Pointer
Instance References, Initialization, and nil

43
44

iii


About the Author
Matt Neuburg has a PhD in Classics and has taught at many universities and colleges.
He has been programming computers since 1968. He has written applications for Mac
OS X and iOS, is a former editor of MacTech Magazine, and is a long-standing contributing editor for TidBITS. His previous O'Reilly books are Frontier: The Definitive
Guide, REALbasic: The Definitive Guide, and AppleScript: The Definitive Guide. He
makes a living writing books, articles, and software documentation, as well as by programming, consulting, and training.

Colophon
The animal on the cover of Programming iOS 5 is a kingbird, one of the 13 species of
North American songbirds making up the genus Tyrannus. A group of kingbirds is
called a “coronation,” a “court,” or a “tyranny.”
Kingbirds eat insects, which they often catch in flight, swooping from a perch to grab
the insect midair. They may also supplement their diets with berries and fruits. They
have long, pointed wings, and males perform elaborate aerial courtship displays.
Both the genus name (meaning “tyrant” or “despot”) and the common name (“kingbird”) refer to these birds’ aggressive defense of their territories, breeding areas, and
mates. They have been documented attacking red-tailed hawks (which are more than
twenty times their size), knocking bluejays out of trees, and driving away crows and
ravens. (For its habit of standing up to much larger birds, the gray kingbird has been
adopted as a Puerto Rican nationalist symbol.)
“Kingbird” most often refers to the Eastern kingbird (T. tyrannus), an average-size
kingbird (7.5–9 inches long, wingspan 13–15 inches) found all across North America.
This common and widespread bird has a dark head and back, with a white throat,
chest, and belly. Its red crown patch is rarely seen. Its high-pitched, buzzing, stuttering
sounds have been described as resembling “sparks jumping between wires” or an electric fence.
The cover image is from Cassell’s Natural History. The cover font is Adobe ITC Garamond. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed;
and the code font is LucasFont’s TheSansMonoCondensed.


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