iOS Programming_ The Big Nerd Ranch Guide, 3_e pdf版本

iOS Programming: The Big Nerd Ranch Guide

Joe Conway and Aaron Hillegass

Copyright © 2012 Big Nerd Ranch, Inc.

All rights reserved. Printed in the United States of America. This publication is protected by copyright, and

permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or

transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For

information regarding permissions, contact

http://www.bignerdranch.com/

book-comments@bignerdranch.com

The 10-gallon hat with propeller logo is a trademark of Big Nerd Ranch, Inc.

Exclusive worldwide distribution of the English edition of this book by

Pearson Technology Group

800 East 96th Street

consequential damages in connection with or arising out of the use of the information or programs contained herein.

App Store, Apple, Cocoa, Cocoa Touch, Finder, Instruments, iCloud, iPad, iPhone, iPod, iPod touch, iTunes,

Keychain, Mac, Mac OS, Multi-Touch, Objective-C, OS X, Quartz, Retina, Safari, and Xcode are trademarks of

Apple, Inc., registered in the U.S. and other countries.

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 the publisher was aware of a trademark claim, the designations

have been printed with initial capital letters or in all capitals.

Acknowledgments

While our names appear on the cover, many people helped make this book a reality. We would like to take this

chance to thank them.

The other instructors who teach the iOS Bootcamp fed us with a never-ending stream of suggestions and

corrections. They are Scott Ritchie, Brian Hardy, Mikey Ward, Christian Keur, Alex Silverman, Owen

Matthews, Brian Turner, Juan Pablo Claude, and Bolot Kerimbaev.

Our tireless editor, Susan Loper, took our distracted mumblings and made them into readable prose.

versions.

The amazing team at Pearson Technology Group patiently guided us through the business end of book

publishing.

The final and most important thanks goes to our students whose questions inspired us to write this book and whose

frustrations inspired us to make it clear and comprehensible.

Table of Contents

Introduction

Style Choices

Typographical Conventions

Necessary Hardware and Software

1. A Simple iOS Application

Creating an Xcode Project

Building Interfaces

Model-View-Controller

Declarations

Declaring instance variables

Declaring methods

Deploying an Application

Application Icons

Launch Images

2. Objective-C

Objects

Using Instances

Creating objects

Sending messages

Destroying objects

Beginning RandomPossessions

Accessor methods

Instance methods

Initializers

Other initializers and the initializer chain

Using Initializers

Class methods

Testing your subclass

Exceptions and Unrecognized Selectors

Fast Enumeration

Challenges

The Heap

The Stack

Pointer Variables and Object Ownership

Memory Management

Using ARC for memory management

How objects lose owners

Strong and Weak References

Properties

Declaring properties

Projects, Targets, and Frameworks

Core Location

Receiving updates from CLLocationManager

Delegation

Protocols

Delegation, controllers, and memory management

Using the Debugger

Using breakpoints

Diagnosing crashes and exceptions

Bronze Challenge: Distance Filter

For the More Curious: Recording Video

13. UIPopoverController and Modal View Controllers

Universalizing Homepwner

Determining device family

UIPopoverController

More Modal View Controllers

Dismissing modal view controllers

Modal view controller styles

Completion blocks

Modal view controller transitions

Inter-family relationships

14. Saving, Loading, and Application States

Archiving

Application Sandbox

Constructing a file path

NSKeyedArchiver and NSKeyedUnarchiver

Application States and Transitions

Writing to the Filesystem with NSData

More on Low-Memory Warnings