iPhone Programming: The Big Nerd Ranch Guide (Big Nerd Ranch Guides)

476 Pages·2010·20.5 MB·English

by  Joe Conway

iPhone Programming
The Big Nerd Ranch Guide
Joe Conway
Aaron Hillegass
iPhone Programming: The Big Nerd Ranch Guide
by Joe Conway and Aaron Hillegass
Copyright © 2010 Big Nerd Ranch, Inc.
All rights reserved. Printed in the United States of America. This publication is protected by copyright, and permis-
sion 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, recoring, or likewise. For informa-
tion regarding permissions, contact
Big Nerd Ranch, Inc.
1963 Hosea L. Williams Drive SE
Suite 209
Atlanta, GA 30317
[phone]
http://www.bignerdranch.com/
[e-mail]
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
Indianapolis, IN 46240 USA
http://www.informit.com
ISBN-13 978-0321706249
ISBN-10 0321706242
First printing May 2010
The authors and publisher have taken care in writing and printing this book but make no expressed or implied war-
ranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or con-
sequential damages in connection with or arising out of the use of the information or programs contained herein.
App Store, Apple, Bonjour, Cocoa, Cocoa Touch, Finder, Instruments, Interface Builder, iPad, iPhone, iPod, iPod
touch, iTunes, iTunes Store,
Keychain, Leopard, Mac, Mac OS, Multi-Touch, Objective-C, Quartz, Snow Leopard, 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 trade-
marks. 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.
Acknowledgements
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 iPhone Bootcamp fed us with a never-ending stream
of suggestions and corrections. They are Scott Ritchie, Brian Hardy, and Alex von Below.
• Our tireless editor, Susan Loper, took our distracted mumblings and made them into read-
able prose.
• Several technical reviewers helped us find and fix flaws. They are Bill Monk, Mark Miller,
Alex Silverman,
Jonathan Saggau, and Mikey Ward.
• Ellie Volckhausen designed the cover. (The photo is of the bottom bracket of a bicycle
frame.)
• The amazing team at Pearson Technology Group patiently guided us through the busi-
ness 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.
PDF: CrUmp
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iPhone Programming: The Big Nerd Ranch Guide
Chapter 1. A Simple iPhone Application 1
Creating an Xcode Project 2
Using Interface Builder 4
Model-View-Controller 8
Declarations
10
Declaringmethods
12
Making Connections 12
Settingpointers
13
Settingtargetsandactions
14
Summary
16
Implementing Methods 17
Build and Run on the Simulator 19
Event-driven Programming 20
Application Icons 22
Default Images 24
Chapter 2. Objective-C 26
Using Instances 27
Writing the RandomPossessions Tool 30
NSArrayandNSMutableArray
34
Subclassing an Objective-C Class 36
Accessorsandproperties
40
Instancemethods
42
Initializers
43
self
45
super
46
Initializerchain
47
Classmethods
48
Exceptions and the Console Window 52
Objective-C 2.0 Additions 54
Chapter 3. Memory Management 56
Memory Management Concepts 56
ManagingmemoryinC
57
Managingmemorywithobjects
58
Reference Counting 59
Usingretaincounts
60
Avoidingmemoryleakswithautorelease
62
Managingmemoryinaccessorsandproperties
64
Retaincountrules
65
Managing Memory in RandomPossessions 66
Chapter 4. Delegation and Core Location 73
Delegation 73
Beginning the Whereami Application 77
Usingframeworks
77
CoreLocation
78
ReceivingupdatesfromCLLocationManager
81
Releasing Controller Instance Variables 83
Challenge: Heading 84
For the More Curious: Compiler and Linker Errors 84
For the More Curious: Protocols 86
Chapter 5. MapKit and Text Input 89
Object Diagrams 89
Interface Properties 92
Being a MapView Delegate 94
YourownMKAnnotation
97
Tagginglocations
100
TextInputandtheFirstResponder
101
PuttingthePiecesTogether
103
Challenge: Annotation Extras 105
Challenge: Reverse Geocoding 105
Challenge: Changing the Map Type 105
For the More Curious: Renaming an Application 105
Chapter 6. Subclassing UIView 108
Creating a Custom View 108
ThedrawRect:method
110
InstantiatingaUIView
112
Drawing Text and Shadows 114
Using UIScrollView 115
Zooming 117
Hiding the Status Bar 119
Challenge: Colors 119
For the More Curious: Retain Cycles 119
For the More Curious: Redrawing Views 120
Chapter 7. View Controllers 122
View Controllers and XIB Files 122
Using View Controllers 125
Creating the UITabBarController 126
Creatingviewsfortheviewcontrollers
132
The Lifecycle of a View Controller 139
Challenge: Map Tab 141
For the More Curious: Paging 141
Chapter 8. The Accelerometer 143
Setting Up the Accelerometer 144
Getting Accelerometer Data 145
Orientation and Scale of Acceleration 146
Using Accelerometer Data 146
Smoothing Accelerometer Data 148
Detecting Shakes 148
Challenge: Changing Colors 152
For the More Curious: Filtering and Frequency 152
Chapter 9. Notification and Rotation 155
Notification Center 155
UIDevice Notifications 156
Autorotation 158
For the More Curious: Forcing Landscape Mode 162
Challenge: Proximity Notifications 164
For the More Curious: Overriding Autorotation 164
Chapter 10. UITableView and UITableViewController 166
Beginning the Homepwner Application 167
UITableViewController 167
SubclassingUITableViewController
168
UITableView’s Data Source 173
UITableViewDataSourceprotocol
175
UITableViewCells 178
Reusing UITableViewCells 181
Challenge: Sections 183
Chapter 11. Editing UITableViews 184
Editing Mode 184
Deleting Rows 189
Moving Rows 190
Chapter 12. UINavigationController 198
UINavigationController 199
UINavigationBar
203
An Additional UIViewController 206
The XIB File and File’s Owner 208
SettingupItemDetailViewController
209
Navigating with UINavigationController 211
Appearinganddisappearingviews
217
Challenge: Number Pad 218
Chapter 13. Camera and UIImagePickerController 219
ImageCache: a Singleton 219
NSDictionary
220
TakingpicturesandUIImagePickerController
227
Creatingandusingkeys
232
DismissingtheKeyboard
237
Challenge: Removing an Image 238
For the More Curious: Recording Video 238
Chapter 14. Saving and Loading 242
Application Sandbox 242
Archiving 245
Writing to Disk with NSData 253
Challenge: Archiving Wherewasi 256
For the More Curious: The Application Bundle 258
Chapter 15. Low-Memory Warnings 262
Handling Low-Memory Warnings 262
Simulating Low-Memory Warnings 266
Chapter 16. Subclassing UITableViewCell 268
Creating HomepwnerItemCell 269
Createsubviews
270
Layoutsubviews
272
Usingthecustomcell
273
Image Manipulation 275
Challenge: Accessory Views 281
Challenge: Make it Pretty 281
Chapter 17. Multi-Touch, UIResponder, and Using Instruments 282
Touch Events 282
Creating the TouchTracker Application 283
Turning Touches Into Lines 288
The Responder Chain 290
TheObjectAllocInstrument
292
TheSamplerInstrument
296
Challenge: Saving and Loading 298
Challenge: Circles 298
For the More Curious: UIControl 298
Chapter 18. Core Animation Layer 301
Creating a CALayer 303
For the More Curious: Programmatically Generating Content 312
For the More Curious: Layers and Views 313
Challenge: Dynamic Layer Content 316
Chapter 19. Controlling Animation with CAAnimation 317
Animation Objects 317
Spinning the Time with CABasicAnimation 321
Bouncing the Time with a CAKeyframeAnimation 327
Challenge: More Animation 330
For the More Curious: Presentation and Model Layers 330
Chapter 20. Playing Audio and Video 332
Creating the MediaPlayer Application 332
Playing System Sounds 335
Playing Audio Files 339
Playing Movie Files 341
Low-level APIs 344
Challenge: Audio Recording 344
Chapter 21. Web Services 345
Creating the TopSongs Application 345
Settinguptheinterface
347
Fetching Data From a URL 349
WorkingwithNSURLConnection
350
ParsingXML
353
For the More Curious: The Request Body 358
Challenge: More Data 358
For the More Curious: Credentials 358
Chapter 22. Address Book 361
The People Picker 361
Additions to Possession Class 366
Address Book Functions 368
For the More Curious: That Other Delegate Method 372
Chapter 23. Localization 374
Internationalization using NSLocale 375
Localizing Resources 376
NSLocalizedString and Strings Tables 381
Challenge: Another Localization 384
For the More Curious: NSBundle’s Role in Internationalization 384
Chapter 24. Bonjour 386
Publishing a Service 386
Browsing for Services 388
TXT Record 392
Socket Connections 395
Chapter 25. Settings 398
Settings Bundle 398
NSUserDefaults 402
Registeringdefaults
402
Usingthedefaults
403
Chapter 26. SQLite 405