iOS 5开发者指南：技术实战与深度解析

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《Addison.Wesley The iOS 5 Developers Cookbook 3rd Edition》（2012年1月出版）是一本专为iOS 5开发者打造的权威指南。本书由业界知名的作者Erica Sadun编写，旨在深度解析并提供实用的开发技巧，帮助读者更高效地进行iPhone应用程序开发。在前一版的赞誉中，Tim Burks，一位iPhone软件开发者，高度评价这本书的价值，称其“性价比极高”，能够节省开发时间。书中包含众多清晰、实用的示例，不仅涵盖基础iPhone开发技术，还展示了超越官方文档的特殊效果，对于开发者来说是极其宝贵的资源。 Jacqui Cheng，Ars Technica的副编辑，认为Erica Sadun的技术能力完全符合Addison-Wesley出版社的高标准。《The iPhone Developer's Cookbook》是一本全面的教程，无论你是初学者还是经验丰富的开发者，都能从中受益匪浅。书中丰富的代码示例和截图，配合详尽的提示与窍门，使得技术讲解既亲切又专业。 Daniel Pasco，Black Pixel Luminance的首席开发人员和CEO，则将这本书比喻为iOS开发者领域的“Petzold书籍”，意指其在讲解技术主题方面的深度和清晰度。他本人作为行业从业者，也被Erica的专业知识和教材呈现方式所折服，其内容既通俗易懂又技术严谨。《Addison.Wesley The iOS 5 Developers Cookbook 3rd Edition》是一本实用且深入的iOS 5开发指南，无论是为了学习新技术，还是解决实际开发问题，都是开发者书架上不可或缺的一本书。它不仅提供了大量的实战代码，还涵盖了从基础知识到高级技巧的全方位内容，有助于提升开发者的技能和效率。对于希望进入或深化iOS开发领域的人来说，这是一本值得投入时间和精力研读的权威参考书。

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ptg7481383
xv
Contents
Recipe: Scrubbing Pages in a Page View Controller 269
Recipe: Tab Bars 271
Recipe: Remembering Tab State 275
Recipe: Building Split View Controllers 278
Recipe: Creating Universal Split View/Navigation 
Apps 282
Recipe: Custom Containers and Segues 284
Transitioning   B e t ween  V iew  Controller s 290
One More Thing: Interface Builder and Tab 
Bar Controllers 291
Summary 292
6 Assembling Views and Animations 295
View Hierarchies 295
Recipe: Recovering a View Hierarchy Tree 297
Recipe: Querying Subviews 298
Managing Subviews 300
Adding Subviews 300
Reordering and Removing Subviews 300
View Callbacks 301
Recipe: Tagging and Retrieving Views 301
Using Tags to Find Views 302
Recipe: Naming Views 303
Associated Objects 304
Using a Name Dictionary 305
View Geometry 308
Frames 309
Transfor m s 310
Coordinate Systems 310
Recipe: Working with View Frames 311
Adjusting Sizes 312
CGRects and Centers 313
Other Utility Methods 314
Recipe: Randomly Moving a Bounded View 318
Recipe: Transforming Views 319
Display and Interaction Traits 320

ptg7481383
xvi
Contents
UIView Animations 321
Building UIView Animation Transactions 322
Building Animations with Blocks 323
Conditional Animation 324
Recipe: Fading a View In and Out 324
Recipe: Swapping Views 326
Recipe: Flipping Views 327
Recipe: Using Core Animation Transitions 328
Recipe: Bouncing Views as They Appear 329
Recipe: Image View Animations 331
One More Thing: Adding Reflections to Views 332
Summary 335
7 Working with Images 337
Finding and Loading Images 337
Reading Image Data 339
Recipe: Accessing Photos from the iOS 
Photo Album 342
Working with the Image Picker 342
Recovering Image Edit Information 344
Recipe: Retrieving Images from Asset URLs 347
Recipe: Snapping Photos and Writing Them 
to the Photo Album 349
Choosing Between Cameras 351
Saving Pictures to the Documents Folder 353
Recipe: E-mailing Pictures 354
Creating Message Contents 354
Presenting the Composition Controller 356
Automating Camera Shots 358
Using a Custom Camera Overlay 358
Recipe: Accessing the AVFoundation Camera 359
Requiring Cameras 360
Querying and Retrieving Cameras 360
Establishing a Camera Session 361
Switching Cameras 363
Camera Previews 364

ptg7481383
xvii
Contents
Laying Out a Camera Preview 364
EXIF 365
Image Geometry 365
Building Camera Helper 367
Recipe: Adding a Core Image Filter 368
Recipe: Core Image Face Detection 370
Extracting Faces 376
Recipe: Working with Bitmap Representations 377
Drawing into a Bitmap Context 378
Applying Image Processing 380
Image Processing Realities 382
Recipe: Sampling a Live Feed 384
Converting to HSB 386
Recipe: Building Thumbnails from Images 387
Taking  V iew-based  Screensh o t s 390
Drawing into PDF Files 390
Creating New Images from Scratch 391
Recipe: Displaying Images in a Scrollable View 392
Creating a Multi-Image Paged Scroll 395
Summary 396
8 Gestures and Touches 397
Touches 397
Phases 398
Touches  and  Resp o n d e r  Methods 399
Touching  V iews 399
Multitouch 400
Gesture Recognizers 400
Recipe: Adding a Simple Direct Manipulation 
Interface 401
Recipe: Adding Pan Gesture Recognizers 402
Recipe: Using Multiple Gesture Recognizers 
at Once 404
Resolving Gesture Conflicts 407
Recipe: Constraining Movement 408
Recipe: Testing Touches 409
Recipe: Testing Against a Bitmap 411

ptg7481383
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Contents
Recipe: Adding Persistence to Direct Manipulation
Interfaces 413
Storing State 413
Recovering State 415
Recipe: Persistence Through Archiving 416
Recipe: Adding Undo Support 418
Creating an Undo Manager 418
Child-View Undo Support 418
Working with Navigation Bars 419
Registering Undos 420
Adding Shake-Controlled Undo Support 422
Add an Action Name for Undo and Redo 
(Optional) 422
Provide Shake-To-Edit Support 423
Force First Responder 423
Recipe: Drawing Touches Onscreen 424
Recipe: Smoothing Drawings 426
Recipe: Detecting Circles 429
Creating a Custom Gesture Recognizer 433
Recipe: Using Multitouch 435
Retaining Touch Paths 438
One More Thing: Dragging from a Scroll View 440
Summary 443
9 Building and Using Controls 445
The UIControl Class 445
Kinds of Controls 445
Control Events 446
Buttons 448
Adding Buttons in Interface Builder 449
Art 450
Connecting Buttons to Actions 451
Buttons That Are Not Buttons 452
Building Custom Buttons in Xcode 453
Multiline Button Text 455
Adding Animated Elements to Buttons 456
Recipe: Animating Button Responses 456

ptg7481383
xix
Contents
Recipe: Adding a Slider With a Custom Thumb 458
Customizing UISlider 459
Adding Efficiency 460
Appearance Proxies 460
Recipe: Creating a Twice-Tappable Segmented 
Control 465
Recipe: Subclassing UIControl 467
Creating UIControls 468
Tracking  Touche s 468
Dispatching Events 468
Working with Switches and Steppers 471
Recipe: Building a Star Slider 472
Recipe: Building a Touch Wheel 476
Adding a Page Indicator Control 478
Recipe: Creating a Customizable Paged Scroller 481
Building a Toolbar 486
Building Toolbars in Code 487
iOS 5 Toolbar Tips 489
Summary 489
10 Working with Text 491
Recipe: Dismissing a UITextField Keyboard 491
Text  Trait  Proper ties 492
Other Text Field Properties 493
Recipe: Adjusting Views Around Keyboards 495
Recipe: Dismissing Text Views with Custom 
Accessory Views 498
Recipe: Resizing Views with Hardware Keyboards 500
Recipe: Creating a Custom Input View 503
Recipe: Making Text-Input-Aware Views 508
Recipe: Adding Custom Input Views to Non-Text 
Views 511
Adding Input Clicks 511
Recipe: Building a Better Text Editor 513
Recipe: Text Entry Filtering 516
Recipe: Detecting Text Patterns 518
Rolling Your Own Expressions 518