iOS 7应用开发入门指南

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《iOS7 App Development Essentials》是一本专为iOS 7和Xcode 5新手以及有一定经验的iOS 6开发者编写的入门书籍。本书的首要目标是帮助读者掌握iOS 7应用程序开发的基础知识，以适应苹果公司的最新技术和平台变化。作者Neil Smyth确保了内容针对iOS 7的新特性和API进行了详尽的讲解，适合那些希望提升技能或初次接触iOS开发的读者。对于新iOS开发者，章节1（Start Here）旨在提供一个全面的入门指南，介绍了iOS开发的基本概念、环境设置以及如何使用Swift或Objective-C这两种主要编程语言。该部分可能涵盖了故事板设计、视图控制器、数据存储和网络请求等基础知识，帮助读者建立坚实的开发基础。对于已经熟悉iOS 6的开发者，章节1.2将着重于向他们介绍iOS 7的新特性，比如新的用户界面设计、改进的动画效果、以及API升级，旨在帮助他们在快速变化的平台上保持竞争力。源代码下载部分（1.3）提供了实践学习的机会，让读者可以直接查看和运行书中的示例代码，以便更快地理解和应用理论知识。此外，作者还鼓励读者提供反馈（1.4），以便不断更新和完善内容，确保信息的准确性和时效性。书中还包含了关于苹果iOS开发者计划的介绍（2.1），指导读者如何注册成为合法的Apple Developer，并下载Xcode和iOS 7软件开发工具包（SDK），这对于任何想要在App Store上发布应用的人来说都是必不可少的步骤。最后，1.5部分列出了可能存在的错误和遗漏，以便读者及时修正，保证学习的连贯性和有效性。《iOS7 App Development Essentials》是一本既适合初学者入门，也适合有一定经验开发者提升的实用教程，内容丰富，针对性强，对于iOS开发者来说是一份宝贵的参考资料。

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41.2 Managed Objects ............................................................................................................. 366

41.3 Managed Object Context ................................................................................................. 366

41.4 Managed Object Model .................................................................................................... 367

41.5 Persistent Store Coordinator ............................................................................................ 367

41.6 Persistent Object Store..................................................................................................... 368

41.7 Defining an Entity Description .......................................................................................... 368

41.8 Obtaining the Managed Object Context .......................................................................... 369

41.9 Getting an Entity Description ........................................................................................... 370

41.10 Creating a Managed Object ............................................................................................ 370

41.11 Getting and Setting the Attributes of a Managed Object .............................................. 370

41.12 Fetching Managed Objects ............................................................................................. 371

41.13 Retrieving Managed Objects based on Criteria .............................................................. 371

41.14 Summary ........................................................................................................................ 372

42. An iOS 7 Core Data Tutorial ............................................................................................... 373

42.1 The Core Data Example Application ................................................................................. 373

42.2 Creating a Core Data based Application ........................................................................... 373

42.3 Creating the Entity Description ........................................................................................ 373

42.4 Adding a Storyboard to the Project .................................................................................. 375

42.5 Adding a View Controller .................................................................................................. 376

42.6 Designing the User Interface ............................................................................................ 376

42.7 Saving Data to the Persistent Store using Core Data ....................................................... 378

42.8 Retrieving Data from the Persistent Store using Core Data ............................................. 379

42.9 Building and Running the Example Application................................................................ 380

42.10 Summary ........................................................................................................................ 381

43. An Overview of iOS 7 Multitouch, Taps and Gestures ....................................................... 383

43.1 The Responder Chain ....................................................................................................... 383

43.2 Forwarding an Event to the Next Responder ................................................................... 384

43.3 Gestures ........................................................................................................................... 384

43.4 Taps .................................................................................................................................. 384

43.5 Touches ............................................................................................................................ 385

43.6 Touch Notification Methods ............................................................................................. 385

43.6.1 touchesBegan method .............................................................................................. 385

43.6.2 touchesMoved method ............................................................................................. 385

43.6.3 touchesEnded method .............................................................................................. 385

43.6.4 touchesCancelled method ......................................................................................... 386

43.7 Summary .......................................................................................................................... 386

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44. An Example iOS 7 Touch, Multitouch and Tap Application ................................................ 387

44.1 The Example iOS 7 Tap and Touch Application ................................................................ 387

44.2 Creating the Example iOS Touch Project .......................................................................... 387

44.3 Designing the User Interface ............................................................................................ 387

44.4 Enabling Multitouch on the View ..................................................................................... 389

44.5 Implementing the touchesBegan Method ....................................................................... 389

44.6 Implementing the touchesMoved Method ...................................................................... 390

44.7 Implementing the touchesEnded Method ....................................................................... 390

44.8 Getting the Coordinates of a Touch ................................................................................. 391

44.9 Building and Running the Touch Example Application ..................................................... 391

45. Detecting iOS 7 Touch Screen Gesture Motions ................................................................ 393

45.1 The Example iOS 7 Gesture Application ........................................................................... 393

45.2 Creating the Example Project ........................................................................................... 393

45.3 Designing the Application User Interface ......................................................................... 393

45.4 Implementing the touchesBegan Method ....................................................................... 395

45.5 Implementing the touchesMoved Method ...................................................................... 395

45.6 Implementing the touchesEnded Method ....................................................................... 396

45.7 Building and Running the Gesture Example ..................................................................... 396

45.8 Summary .......................................................................................................................... 396

46. Identifying Gestures using iOS 7 Gesture Recognizers ....................................................... 397

46.1 The UIGestureRecognizer Class ........................................................................................ 397

46.2 Recognizer Action Messages ............................................................................................ 398

46.3 Discrete and Continuous Gestures ................................................................................... 398

46.4 Obtaining Data from a Gesture ........................................................................................ 398

46.5 Recognizing Tap Gestures ................................................................................................ 399

46.6 Recognizing Pinch Gestures .............................................................................................. 399

46.7 Detecting Rotation Gestures ............................................................................................ 399

46.8 Recognizing Pan and Dragging Gestures .......................................................................... 400

46.9 Recognizing Swipe Gestures ............................................................................................. 400

46.10 Recognizing Long Touch (Touch and Hold) Gestures ..................................................... 401

46.11 Summary ........................................................................................................................ 401

47. An iOS 7 Gesture Recognition Tutorial .............................................................................. 403

47.1 Creating the Gesture Recognition Project ........................................................................ 403

47.2 Designing the User Interface ............................................................................................ 403

47.3 Implementing the Action Methods .................................................................................. 406

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47.4 Testing the Gesture Recognition Application ................................................................... 407

48. An Overview of iOS 7 Collection View and Flow Layout .................................................... 409

48.1 An Overview of Collection Views...................................................................................... 409

48.2 The UICollectionView Class .............................................................................................. 412

48.3 The UICollectionViewCell Class ........................................................................................ 412

48.4 The UICollectionReusableView Class ................................................................................ 413

48.5 The UICollectionViewFlowLayout Class ............................................................................ 413

48.6 The UICollectionViewLayoutAttributes Class ................................................................... 414

48.7 The UICollectionViewDataSource Protocol ...................................................................... 414

48.8 The UICollectionViewDelegate Protocol .......................................................................... 415

48.9 The UICollectionViewDelegateFlowLayout Protocol ........................................................ 416

48.10 Cell and View Reuse ....................................................................................................... 417

48.11 Summary ........................................................................................................................ 419

49. An iOS 7 Storyboard-based Collection View Tutorial ......................................................... 421

49.1 Creating the Collection View Example Project ................................................................. 421

49.2 Removing the Template View Controller ......................................................................... 421

49.3 Adding a Collection View Controller to the Storyboard ................................................... 422

49.4 Adding the Collection View Cell Class to the Project ........................................................ 424

49.5 Designing the Cell Prototype ............................................................................................ 424

49.6 Implementing the Data Model ......................................................................................... 426

49.7 Implementing the Data Source ........................................................................................ 428

49.8 Testing the Application ..................................................................................................... 430

49.9 Setting Sizes for Cell Items ............................................................................................... 431

49.10 Changing Scroll Direction ............................................................................................... 433

49.11 Implementing a Supplementary View ............................................................................ 435

49.12 Implementing the Supplementary View Protocol Methods ........................................... 438

49.13 Deleting Collection View Items ...................................................................................... 439

49.14 Summary ........................................................................................................................ 440

50. Subclassing and Extending the iOS 7 Collection View Flow Layout .................................... 441

50.1 About the Example Layout Class ...................................................................................... 441

50.2 Subclassing the UICollectionViewFlowLayout Class ......................................................... 442

50.3 Extending the New Layout Class ...................................................................................... 442

50.4 Implementing the layoutAttributesForItemAtIndexPath: Method .................................. 443

50.5 Implementing the layoutAttributesForElementsInRect: Method .................................... 444

50.6 Implementing the modifyLayoutAttributes: Method ....................................................... 445

50.7 Adding the New Layout and Pinch Gesture Recognizer ................................................... 446

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50.8 Implementing the Pinch Recognizer ................................................................................. 447

50.9 Avoiding Image Clipping ................................................................................................... 450

50.10 Testing the Application ................................................................................................... 450

50.11 Summary ........................................................................................................................ 451

51. Drawing iOS 7 2D Graphics with Core Graphics ................................................................. 453

51.1 Introducing Core Graphics and Quartz 2D........................................................................ 453

51.2 The drawRect Method ...................................................................................................... 453

51.3 Points, Coordinates and Pixels ......................................................................................... 454

51.4 The Graphics Context ....................................................................................................... 454

51.5 Working with Colors in Quartz 2D .................................................................................... 455

51.6 Summary .......................................................................................................................... 456

52. An iOS 7 Graphics Tutorial using Core Graphics and Core Image ....................................... 457

52.1 The iOS Drawing Example Application ............................................................................. 457

52.2 Creating the New Project ................................................................................................. 457

52.3 Creating the UIView Subclass ........................................................................................... 457

52.4 Locating the drawRect Method in the UIView Subclass ................................................... 458

52.5 Drawing a Line .................................................................................................................. 459

52.6 Drawing Paths .................................................................................................................. 462

52.7 Drawing a Rectangle ......................................................................................................... 463

52.8 Drawing an Ellipse or Circle .............................................................................................. 464

52.9 Filling a Path with a Color ................................................................................................. 465

52.10 Drawing an Arc ............................................................................................................... 467

52.11 Drawing a Cubic Bézier Curve ......................................................................................... 468

52.12 Drawing a Quadratic Bézier Curve .................................................................................. 469

52.13 Dashed Line Drawing ...................................................................................................... 470

52.14 Drawing Shadows ........................................................................................................... 472

52.15 Drawing Gradients .......................................................................................................... 473

52.16 Drawing an Image into a Graphics Context .................................................................... 478

52.17 Image Filtering with the Core Image Framework ........................................................... 480

52.18 Summary ........................................................................................................................ 482

53. Basic iOS 7 Animation using Core Animation..................................................................... 483

53.1 UIView Core Animation Blocks ......................................................................................... 483

53.2 Understanding Animation Curves .................................................................................... 484

53.3 Receiving Notification of Animation Completion ............................................................. 485

53.4 Performing Affine Transformations.................................................................................. 485

53.5 Combining Transformations ............................................................................................. 486

53.6 Creating the Animation Example Application .................................................................. 486

53.7 Implementing the Interface File ....................................................................................... 486

53.8 Drawing in the UIView ...................................................................................................... 487

53.9 Detecting Screen Touches and Performing the Animation .............................................. 487

53.10 Building and Running the Animation Application .......................................................... 489

53.11 Summary ........................................................................................................................ 490

54. iOS 7 UIKit Dynamics – An Overview ................................................................................. 491

54.1 Understanding UIKit Dynamics ......................................................................................... 491

54.2 The UIKit Dynamics Architecture...................................................................................... 492

54.2.1 Dynamic Items .......................................................................................................... 492

54.2.2 Dynamic Behaviors .................................................................................................... 492

54.2.3 The Reference View ................................................................................................... 493

54.2.4 The Dynamic Animator ............................................................................................. 493

54.3 Implementing UIKit Dynamics in an iOS 7 Application ..................................................... 494

54.4 Dynamic Animator Initialization ....................................................................................... 494

54.5 Configuring Gravity Behavior ........................................................................................... 495

54.6 Configuring Collision Behavior ......................................................................................... 496

54.7 Configuring Attachment Behavior .................................................................................... 498

54.8 Configuring Snap Behavior ............................................................................................... 500

54.9 Configuring Push Behavior ............................................................................................... 500

54.10 The UIDynamicItemBehavior Class ................................................................................. 502

54.11 Combining Behaviors to Create a Custom Behavior....................................................... 503

54.12 Summary ........................................................................................................................ 504

55. An iOS 7 UIKit Dynamics Tutorial ...................................................................................... 505

55.1 Creating the UIKit Dynamics Example Project .................................................................. 505

55.2 Adding the Dynamic Items ............................................................................................... 505

55.3 Creating the Dynamic Animator Instance ........................................................................ 507

55.4 Adding Gravity to the Views ............................................................................................. 508

55.5 Implementing Collision Behavior ..................................................................................... 509

55.6 Attaching a View to an Anchor Point................................................................................ 511

55.7 Implementing a Spring Attachment Between two Views ................................................ 514

55.8 Summary .......................................................................................................................... 515

56. An Introduction to iOS 7 Sprite Kit Programming .............................................................. 517

56.1 What is Sprite Kit? ............................................................................................................ 517

56.2 The Key Components of a Sprite Kit Game ...................................................................... 518

56.2.1 Sprite Kit View ........................................................................................................... 518

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