Learning Swift Building Apps for OSX, iOS, and Beyond

529 Pages·2017·23.51 MB·English

by  Jon Manning

Learning Swift 3
Jon Manning, Paris Buttfield-Addison, and Tim Nugent
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Learning Swift 3
by Paris Buttfield-Addison , Jon Manning , and Tim Nugent
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Table of Contents
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Part I. Swift Basics
1. Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
The Apple Developer Program 5
Registering for the Apple Developer Program 6
Downloading Xcode 7
Creating Your First Project with Xcode 8
The Xcode Interface 12
Developing a Simple Swift Application 20
Designing the Interface 21
Connecting the Code 22
Using the iOS Simulator 24
Conclusion 26
2. The Basics of Swift. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
The Swift Programming Language 28
Swift 2 Versus Swift 3 30
Playgrounds 31
Comments 32
Variables and Constants 33
Operators 34
Control Flow 35
Loops 36
Switches 37
Types 40
iii
Working with Strings 40
Comparing Strings 41
Searching Strings 42
Optional Types 42
Type Casting 44
Tuples 45
Arrays 46
Dictionaries 48
Enumerations 48
Sets 50
Functions and Closures 51
Using Functions as Variables 54
Closures 56
The defer Keyword 58
The guard Keyword 58
Making your code Swifty 59
Conclusion 59
3. Swift for Object-Oriented App Development. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Classes and Objects 61
Initialization and Deinitialization 63
Properties 64
Inheritance 64
Protocols 68
Extensions 69
Access Control 70
Operator Overloading 72
Generics 73
Subscripts 74
Structures 75
Modules 76
The Swift Standard Library, Foundation, Cocoa, and Cocoa Touch 76
Swift Package Manager 77
Data 79
Loading Data from Files and URLs 79
Serialization and Deserialization 80
Error Handling 81
Memory Management 84
Design Patterns in Cocoa and Cocoa Touch 85
Model-View-Controller 85
Delegation 87
Structuring an App 89
iv | Table of Contents
The Application Delegate 89
Window Controllers and View Controllers 89
Nibs and Storyboards 90
Conclusion 90
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Part II. An OS X App
4. Setting Up the OS X Notes App. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Designing the OS X Notes App 124
Creating the OS X Project 127
Defining a Document Type 132
Adding the Icon 136
Conclusion 138
5. Working with Documents on OS X. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
The NSDocument Class 139
Storing Data in the Document 140
Storing Text 141
Package File Formats 142
The guard Keyword, and Why It’s Great 147
Saving Files 148
Loading Files 151
A Basic UI 154
Conclusion 162
6. User Interfaces and iCloud. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Updating the UI 163
Document-Filetype-Extension UI 167
Getting an Icon for the Collection View Cells 172
Adding Attachments 174
Storing and Managing Attachments 182
Displaying Data in the Collection View 190
Enhancing Attachments 193
Opening Attachments 193
JSON Attachments 197
Adding Attachments via Drag-and-Drop 202
Adding QuickLook 207
iCloud 213
The Basics of iCloud 214
Table of Contents | v
Conclusion 217
Part III. An iOS App
7. Setting Up the iOS Notes App. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Designing the iOS Notes App 222
Creating the iOS Project 228
Enabling the iOS App for iCloud 232
Defining a Document Type 236
Conclusion 238
8. Working with Files in iCloud. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
The App Sandbox 239
iCloud Availability 241
Creating the Document List View Controller 242
View Controllers and Storyboards 244
The Navigation Controller 244
Collection Views 248
Using Constraints to Control Size and Position 250
Creating the Document Class 254
Listing Documents 260
Creating Documents 270
Downloading from iCloud 272
Deleting Documents 276
Renaming Documents 283
Conclusion 286
9. Working with Documents on iOS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Adding a View to Display Notes 289
Editing and Saving Documents 297
Conclusion 299
10. Working with Files and File Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Setting Up the Interface for Attachments 301
Listing Attachments 305
Determining Types of Attachments 307
Displaying Attachment Cells 310
Dealing with Conflicts 316
Creating the Quick Look Thumbnail 322
Conclusion 325
vi | Table of Contents
11. Images and Deletion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Adding Attachments 327
Adding Image Attachments 329
Viewing Attachments 335
Deleting Attachments 346
Conclusion 353
12. Supporting the iOS Ecosystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Sharing with UIActivityController 355
Handoffs 358
Searchability 363
Conclusion 365
13. Extending iOS Apps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367
Searching with a Spotlight Indexing Extension 368
Conclusion 378
14. Multimedia and Location attachments]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
Audio Attachments 379
Video Attachments 392
Location Attachment 400
Conclusion 404
15. Polishing the iOS App. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
Opening Links in SFSafariViewController 405
3D Touch 409
Home Screen Quick Actions 410
Peek and Pop 413
Settings 414
Undo Support 416
Images with Filters 419
Worldwide Apps 423
Internationalization 424
Localization 427
Accessibility 432
Splitscreen Multitasking 437
Conclusion 438
Table of Contents | vii
Part IV. Extending Your Apps
16. Building a watchOS App. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441
Designing for the Watch 442
Designing Our watchOS App 444
Creating the watchOS Extension 446
Communicating with the iPhone 450
User Interfaces for the Apple Watch 469
Showing Note Contents 475
Creating New Notes 482
Adding Handoff Between the Watch and the iPhone 485
Glances 490
Conclusion 494
17. Code Quality and Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495
Debugging 495
Instruments 498
Testing 503
Unit Testing 504
UI Testing 506
Using Objective-C and Swift in the Same Project 508
Using Swift Objects in Objective-C 508
Using Objective-C Objects in Swift 509
The App Store 510
App Thinning 511
Testing iOS Apps with TestFlight 512
Conclusion 513
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