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Ready to build truly stunning apps for iPhone, iPad, and Apple Watch? This cookbook-written exclusively in Swift 3-provides more than 120 proven solutions for tackling the latest features in iOS 10 and watchOS 3. With these code-rich recipes, you'll learn how to build dynamic voice interfaces with Siri and messaging apps with iMessage. You'll also learn how to use interactive maps, multitasking functionality, the UI Testing framework, and many other features.

This cookbook is ideal for intermediate and advanced iOS developers looking to work with the newest versions of Apple's mobile operating systems. Each recipe includes reusable code that´s available on GitHub, so you can put it to work right away.

Let users interact with your apps and services through Siri
Write your own iMessage extensions that allow added interactivity
Work with features in Swift 3, Xcode 8, and Interface Builder
Build standalone apps for Apple Watch
Create vibrant user interfaces with new UIKit features
Use Spotlight APIs to make your app content searchable
Add Picture in Picture playback functionality to iPad apps
Take advantage of MapKit and Core Location updates
Use Apple's new UI Testing framework
Liven up your UI with gravity and turbulence fields

Chapter 1iMessage Stickers and Apps
1.1. Setting Up a Sticker Pack Application
1.2. Adjusting Sticker Sizes
1.3. Building a Full-Fledged iMessage Application
1.4. Adding an iMessage App Extension to an Existing App
1.5. Utilizing an Expanded View in a Sticker Pack App
1.6. Appending Rich Information to Stickers
1.7. Creating Interactive Conversations with iMessage Apps
Chapter 2SiriKit
2.1. Setting Up Your Project for Siri
2.2. Defining an Intent Handler
2.3. Resolving Ambiguity in an Intent
2.4. Reporting Progress for Resolving an Intent
2.5. Handling an Intent
Chapter 3Measurements and Units
3.1. Converting Between and Working with Length Units
3.2. Working with and Switching Between Angle Units
3.3. Representing and Converting Between Durations of Time
3.4. Using and Working with Frequency Units
3.5. Working with and Using Power Units
3.6. Representing and Comparing Temperature Units
3.7. Working with and Converting Volume Units
Chapter 4Core Data
4.1. Designing Your Database Scheme
4.2. Writing Data to the Database
4.3. Reading Data from the Database
4.4. Searching for Data in the Database
4.5. Performing Background Tasks with Core Data
Chapter 5Swift 3.0, Xcode 8, and Interface Builder
5.1. Handling Errors in Swift
5.2. Specifying Preconditions for Methods
5.3. Ensuring the Execution of Code Blocks Before Exiting Methods
5.4. Checking for API Availability
5.5. Categorizing and Downloading Assets to Get Smaller Binaries
5.6. Exporting Device-Specific Binaries
5.7. Linking Separate Storyboards Together
5.8. Adding Multiple Buttons to the Navigation Bar
5.9. Optimizing Your Swift Code
5.10. Showing the Header View of Your Swift Classes
5.11. Creating Your Own Set Types
5.12. Conditionally Extending a Type
5.13. Building Equality Functionality into Your Own Types
5.14. Looping Conditionally Through a Collection
5.15. Designing Interactive Interface Objects in Playgrounds
5.16. Grouping Switch Statement Cases Together
5.17. Bundling and Reading Data in Your Apps
Chapter 6The User Interface
6.1. Animating Views
6.2. Attaching Live Views to Playgrounds
6.3. Running Playgrounds as Interactive and Continuous Apps
6.4. Arranging Your Components Horizontally or Vertically
6.5. Customizing Stack Views for Different Screen Sizes
6.6. Creating Anchored Constraints in Code
6.7. Allowing Users to Enter Text in Response to Local and Remote Notifications
6.8. Dealing with Stacked Views in Code
6.9. Showing Web Content in Safari View Controller
6.10. Laying Out Text-Based Content on Your Views
6.11. Improving Touch Rates for Smoother UI Interactions
6.12. Supporting Right-to-Left Languages
6.13. Associating Keyboard Shortcuts with View Controllers
6.14. Recording the Screen and Sharing the Video
Chapter 7Apple Watch
7.1. Downloading Files onto the Apple Watch
7.2. Noticing Changes in Pairing State Between the iOS and Watch Apps
7.3. Transferring Small Pieces of Data to and from the Watch
7.4. Transferring Dictionaries in Queues to and from the Watch
7.5. Transferring Files to and from the Watch
7.6. Communicating Interactively Between iOS and watchOS
7.7. Setting Up Apple Watch for Custom Complications
7.8. Constructing Small Complications with Text and Images
7.9. Displaying Time Offsets in Complications
7.10. Displaying Dates in Complications
7.11. Displaying Times in Complications
7.12. Displaying Time Intervals in Complications
7.13. Recording Audio in Your Watch App
7.14. Playing Local and Remote Audio and Video in Your Watch App
Chapter 8Contacts
8.1. Creating Contacts
8.2. Searching for Contacts
8.3. Updating Contacts
8.4. Deleting Contacts
8.5. Formatting Contact Data
8.6. Picking Contacts with the Prebuilt System UI
8.7. Creating Contacts with a Prebuilt System UI
8.8. Displaying Contacts with a Prebuilt System UI
Chapter 9Extensions
9.1. Creating Safari Content Blockers
9.2. Creating Shared Links for Safari
9.3. Maintaining Your App's Indexed Content
Chapter 10Web and Search
10.1. Making Your App's Content Searchable
10.2. Making User Activities Searchable
10.3. Deleting Your App's Searchable Content
Chapter 11Multitasking
11.1. Supporting Split Views
11.2. Adding Picture in Picture Playback Functionality
11.3. Handling Low Power Mode and Providing Alternatives
Chapter 12Maps and Location
12.1. Displaying a Specific Location on the Map
12.2. Requesting the User's Location a Single Time
12.3. Requesting the User's Location in the Background
12.4. Customizing the Tint Color of Pins on the Map
12.5. Providing Detailed Pin Information with Custom Views
12.6. Displaying Traffic, Scale, and Compass Indicators on the Map
12.7. Providing an ETA for Transit Transport Type
12.8. Launching the iOS Maps App in Transit Mode
12.9. Showing Maps in Flyover Mode
Chapter 13UI Testing
13.1. Preparing Your Project for UI Testing
13.2. Automating UI Test Scripts
13.3. Testing Text Fields, Buttons, and Labels
13.4. Finding UI Components
13.5. Long-Pressing on UI Elements
13.6. Typing Inside Text Fields
13.7. Swiping on UI Elements
13.8. Tapping UI Elements
Chapter 14Core Motion
14.1. Querying Pace and Cadence Information
14.2. Recording and Reading Accelerometer Data
Chapter 15Security
15.1. Protecting Your Network Connections with ATS
15.2. Binding Keychain Items to Passcode and Touch ID
15.3. Opening URLs Safely
15.4. Authenticating the User with Touch ID and Timeout
Chapter 16Multimedia
16.1. Reading Out Text with the Default Siri Alex Voice
16.2. Downloading and Preparing Remote Media for Playback
16.3. Enabling Spoken Audio Sessions
Chapter 17UI Dynamics
17.1. Adding a Radial Gravity Field to Your UI
17.2. Creating a Linear Gravity Field on Your UI
17.3. Creating Turbulence Effects with Animations
17.4. Adding Animated Noise Effects to Your UI
17.5. Creating a Magnetic Effect Between UI Components
17.6. Designing a Velocity Field on Your UI
17.7. Handling Collisions Between Nonrectangular Views