The Advanced iOS 6 Developer’s Cookbook brings together reliable, proven solutions for cutting-edge iOS 6 development. World-renowned iOS expert Erica Sadun covers device-specific development, document/data sharing, Core Text, networking, image processing, onboard cameras, audio, Address Book, Core Location, GameKit,StoreKit, push notifications, and more.   As in her previous bestselling iOS books, Sadun translates today’s development best practices into working code, distilling key concepts into concise recipes that are easy to understand and transfer into your own projects. This isn’t just cut and paste. Using her examples, Sadun fully explains both the “how” and “why” of advanced and specialized iOS 6 development.   All code is tested with iOS 6 features and iPhone, iPad, and iPod touch capabilities. Throughout, every chapter groups related tasks together, so you can jump straight to your solution without having to identify the right class or framework first. Coverage includes   Testing device properties so your app can take full advantage of the iOS unit it’s running on Seamlessly sharing documents and data across apps and moving control between apps Presenting exceptionally attractive text with freeform text typesetting Building touch-based apps that leverage Bezier curves, splines, and other geometric tools Securing network apps via authentication, system keychains, and OAuth Accessing and processing image data to create special effects Integrating live camera feeds and user snapshots Presenting audio to users and enabling them to interact with it Effectively using Address Book frameworks and GUI classes Building advanced location apps with Core Location geopositioning and MapKit Creating connected game play with GameKit/Game Center: device-to-device networking, shared leaderboards, and Internet-based matches Integrating secure in-app purchasing with StoreKit Communicating with users from web-based services via push notifications

Table of Contents:
Preface   xiii 1 Device-Specific Development   1 Accessing Basic Device Information   1 Adding Device Capability Restrictions   2 Recipe: Checking Device Proximity and Battery States   5 Recipe: Recovering Additional Device Information   9 Recipe: Using Acceleration to Locate “Up”   11 Working with Basic Orientation   12 Retrieving the Current Accelerometer Angle Synchronously   13 Recipe: Using Acceleration to Move Onscreen Objects   16 Recipe: Accelerometer-Based Scroll View   19 Recipe: Core Motion Basics   21 Recipe: Retrieving and Using Device Attitude   26 Detecting Shakes Using Motion Events   27 Recipe: Using External Screens   29 Tracking Users   35 One More Thing: Checking for Available Disk Space  35 Summary   36 2 Documents and Data Sharing   39 Recipe: Working with Uniform Type Identifiers   39 Recipe: Accessing the System Pasteboard   45 Recipe: Monitoring the Documents Folder   48 Recipe: Presenting the Activity View Controller   54 Recipe: The Quick Look Preview Controller   63 Recipe: Adding a QuickLook Action   66 Recipe: Using The Document Interaction Controller   69 Recipe: Declaring Document Support   75 Recipe: Creating URL-Based Services   82 Summary   84 3 Core Text   87 Core Text and iOS   87 Attributed Strings   89 Recipe: Basic Attributed Strings   93 Recipe: Mutable Attributed Strings   95 The Mystery of Responder Styles   98 Recipe: Attribute Stacks   100 Recipe: Using Pseudo-HTML to Create Attributed Text   105 Drawing with Core Text   109 Creating Image Cut-Outs   112 Recipe: Drawing Core Text onto a Scroll View   114 Recipe: Exploring Fonts   116 Adding Custom Fonts to Your App   118 Recipe: Splitting Core Text into Pages   119 Recipe: Drawing Attributed Text into a PDF   120 Recipe: Big Phone Text   122 Summary   125 4 Geometry   127 Recipe: Retrieving Points from Bezier Paths   127 Recipe: Thinning Points   129 Recipe: Smoothing Drawings   132 Recipe: Velocity-Based Stroking   135 Recipe: Bounding Bezier Paths   137 Recipe: Fitting Paths   142 Working with Curves   144 Recipe: Moving Items Along a Bezier Path   148 Recipe: Drawing Attributed Text Along a Bezier Path   151 Recipe: View Transforms   154 Recipe: Testing for View Intersection   161 Summary   166 5 Networking   167 Recipe: Secure Credential Storage   167 Recipe: Entering Credentials   171 Recipe: Handling Authentication Challenges   176 Recipe: Uploading Data   177 Recipe: Building a Simple Web Server   181 Recipe: OAuth Utilities   184 Recipe: The OAuth Process   188 Summary   196 6 Images   197 Image Sources   197 Reading Image Data   199 Recipe: Fitting and Filling Images   203 Recipe: Rotating Images   208 Recipe: Working with Bitmap Representations   210 Recipe: Basic Image Processing   215 Recipe: Image Convolution   216 Recipe: Basic Core Image Processing   219 Capturing View-Based Screen Shots   221 Drawing into PDF Files   222 Recipe: Reflection   223 Recipe: Emitters   226 Summary   228 7 Cameras   229 Recipe: Snapping Photos   229 Recipe: Enabling a Flashlight   233 Recipe: Accessing the AVFoundation Camera   235 Recipe: EXIF   242 Image Orientations   247 Recipe: Core Image Filtering   249 Recipe: Core Image Face Detection   251 Recipe: Sampling a Live Feed   257 Summary   260 8 Audio   261 Recipe: Playing Audio with AVAudioPlayer   261 Recipe: Looping Audio   269 Recipe: Handling Audio Interruptions   272 Recipe: Recording Audio   274 Recipe: Recording Audio with Audio Queues   280 Recipe: Picking Audio with the MPMediaPickerController   286 Creating a Media Query   288 Recipe: Using the MPMusicPlayerController   290 Summary   294 9 Connecting to the Address Book   297 The AddressBook Frameworks   297 Recipe: Searching the Address Book   322 Recipe: Accessing Contact Image Data   325 Recipe: Picking People   326 Recipe: Limiting Contact Picker Properties   329 Recipe: Adding and Removing Contacts   331 Modifying and Viewing Individual Contacts   334 Recipe: The “Unknown” Person Controller   335 Summary   338 10 Location   339 Authorizing Core Location   339 Recipe: Core Location in a Nutshell   344 Recipe: Geofencing     348 Recipe: Keeping Track of “North” by Using Heading Values   350 Recipe: Forward and Reverse Geocoding   353 Recipe: Viewing a Location   355 Recipe: User Location Annotations   360 Recipe: Creating Map Annotations   363 Summary   369 11 GameKit   371 Enabling Game Center   371 Recipe: Signing In to Game Center   373 Designing Leaderboards and Achievements   375 Recipe: Accessing Leaderboards   378 Recipe: Displaying the Game Center View Controller   380 Recipe: Submitting Scores   381 Recipe: Checking Achievements   382 Recipe: Reporting Achievements to Game Center   383 Recipe: Multiplayer Matchmaking   385 Recipe: Responding to the Matchmaker   387 Recipe: Creating an Invitation Handler   388 Managing Match State     390 Recipe: Handling Player State Changes   390 Recipe: Retrieving Player Names   392 Game Play   393 Serializing Data   394 Recipe: Synchronizing Data   397 Recipe: Turn-by-Turn Matchmaking   399 Recipe: Responding to Turn-Based Invitations  401 Recipe: Loading Matches   402 Recipe: Responding to Game Play   403 Recipe: Ending Gameplay   407 Recipe: Removing Matches   410 Recipe: Game Center Voice   411 GameKit Peer Services   415 Summary   425 12 StoreKit   427 Getting Started with StoreKit   427 Creating Test Accounts   430 Creating New In-App Purchase Items   431 Building a Storefront GUI   435 Purchasing Items   438 Validating Receipts   443 Summary   445 13 Push Notifications   447 Introducing Push Notifications   447 Provisioning Push   451 Registering Your Application   454 Recipe: Push Client Skeleton   458 Building Notification Payloads   465 Recipe: Sending Notifications   466 Feedback Service   471 Designing for Push   473 Summary     473 Index   475