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