WWDC 2012 Session 405: Modern Objective-C by Patrick C. Beard


Objective-C is the language of choice for building great iOS and OS X apps. Dive deep into the latest advancements in Objective-C, learn how you can write more concise and less error-prone code, and find out about the advancements in Automatic Reference Counting.

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WWDC 2012 Session 413: Migrating to Modern Objective-C by Malcolm Crawford


Objective-C has evolved tremendously in recent years. In this tutorial-style session, learn how the latest features in Objective-C work together to dramatically reduce the amount of code you write, while simultaneously creating cleaner, safer, and better structured code.

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WWDC 2012 Session 308: Managing Subscriptions with In-App Purchase by David Neumann and Aubrey Ness


Selling subscriptions to content and services has never been easier than with In-App Purchase. Understand what each subscription type is, what you can use them for and gain insight into how to best manage your subscriptions in iTunes Connect. Learn from the experts on how making changes to your subscriptions are seen by users and how they affect things like renewals and restoring transactions to devices.

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WWDC 2012 Session 409: Learning Instruments by David M. O’Rourke


Instruments is Apple’s premiere tool for analyzing the performance of iOS and OS X applications. Watch the experts reveal deep performance issues and explain the collected data. Learn critical skills that will help you find memory leaks, improve network efficiency, and display the smoothest graphics possible. A must-attend session for anyone looking to better use Instruments.

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WWDC 2012 Session 217: Layer-Backed Views: AppKit + Core Animation by Corbin Dunn


Learn how to effectively use layer-backed views in AppKit to get smooth animations and fast performance. See how to take advantage of new Mountain Lion enhancements added to NSView, especially for updating Core Animation layers.

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