? ?Lynda出品的iOS 4 App Development New Features : 第三方应用程序开发新功能教程.

? ?Topics include:?

? ? ? ?Multitasking in iOS4
? ? ? ?Using the Event Kit framework
? ? ? ?Multithreading with blocks and Grand Central Dispatch
? ? ? ?Using iAd
? ? ? ?Playing and recording video from an application
? ? ? ?Detecting device capabilities
? ? ? ?Upgrading existing projects