Apache Flex allows you to build apps that work across many different platforms including mobile platforms such as Android and iOS. Recently, Apple announced that Starting February 1, 2014 any new apps and app updates submitted to the App Store must be built with Xcode 5 and iOS 7. The Adobe AIR team fixed the AIR 4.0 SDK to be compatible with Apple’s new guidelines.
The Apache Flex SDK now allows users to download this new AIR SDK 126.96.36.1999 so that they can continue to build and deploy apps for iOS7.
When installing the new Flex SDK, be sure to select the AIR SDK to at least version 4.0 (you can also use the AIR 13.0 beta version as well), as well as Flash Player 13 from the dropdown list