RequestedDisplayResolution tag in application descriptor allows the developer to choose between standard or high resolution on iOS devices with high resolution screen. High resolution screens were earlier only available in iPhone and iPod 4th Generation and above. Recently released models on iPad namely iPad 3rd & 4th Generation also boast of a high resolution screen with 2048×1536 resolution. Specifying a ‘high’ value in requestedDisplayResolution tag enables the retina mode in the all iOS devices having the high resolution screen. Prior to AIR 3.6, there was no way to enable or disable retina mode on some specific devices. There existed some workarounds but they came with some trade offs of not able to use the iOS 6 specific features.
A new attribute ‘excludeDevices’ has been added in AIR 3.6 in the requestedDisplayResolution tag in the application descriptor. Developers will now be able to explicitly disable the specified display resolution on one or more iOS devices using this attribute.