a05b3497_iOS_Keys_Table_1_Summary_of_UIKit_keys_Summary
[Key] UIViewEdgeAntialiasing [Xcode name] “Renders with edge antialiasing” [Availability] iOS 3.0 and later [Summary] 
Specifies whether Core Animation layers use antialiasing when drawing does not align to pixel boundaries. See UIViewEdgeAntialiasing for details.
iOS Keys