UIKit in Release Notes for iOS 7.1 Beta2
UILabelthat is baseline aligned with constraints has attributes that change after the constraints have been added, the layout may be incorrect. The exception to this is
UILabel, which should work as expected.
Workaround: Avoid making changes in
UILabelafter adding baseline-alignment constraints. If you must make changes, you should remove the constraints and then reapply them afterward. Note that this is a performance hit, so don’t do it unless it is necessary.
backIndicatorTransitionMaskfrom a storyboard or a xib will not be interpreted correctly at runtime.
Workaround: Set the