UILabel Rotation not working on iOS

Question

I have an IBOutlet UILabel *instructions; I would like to set it vertically with a rotation (via code) and I use this method:

instructions.center = CGPointMake(instructions.frame.origin.x - (instructions.frame.size.height / 2) + instructions.frame.size.height, 
                                       instructions.frame.origin.y - (instructions.frame.size.width / 2) + instructions.frame.size.height);;
CGAffineTransform transform = CGAffineTransformMakeTranslation(0, 0);
transform = CGAffineTransformRotate(transform, -M_PI_2);    
[instructions setTransform:transform];

These instructions work perfectly when I use an old .xib file (Xcode 4.6) for user interface; if I use Storyboard with AutoLayout on iOS 7 and 8 (I'm updating an app), the rotation not work properly and the label is out of the view (see screenshots in the link, the same thing is for segmented controls), but on iOS 6 it works. Any ideas?