Rotating UIButton

Question

I\'ve been trying to rotate a button using the following method:

-(IBAction)rotate:(id)sender{
    CGPoint pencilCenter = pencil.center;
    [pencil setCente         


        

Answer 1

Well, the docs say: "...the specified animations are started immediately on another thread ...". Now, all UIKit code is NOT thread safe. So, maybe it helps if instead calling your UI setters (setTransform, setCenter) from the completion block (which runs in a separate thread) to call them using performSelectorOnMainThread:withObject:.