Button Rotation Animation in swift to make a similar Animation

You can use a regular rotation on the button:

[myButton setTransform:CGAffineTransformMakeRotation(M_PI_4)];

that would rotat + a 45degrees and make it an X :)

if you want to animate as well try

[UIView animateWithDuration:.5 animations:^{
        myButton.transform = CGAffineTransformMakeRotation(M_PI_4);
    }];

Swift 3:

UIView.animate(withDuration: 0.25, animations: {
    myButton.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
})

More information on rotation in Swift: Swift: How can you rotate text for UIButton and UILabel?