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

While it didn't perfectly answer the question, Shardul's answer is great to rotate the button (2 full rotations). So here it is, converted to Swift 3:

let fullRotation = CABasicAnimation(keyPath: "transform.rotation")
fullRotation.delegate = self
fullRotation.fromValue = NSNumber(floatLiteral: 0)
fullRotation.toValue = NSNumber(floatLiteral: Double(CGFloat.pi * 2))
fullRotation.duration = 0.5
fullRotation.repeatCount = 2
button.layer.add(fullRotation, forKey: "360")

You will need to import QuartzCore:

import QuartzCore

And your ViewController needs to conform to CAAnimationDelegate:

class ViewController: UIViewController, CAAnimationDelegate {

}