Rotate UIButton 360 degrees

Question

I\'ve been trying to run an animation that rotates my UIButton 360 degrees using this code:

UIView.animateWithDuration(3.0, animations: {
  self.vin         


        

Answer 1

You can use a little extension based on CABasicAnimation (Swift 4.x):

extension UIButton {
    func rotate360Degrees(duration: CFTimeInterval = 1.0, completionDelegate: AnyObject? = nil) {
        let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
        rotateAnimation.fromValue = 0.0
        rotateAnimation.toValue = CGFloat(.pi * 2.0)
        rotateAnimation.duration = duration

        if let delegate: AnyObject = completionDelegate {
            rotateAnimation.delegate = delegate as? CAAnimationDelegate
        }
        self.layer.add(rotateAnimation, forKey: nil)
    }
}

Usage:

For example we can start to make a simple button:

let button = UIButton()
button.frame = CGRect(x: self.view.frame.size.width/2, y: 150, width: 50, height: 50)
button.backgroundColor = UIColor.red
button.setTitle("Name your Button ", for: .normal)
button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
self.view.addSubview(button)

Then we can build its selector:

@objc func buttonAction(sender: UIButton!) {
        print("Button tapped")
        sender.rotate360Degrees()
}