How to make an object rotate infinitely

Question

I'm trying to figure out how I can make this last forever. Right now it lasts 1 sec.

extension UIView {
func rotate360Degrees(duration: CFTimeInterval = 20, completionDelegate: AnyObject? = nil) {
    let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
    rotateAnimation.fromValue = 0.0
    rotateAnimation.toValue = CGFloat(M_PI * 2.0)
    rotateAnimation.duration = duration

    if let delegate: AnyObject = completionDelegate {
        rotateAnimation.delegate = delegate
    }
    self.layer.addAnimation(rotateAnimation, forKey: nil)
}

}

How are you calling this? `self.rotate360Degrees(duration: 2, completionDelegate: nil)` And it runs for 2 seconds exactly. — gran_profaci, Apr 09 '15 at 00:01
Try converting the answer here to Swift: http://stackoverflow.com/questions/14730460/how-to-make-uiview-animation-sequence-repeat-and-autoreverse — robinkunde, Apr 09 '15 at 01:46

gran_profaci · Accepted Answer · 2015-04-09T19:13:34.790

2

You can add in :

rotateAnimation.repeatCount = Float(CGFloat.max)

Or to reverse and repeat :

rotateAnimation.autoreverse = true // Though this is probably not what you need.

This gave me a forever rotating box.

    let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
    rotateAnimation.fromValue = 0.0
    rotateAnimation.toValue = CGFloat(M_PI * 2.0)
    rotateAnimation.duration = duration
    rotateAnimation.autoreverses = true
    rotateAnimation.repeatCount = Float(CGFloat.max)

edited Apr 09 '15 at 19:13

answered Apr 09 '15 at 18:46

gran_profaci

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Thanks gran_profaci! It works, and I was actually looking for how I could reverse it. Thank you so much ! – Miles H. Apr 09 '15 at 19:01
For some reason I'm having trouble implementing the autoreverse though. How would go about that? If I just add it, it will give me an error. – Miles H. Apr 09 '15 at 19:10
Updated solution. That reverses it too. – gran_profaci Apr 09 '15 at 19:13
Actually, something strange is happening now. It's rotating 360 degrees to one side, then its reversing then its reversing again and it's doing that all the time.. – Miles H. Apr 09 '15 at 19:18
Yup... because what it is doing is : Going one direction. Finishing this animation. Then going the opposite. And so on... – gran_profaci Apr 09 '15 at 20:38
Hours of searching. You are a hero! – A. Petrizza Jun 22 '18 at 04:09

How to make an object rotate infinitely

1 Answers1