Getting the rotation angle after CABasicAnimation?
I had a view that I rotate a lot, often more than 360 degrees (spins around a few times). Each time it stops, I wanted to determine the resulting “visual” angle. How does one go about doing that? rotateView is a configured CABasicAnimation:
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let rotateView = CABasicAnimation() let randonAngle = arc4random_uniform(361) + 1440 rotateView.fromValue = 0 rotateView.toValue = Float(randonAngle) * Float(M_PI) / Float(randomBetweenNumbers(firstNum: 90.0, secondNum: 180.0))//180.0 let randomSpeed = randomBetweenNumbers(firstNum: 1.5, secondNum: 2.1) rotateView.duration = CFTimeInterval(randomSpeed) rotateView.repeatCount = 0 rotateView.isRemovedOnCompletion = false rotateView.fillMode = kCAFillModeForwards rotateView.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut) innerRing.layer.add(rotateView, forKey: "transform.rotation.z") |
Once done, I dispatch after the randomSpeed duration so I know …