在Swift中设置旋转图像的动画

import QuartzCore

let imageView = UIImageView(image: UIImage(named: "image.png"))

let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
rotationAnimation.toValue = NSNumber(value: Double.pi * 2) // 旋转360度
rotationAnimation.duration = 1.0 // 动画持续时间
rotationAnimation.isCumulative = true // 动画累加
rotationAnimation.repeatCount = Float.greatestFiniteMagnitude // 无限重复

imageView.layer.add(rotationAnimation, forKey: "rotationAnimation")

view.addSubview(imageView)