CABasicAnimation

背景 需要做一个扇形带指示器的进度条动画，最初实现的是如下效果 代码如下 func startAnimation() { let width = self.frame.width let bezierPath = UIBezierPath(arcCenter: CGPoint(x: width / ......

IOS CABasicAnimation实现旋转动画 定义一个CABasicAnimation lazy var rotateAnimation: CABasicAnimation = { let animation = CABasicAnimation(keyPath: "transform.ro ......