迅捷4旋转跳回

Question

我正在旋转手表图标上的分钟指针，但是在动画结束时，它跳回到了起始位置。如何让它停留在停止的地方？

let rotation: CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
rotation.toValue = Double.pi
rotation.duration = 0.5 // or however long you want ...
rotation.isCumulative = true
watchIconMin.layer.add(rotation, forKey: "rotationAnimation")

Answer 1

如果watchIconMin是UIView的子类或类，则使用UIView动画。

    UIView.animate(withDuration: 0.5, animations: {
        self.watchIconMin.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
    }) { (success) in
        self.watchIconMin.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
    }