我的视图中有一个圆圈,有一个可以围绕那个大圆圈移动的小椭圆,移动小椭圆的想法是改变时钟的时间。我试图移动椭圆形但只是沿着路径移动,所以它不会离开圆圈。好像它是一条铁路,火车只跟随铁路,但当时跟随手指的位置。 在这里,我附上了图片Image
我尝试制作动画,然后使用该动画然后跟随手指。我真的不知道该怎么做。有什么帮助吗?
这是我的动画代码(不起作用):
let customPath = UIBezierPath()
customPath.move(to: CGPoint.init(x: 160, y: 165))
customPath.addLine(to: CGPoint.init(x: 260, y: 245))
customPath.addLine(to: CGPoint.init(x: 165, y: 365))
customPath.addLine(to: CGPoint.init(x: 60, y: 260))
let movingImage = UIImage(named: "MoveOval")
let movingLayer = CALayer()
movingLayer.anchorPoint = CGPoint.zero
movingLayer.contents = moveOval
movingLayer.frame = CGRect.init(x: 0.0, y: 0.0, width: (movingImage?.size.width)!, height: (movingImage?.size.height)!)
self.view.layer.addSublayer(movingLayer)
let pathAnimation = CAKeyframeAnimation(keyPath: "anim")
pathAnimation.duration = 4.0
pathAnimation.path = customPath.cgPath
pathAnimation.calculationMode = kCAAnimationLinear
movingLayer.add(pathAnimation, forKey: "anim")