每次按下按钮时,我希望能够将对象(在我的情况下,图像“小狗”)向上移动1个像素.我偶然发现了旧的Objective-C解决方案以及类似的
Swift代码,但没有一个适合我的具体问题.我很想知道移动图像的简单方法.这是我的代码到目前为止我可以收集的内容(我希望它不必要地长,可以减少到一两行)：
@IBAction func tapButton() {
UIView.animateWithDuration(0.75,delay: 0,options: UIViewAnimationOptions.CurveLinear,animations: {
self.puppy.alpha = 1
self.puppy.center.y = 0
},completion: nil)
var toPoint: CGPoint = CGPointMake(0.0,1.0)
var fromPoint : CGPoint = CGPointZero
var movement = CABasicAnimation(keyPath: "movement")
movement.additive = true
movement.fromValue = NSValue(CGPoint: fromPoint)
movement.toValue = NSValue(CGPoint: toPoint)
movement.duration = 0.3
view.layer.addAnimation(movement,forKey: "move")
}