Swift NSValue.valueWithCGRect

Question

我试着用Facebook pop UIButton POPSpringAnimation动画化一个NSValue.valueWithCGRect的界限，但是我找不到我应该用什么来代替NSValue.valueWithCGRect

这就是我想做的：

@IBAction func buttonTapped(sender : UIButton) {

    var springAnimation = POPSpringAnimation()
    springAnimation.property = POPAnimatableProperty.propertyWithName(kPOPLayerBounds) as POPAnimatableProperty
    springAnimation.springBounciness = 12.0
    springAnimation.springSpeed = 10.0

    springAnimation.toValue = NSValue.valueWithCGRect(newBounds)

    shutterButton.pop_addAnimation(springAnimation, forKey: "size")

}

Answer 1

这将汇编：

let rect = CGRect(x: 0,y: 0,width: 1,height: 1)
let val = NSValue(CGRect: rect)

这是“初始化器语法”。

Answer 2

这是我的解决方案：

func scaleView(view: UIView, magnitude: CGFloat) {
    var springAnimation = POPSpringAnimation()
    springAnimation.property = POPAnimatableProperty.propertyWithName(kPOPViewScaleXY) as POPAnimatableProperty
    springAnimation.springBounciness = 12.0
    springAnimation.springSpeed = 10.0

    let newRect = CGRect(x: (view.bounds.origin.x + (view.bounds.size.width / 2.0)) - ((view.bounds.size.width / 2.0) * magnitude), y: (view.bounds.origin.y + (view.bounds.size.height / 2.0)) - ((view.bounds.size.height / 2.0) * magnitude), width: view.bounds.size.width * magnitude, height: view.bounds.size.height * magnitude)

    springAnimation.fromValue = NSValue(CGRect: view.bounds)
    springAnimation.toValue = NSValue(CGRect: newRect)
    view.pop_addAnimation(springAnimation, forKey: "size")
}

Answer 3

在Swift：

    let hover = CABasicAnimation(keyPath: "position")
    hover.additive = true
    hover.fromValue = NSValue(CGPoint: CGPointZero)
    hover.toValue = NSValue(CGPoint: CGPointMake(0.0, -10.0))
    hover.autoreverses = true
    hover.duration = 0.2
    hover.repeatCount = Float(Int.max)
    button.layer.addAnimation(hover, forKey: "myHoverAnimation")