我有一个按钮，我已将其替换为一个图标，当单击该图标时，我希望它放大和缩小 5 秒。我怎样才能做到这一点？我为按钮制作了一组 5 张不同尺寸的图片，我可以循环使用这些图片还是有其他方法？
@IBAction func myButton(sender: UIButton){
//animation that zoom the button icon in and out
}
编辑:我正在使用 Xcode 6.4
最佳答案
为了展示替代方案，我将展示一种使用动画图层的方法。 更多相关信息 here
将此代码添加到您的函数中(提示在代码注释中):
// specify the property you want to animate
let zoomInAndOut = CABasicAnimation(keyPath: "transform.scale")
// starting from the initial value 1.0
zoomInAndOut.fromValue = 1.0
// to scale down you set toValue to 0.5
zoomInAndOut.toValue = 0.5
// the duration for the animation is set to 1 second
zoomInAndOut.duration = 1.0
// how many times you want to repeat the animation
zoomInAndOut.repeatCount = 5
// to make the one animation(zooming in from 1.0 to 0.5) reverse to two animations(zooming back from 0.5 to 1.0)
zoomInAndOut.autoreverses = true
// because the animation consists of 2 steps, caused by autoreverses, you set the speed to 2.0, so that the total duration until the animation stops is 5 seconds
zoomInAndOut.speed = 2.0
// add the animation to your button
button.layer.addAnimation(zoomInAndOut, forKey: nil)
结果:
关于ios - 动画 UIButton 以在单击时放大和缩小，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38951272/