How Do You CAKeyframeAnimation Scale?

Question

I want to create an animation with several key frames. I want my Layer (a button in this case) to scale up to 1.5 then down to 0.5 then up to 1.2 then down to 0.8 then 1.0.<

Answer 1

transform.scale, anyone?

let anim = CAKeyframeAnimation(keyPath: "transform.scale")
anim.values = [0, 1, 0, 1, 0, 1, 0]
anim.duration = 4.0

smallView.layer.addAnimation(anim, forKey: "what")

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Totally unrelated, if you are gonna use floats in the values array, you must add them as NSNumbers, otherwise they'd just end up as 0s!

anim.values = [0.0, 1.2, 0.9, 1.0].map { NSNumber(double: $0) }