How to animate borderColor change in swift

Question

For some reason this isn\'t working for me:

let color = CABasicAnimation(keyPath: \"borderColor\")
color.fromValue = sender.layer.borderColor;
color.toValue          


        

Answer 1

(Swift 5, Xcode 11, iOS 13)

For anyone who is wanting to change border color and width at the same time, the following code is working for me & the animation looks very smooth. Maybe someone else knows of a way to combine both into one?

let borderColorAnimation: CABasicAnimation = CABasicAnimation(keyPath: "borderColor")
borderColorAnimation.fromValue = layer.borderColor
borderColorAnimation.toValue = toColor.cgColor
borderColorAnimation.duration = animationDuration
layer.add(borderColorAnimation, forKey: "borderColor")
layer.borderColor = toColor.cgColor

let borderWidthAnimation: CABasicAnimation = CABasicAnimation(keyPath: "borderWidth")
borderWidthAnimation.fromValue = layer.borderWidth
borderWidthAnimation.toValue = toWidth
borderWidthAnimation.duration = animationDuration
layer.add(borderWidthAnimation, forKey: "borderWidth")
layer.borderWidth = toWidth