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 4 UIView extension:

extension UIView {
  func animateBorderColor(toColor: UIColor, duration: Double) {
    let animation:CABasicAnimation = CABasicAnimation(keyPath: "borderColor")
    animation.fromValue = layer.borderColor
    animation.toValue = toColor.cgColor
    animation.duration = duration
    layer.add(animation, forKey: "borderColor")
    layer.borderColor = toColor.cgColor
  }
}

And then just use it by writing:

myView.animateBorderColor(toColor: .red, duration: 0.5)