Animate-Border-Width-And-Color.swift

func updateOutline(isShowing: Bool, animated: Bool) {
    let toColor: UIColor = isShowing ? .systemBlue : .clear
    let toWidth: CGFloat = isShowing ? 2 : 0
    let animationDuration = 0.2

    if animated {
        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
    } else {
        layer.borderColor = toColor.cgColor
        layer.borderWidth = toWidth
    }
}