how to remove border from UIVIEW - swift

Question

I want to know if there is a way to remove the border from view in swift after I have done this:
func addRightBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: self.frame.size.width - width,y: 0, width:width,
height:self.frame.size.height)
self.layer.addSublayer(border)
}
I have tried this ->
func removeBorder(){
self.layer.sublayers?.removeAll()
}
but it doesn't work

Answer 1

You should simply save your own reference to this layer, rather than using sublayers. Using sublayers is not prudent as there might be layers other than your border layer.
Thus:
weak var borderLayer: CALayer?
func addRightBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: bounds.maxX - width,
y: bounds.minY,
width: width,
height: bounds.height)
layer.addSublayer(border)
self.borderLayer = border
}
func removeBorder() {
borderLayer?.removeFromSuperlayer()
}
This obviously assumes that this was for a subclass of UIView and not an extension. If for the latter, you’d have to use an associated object to keep track of the border layer.
Note, one should not use frame when figuring out where to place the sublayer. Always use bounds.
Taking it a step further, you may want it to gracefully respond to frame changes, too:
override func layoutSubviews {
super.layoutSubviews()
borderLayer?.frame = CGRect(x: bounds.maxX - width,
y: bounds.minY,
width: width,
height: bounds.height)
}