Add just a top border to an UIView with Quartzcore/layer?

Question

Is it possible to add a border just on top of a UIView, if so, how please?

Answer 1

GilbertOOI's answer in Swift 2:

let topBorder: CALayer = CALayer()
topBorder.frame = CGRectMake(0.0, 0.0, myView.frame.size.width, 3.0)
topBorder.backgroundColor = UIColor.redColor().CGColor
myView.layer.addSublayer(topBorder)