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

remus' answer in Obj-C:

 CALayer *topBorder = [CALayer new];
 topBorder.frame = CGRectMake(0.0, 0.0, self.frame.size.width, 3.0);
 topBorder.backgroundColor = [UIColor redColor].CGColor;
 [myView.layer addSublayer:topBorder];