How to add only a TOP border on a UIButton?

Question

I know how to add border to a button in iOS 7, with the following code :

[[myButton layer] setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]]; [[myButton layer] setBorderWidth:1]; [[myButton layer] setCornerRadius:15]; 

But how can I add just one border ? I want to add only the top border.

Answer 1

UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, btn.frame.size.width, 1)]; lineView.backgroundColor = [UIColor redColor]; [btn addSubview:lineView]; 

you can do the same for each border. Adding multiple UIViews you can add bottom and left or top and right or any border you want.

i.e. bottom & left:

UIView *bottomBorder = [[UIView alloc] initWithFrame:CGRectMake(0, btn.frame.size.height - 1.0f, btn.frame.size.width, 1)]; bottomBorder.backgroundColor = [UIColor redColor];  UIView *leftBorder = [[UIView alloc] initWithFrame:CGRectMake(1, 0, 1, btn.frame.size.height)]; leftBorder.backgroundColor = [UIColor redColor];  [btn addSubview:bottomBorder]; [btn addSubview:leftBorder]; 

if you don't use ARC, remember to release UIViews after adding subviews (or use autorelease).