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]          


        

Answer 1

Actually I meet this questions as you,but I think my method is better than the answer which you choose. You should create a class inherit the UIControl like UIButton.

@interface customButton : UIButton

and rewrite the drawrect method like this:

- (void)drawRect:(CGRect)rect {
    // Drawing code
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetLineCap(context, kCGLineCapRound);
    CGContextSetLineWidth(context, 1.5);  //线宽
    CGContextSetAllowsAntialiasing(context, true);
    CGContextSetRGBStrokeColor(context, 193/255.0, 205/255.0, 193/255.0, 1.0);  //线的颜色
    CGContextBeginPath(context);

    CGContextMoveToPoint(context, 0, 0);  //起点坐标
    CGContextAddLineToPoint(context, self.frame.size.width, 0);   //终点坐标

    CGContextStrokePath(context);
}

By the way~ your purpose UIControl should use your class in xib's setting

[![this setting][1]][1]

Last~ show you my custom UIButton. I think we should choose this method and combine UIBezierPath's API to finish our demand.

[![enter image description here][2]][2]

Thank you for watching~ hope to study and discuss together~ From a iOS fisherman -- vvlong [1]: https://i.stack.imgur.com/ywIZk.png [2]: https://i.stack.imgur.com/mmfOB.png