Round some corners of UIView and round the view’s layer’s border too

Question

I am trying to round the bottom two corners of a UIView, and have the layer’s border show up rounded as well. I am currently doing:

UIRectCorners corners = U         


        

Answer 1

Zev Eisenberg's answer is the right one.

Although I prefer:

[self.layer addSublayer:strokeLayer];

instead of creating and adding a subview:

CGSize radii = CGSizeMake(radius, radius);

UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:self.bounds
                                           byRoundingCorners:corners
                                                 cornerRadii:radii];

// Mask the container view’s layer to round the corners.
CAShapeLayer *cornerMaskLayer = [CAShapeLayer layer];
[cornerMaskLayer setPath:path.CGPath];
self.layer.mask = cornerMaskLayer;

// Make a transparent, stroked layer which will dispay the stroke.
CAShapeLayer *strokeLayer = [CAShapeLayer layer];
strokeLayer.path = path.CGPath;
strokeLayer.fillColor = [UIColor clearColor].CGColor;
strokeLayer.strokeColor = color.CGColor;
strokeLayer.lineWidth = 2; // the stroke splits the width evenly inside and outside,
// but the outside part will be clipped by the containerView’s mask.

[self.layer addSublayer:strokeLayer];