ios - Round two corners in UIView

Question

A little while ago I posted a question about rounding just two corners of a view, and got a great response, but am having problems implementing it. Here is my drawRect: method:

- (void)drawRect:(CGRect)rect {
    //[super drawRect:rect]; <------Should I uncomment this?
    int radius = 5;
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextBeginPath(context);
    CGContextAddArc(context, rect.origin.x + radius, rect.origin.y + rect.size.height - radius, radius, M_PI, M_PI / 2, 1);
    CGContextAddArc(context, rect.origin.x + rect.size.width - radius, rect.origin.y + rect.size.height - radius, radius, M_PI / 2, 0.0f, 1);
    CGContextClosePath(context);
    CGContextClip(context);
}

The method is being called, but doesn't seem to affect the outcome of the view. Any ideas why?

Answer 1

CACornerMask introduced in iOS 11, which help to define topleft, topright, bottomleft, bottom right in view layer. Below is example to use.

Here I try to rounded only two top corner:

myView.clipsToBounds = true
myView.layer.cornerRadius = 10
myView.layer.maskedCorners = [.layerMinXMinYCorner,.layerMaxXMinYCorner]

FYI Ref: