Rounded rect on NSView that clips all containing subviews

Question

I am creating a NSView subclass that has rounded corners. This view is meant to be a container and other subviews will be added to it. I am trying to get the rounde

Answer 1

Using Core Animation layers will clip sublayers correctly.

In your container NSView subclass:

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.layer = _layer;   // strangely necessary
        self.wantsLayer = YES;
        self.layer.masksToBounds = YES;    
        self.layer.cornerRadius = 10.0;    
    }    
    return self;
}