CALayer create transparent round mask
ios, iphone, quartz-core
Solution
Yeah, kCAFillRuleEvenOdd didn't do it's magic without adding a rect first, here is a working snippet though:
CAShapeLayer *shape = [CAShapeLayer layer];
shape.frame = self.bounds;
CGMutablePathRef pathRef = CGPathCreateMutable();
CGPathAddRect(pathRef, NULL, self.bounds);
CGPathAddEllipseInRect(pathRef, NULL, self.bounds);
shape.fillRule = kCAFillRuleEvenOdd;
shape.path = pathRef;
self.layer.mask = shape;
Problem
I want to create a mask layer which is a circle that makes the circle content transparent and keep everything around. Unfortunately, the following code does the opposite, it draws a circle and make everything around transparent. ``` CAShapeLayer * shape = [CAShapeLayer layer]; shape.frame = CGRectMake((CGSSize().width/2.f)-40.f, -40.f, 80.f, 80.f); CGPathRef pathRef = CGPathCreateWithEllipseInRect(CGRectMakeBoundsWithSize(shape.frame.size), NULL); shape.path = pathRef; shape.fillColor = [UIColor blueColor].CGColor; self.layer.mask = shape; ```