UIView with transparent in middle

Question

Is it possible to create such a UIView fill with color, but in the middle is transparent?

I'm thinking about to create 5 UIViews here. Just wondering is it possible to accomplish by using only ONE UIView

Answer 1

From Duncan C, I get to know where should I start, then I found CALayer with transparent hole in it.

UIBezierPath *overlayPath = [UIBezierPath bezierPathWithRect:self.view.bounds];
UIBezierPath *transparentPath = [UIBezierPath bezierPathWithRect:CGRectMake(60, 120, 200, 200)];
[overlayPath appendPath:transparentPath];
[overlayPath setUsesEvenOddFillRule:YES];

CAShapeLayer *fillLayer = [CAShapeLayer layer];
fillLayer.path = overlayPath.CGPath;
fillLayer.fillRule = kCAFillRuleEvenOdd;
fillLayer.fillColor = [UIColor colorWithRed:255/255.0 green:20/255.0 blue:147/255.0 alpha:1].CGColor;

[self.view.layer addSublayer:fillLayer];

Make use of 2 UIBezierPath, then fill with color that I want (in my question is pink color), then add as sublayer