Can't capture masks within view layer

Question

So I\'m applying an image mask to a UIView layer with the following code:

CALayer *maskLayer = [CALayer layer];
UIImage *maskImage = self.image.image;
maskLayer.         


        

Answer 1

It's unfortunate, but that's just how it works. The documentation for -[CALayer renderInContext:] says:

... layers that use 3D transforms are not rendered, nor are layers that specify backgroundFilters, filters, compositingFilter, or a mask values.

CoreAnimation is intended for on-screen, animated drawing; it isn't a general-purpose graphics framework. Try using CoreGraphics instead -- it isn't that difficult, you'll have more control, and you'll get higher-quality output.