Cocoa draw noise

问题:

Is it possible to draw some noise on top of a rect I filled using NSRectFill? I need to make my app that draws a custom title bar look wonderful on 10.7 before release, and to make it look a little more like iTunes. I would love if this is possible using no images, but if I have to include a PNG or something as a mask, I'd be fine with that.

Thanks!

回答1:

You can either use drawing logic (drawing a lot of small rects, lines or other polygons), or use NSImage's drawing methods, like for instance: drawInRect:fromRect:operation:fraction: