NSImageView transparency

Question

I'm beginner with programming for OS X and I have problems with setting NSImageView transparency.

In iOS it was quite simple, there's property in UIImageView called alpha and I could change it and animate it. (like imageView.alpha = 0.5)

How can I achieve the same with NSImageView?

Answer 1

set the property alphaValue of a NSView that has a layer!

[view setWantsLayer:YES];
[view setAlphaValue:0];