How to wait for an animator to finish?

Question

This is probably a simple question but I can\'t seem to figure out how to do it. Basically all I want to do is fade a window before closing it:

[[window anim         


        

Answer 1

[[window animator] setAlphaValue:0.0];
[window performSelector:@selector(performClose:) withObject:self afterDelay:[[NSAnimationContext currentContext] duration]];