viewWillAppear or viewDidAppear on NSWindowController

Question

I\'m developing an app on MacOS X with Xcode5.1

and there\'s an action I want to trigger everytime the user opens or shows a NSWindowController all I found was

Answer 1

If you really need to know the windows occlusion state go with @Cemen's answer, otherwise I'd recommend you just use the

viewWillAppear
viewDidAppear

etc. of your windows contentViewController. Just subclass that and override it there.