Setting Window Level Swift Error OSX

Question

When trying to set window level in swift im getting Use of unresolved identifier 'window' error using:

window.level = Int(CGWindowLevelForKey(Int32(kCGScreenSaverWindowLevelKey)))

or

window.level = NSScreenSaverWindowLevel

Ive Checked here How to set window level in Swift

Here Mac OS X, make a window go over menu bar

Here NSWindow Class

I cant seem to access NSViewController or NSWindowController window property

Answer 1

Update for Swift 2:

panel.level = Int(CGWindowLevelForKey(CGWindowLevelKey.PopUpMenuWindowLevelKey))

Answer 2

Subclass NSWindowController

in windowDidLoad()

window?.level = Int(CGWindowLevelForKey(Int32(kCGScreenSaverWindowLevelKey)))