Center window in screen

Question

Is there any way to center a window in the center of the screen in OSX?

I am using the code below but it changes just the size but not the position on screen.

override func viewDidLoad() {
        super.viewDidLoad()

        let ScreenStart = NSSize(width: (NSScreen.mainScreen()?.frame.width)! / 1.5, height: (NSScreen.mainScreen()?.frame.height)! / 1.5)

        self.view.frame.size = ScreenStart
        self.view.frame.origin = NSPoint(x: (NSScreen.mainScreen()?.frame.origin.x)!/2, y: (NSScreen.mainScreen()?.frame.height)! / 2)  
    }

Answer 1

For future references this is done inside NSWindowController class using self.window?.center()