Position from the beginning

How to position the window of the app from the beginning, when the app launches?

This works well if I put in a button:

@IBActionfunc test(_ sender: NSButton) {
     view.window?.setFrame(NSRect(x:0,y:0,width:500,height:500), display: true)
}

But it does not work if I put in the viewDidLoad or ViewDidAppear:

overridefunc viewDidLoad() {
        super.viewDidLoad()

        view.window?.setFrame(NSRect(x:0,y:0,width:500,height:500), display: true)
    }