Xcode & Swift - Window without title bar but with close, minimize and resize buttons

Question

I am currently using Swift in Xcode 6, Beta 5. I am trying to remove the title bar, or any visible difference between the title bar and the actual content. If I enable \"Uni

Answer 1

Update Sept. 2017, taget 10.11:

override func viewDidAppear() {
    super.viewDidAppear()

    self.view.window?.titleVisibility = .hidden
    self.view.window?.titlebarAppearsTransparent = true
    self.view.window?.styleMask.insert(.fullSizeContentView)
}