Hide NSWindow title bar

Question

Is there a way to hide the titlebar in an NSWindow? I don\'t want to have to completely write a new custom window. I can\'t use NSBorderlessWindowMask because I have a botto

Answer 1

Kind of Welcome screen NSWindow / NSViewController setup (Swift 4.1)

extension NSWindow {

   enum Style {
      case welcome
   }

   convenience init(contentRect: CGRect, style: Style) {
      switch style {
      case .welcome:
         let styleMask: NSWindow.StyleMask = [.closable, .titled, .fullSizeContentView]
         self.init(contentRect: contentRect, styleMask: styleMask, backing: .buffered, defer: true)
         titlebarAppearsTransparent = true
         titleVisibility = .hidden
         standardWindowButton(.zoomButton)?.isHidden = true
         standardWindowButton(.miniaturizeButton)?.isHidden = true
      }
   }
}

class WelcomeWindowController: NSWindowController {

   private (set) lazy var viewController = WelcomeViewController()
   private let contentWindow: NSWindow

   init() {
      contentWindow = NSWindow(contentRect: CGRect(x: 400, y: 200, width: 800, height: 472), style: .welcome)
      super.init(window: contentWindow)

      let frameSize = contentWindow.contentRect(forFrameRect: contentWindow.frame).size
      viewController.view.setFrameSize(frameSize)
      contentWindow.contentViewController = viewController
   }
}

class WelcomeViewController: NSViewController {

   private lazy var contentView = View()

   override func loadView() {
      view = contentView
   }

   init() {
      super.init(nibName: nil, bundle: nil)
   }

   override func viewDidLoad() {
      super.viewDidLoad()
      contentView.backgroundColor = .white
   }
}

class View: NSView {

   var backgroundColor: NSColor?

   convenience init() {
      self.init(frame: NSRect())
   }

   override func draw(_ dirtyRect: NSRect) {
      if let backgroundColor = backgroundColor {
         backgroundColor.setFill()
         dirtyRect.fill()
      } else {
         super.draw(dirtyRect)
      }
   }
}

Result

Answer 2

Swift

NSApp.mainWindow?.styleMask = .borderless