Programmatically hide and close the window of current NSViewController

Question

I would like to hide/close my main app window in func viewDidLoad() and only show/unhide the main window if some event requires it.

I tried self.view.window?.close() but this leaves a white window. I also tried NSApp.hide(nil) but then I can't unhide with NSApp.unhide(nil). Here is some sample code:

override func viewDidLoad() {
   super.viewDidLoad()
   // Do any additional setup after loading the view.
   NSApp.hide(nil)
   runTest()
}

func runTest () {
   let check = false

   if check == false {
      NSApp.unhide(nil)
   }
}

Uncheck "Visible At Launch" in IB if you want to window to be invisible by default. — Willeke, Jan 20 '18 at 11:36
Thanks for the suggestion El Tomato but is still doesent work. there must be a simple solution to: starting the app hidden and unhide if something happens without killing the window completely. — doom4, Jan 24 '18 at 05:47
Possible duplicate of [How to hide the initial window on start with OS X storyboards](https://stackoverflow.com/questions/27999177/how-to-hide-the-initial-window-on-start-with-os-x-storyboards) — Willeke, Jan 25 '18 at 16:24

score 2 · Answer 1 · edited Jun 20 '20 at 09:12

2

From the NSWindow documentation

func orderOut(_ sender: Any?)

Removes the window from the screen list, which hides the window.

func makeKeyAndOrderFront(_ sender: Any?)

Moves the window to the front of the screen list, within its level, and makes it the key window; that is, it shows the window.

Hide and Close are two different things:

If the window is the key or main window, the window object immediately behind it is made key or main in its place. Calling orderOut(_:) causes the window to be removed from the screen, but does not cause it to be released. See the close() method for information on when a window is released. Calling orderOut(_:) on a child window causes the window to be removed from its parent window before being removed.

Hiding the application (NSApp.hide(nil) is another different thing: It

Hides all the receiver’s windows, and the next app in line is activated.

edited Jun 20 '20 at 09:12

Community

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answered Jan 20 '18 at 05:50

vadian

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I read this but I didn't know how to use it. Could you provide some sample code? – doom4 Jan 20 '18 at 05:58
Just call the methods on the main window e.g. `self.view.window?.makeKeyAndOrderFront(nil)` – vadian Jan 20 '18 at 06:01
I tried `self.view.window?.orderOut(nil)` in `func viewDidLoad()`. Any idea why this doesn't work? – doom4 Jan 20 '18 at 06:20
try `orderOut(self)` – mugx Jan 20 '18 at 06:22
`override func viewDidLoad() { super.viewDidLoad(); self.view.window?.orderOut(self);}` doesn't work either. – doom4 Jan 20 '18 at 06:26

Programmatically hide and close the window of current NSViewController

1 Answers1