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macoscocoanswindownswindowcontrollerdocument-based

Prevent save prompt when closing NSWindow

I have a document-based Cocoa app that uses a secondary NSWindow for a preview mode (with shouldCloseDocument set to NO).

If the document is dirty (edited without saving) and I close the secondary NSWindow, a "Do you want to save the changes made to the document" prompt appears.

How can I avoid this prompt on the secondary NSWindow?

Solution

  • I couldn't find a way to do this. I expected to find a NSWindowDelegate or NSWindow method called before the save prompt but none of the obvious candidates (windowWillClose, close, performClose, windowShouldClose) are.

    As a workaround, instead of setting NSWindowController.document I'm using a custom property to pass the document. With document set to NIL, the save prompt is not shown anymore.