This happened to me a couple of days ago: <ul> <li>You forgot to set the window outlet of your window controller (File's owner of the Nib file). As Indicated by Nathan, you may see that the <code>-[NSWindowController window]</code> method returns nil.</li> <li>You must also uncheck the Visible at launch option of the sheet. </li> </ul> If mainWindow is nil then the sheet will be displayed as a window/dialog.

Why isn't my sheet attached to the window it's run for?

Tags:

objective-c

cocoa

nswindow

cocoa-sheet

nswindowcontroller

This happened to me a couple of days ago:

You forgot to set the window outlet of your window controller (File's owner of the Nib file). As Indicated by Nathan, you may see that the -[NSWindowController window] method returns nil.
You must also uncheck the Visible at launch option of the sheet.

If mainWindow is nil then the sheet will be displayed as a window/dialog.

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