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Editorial Team
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Asked: 2026-05-13T05:34:49+00:00

I need to create an modal dialog, which is to loaded from a nib

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I need to create an modal dialog, which is to loaded from a nib file and should be displayed on a button click in the main window.

I can create a custom window in a nib file and load the custom dialog on button click, but it’s not a modal dialog. I can switch back to the main window.

MyWindowController is the NSWindowController subclass.
I used the code below to display my window in response to the button event:

MyWindowController *pController = [[MyWindowController alloc] 
                                   initWithWindowNibName:@"nibfilename"];
[MyWindowController showWindow:self];
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1 Answer

  1. Editorial Team

    There are several ways to do this — and in fact two different kinds of modal dialog in OS X: application-modal and window-modal. Using the wrong one will annoy people. One is a sheet, which is attached to the window that it affects (save dialogs are an example of this). The other is application-modal, which blocks the whole application (open dialogs work this way, since they don’t apply to any window that exists yet). Apple’s sheet documentation should help get you oriented.

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