How can I know NSWindow was closed using the close button ?

Question

Is there an easy way to know when a NSWindow was closed using the close button (of the window title bar) .

Using NSWindowDelegate and the windowWillClose:(NSNotification *)notification method I get notification of each closing. But how can I know the closing request was send by the close button

Is your close button custom? do you run any other action on it? — gmogames
nope it's the red close button in the top left corner of a standard NSWindow. — Matthieu Riegler
maybe you can subclass NSWindow to try and override the performClose method. — gmogames

andyvn22 andyvn22 · Accepted Answer · 2012-07-17T00:12:32

Use [yourWindow standardWindowButton:NSWindowCloseButton] to find the close button, then change its target and action to a custom method.

How can I know NSWindow was closed using the close button ?

1 Answers