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Getting the Item from NSOutlineView's Notifications



I'm trying to save and restore the collapsed/expanded states of an outline view that is part of my document's window (and thus I can't use the provided autosave stuff) so I need to get the item object from the notifications, like:

- (void)outlineViewItemDidExpand:(NSNotification *)notification

But how are you supposed to actually get the item? I used NSLog with [notification userInfo] and it prints out that it has a single item with {NSObject = blah blah blah}, but the key NSObject doesn't work (even though that is clearly shown when printing [[notification userInfo] allKeys] and even [[[notification userInfo] allValues] objectAtIndex:0] doesn't work because it causes an exception. I've Googled, looked on CocoaDev, asked in #macdev on freenode, and looked in the list archives on Cocoa Builder. I'm being driven mad!

This should be ridiculously simple, but nothing I try works and I'm feeling ridiculously silly!



--
Seth Willits

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