NSInvocation error when closing a dirty document
NSInvocation error when closing a dirty document
- Subject: NSInvocation error when closing a dirty document
- From: Brad Stone <email@hidden>
- Date: Sat, 10 Apr 2010 15:43:29 -0400
I have a strange bug that I've been tracking for a while and I'd like the benefit of your experience. It happens with I close a window that needs to be saved.
When closing a dirty Core Data NSPersistentDocument I get the following error between the "Do you want to save" sheet and the save panel:
[58341:a0f] +[NSInvocation invocationWithMethodSignature:]: method signature argument cannot be nil
Yes, I know something is nil but I have not ventured into any of the methods that handle this behavior (I start with SaveDocument) and I don't know exactly what is nil. This happens whether its a document that's never been saved or one that has.
I've tracked it down to an exact sequence of events. The document's window has two combo boxes, a radio button matrix and a text view.
If I make the document dirty by changing the selected radio button and then close the window everything works as expected ("Do you want to save" sheet comes up, I press "Save" and the save panel comes up.
If I make the document dirty by typing text into any of the combo boxes or the text view I get the above error after I press the "Save" button on the "Do you want to save…" sheet (the sheet closes like normal but nothing happens after the error)
After the sheet disappears. I press the close box again and everything works fine: the save panel comes up and the document saves normally.
This made me think that maybe the edits weren't getting updated but those three objects have the bindings set, in IB, to "Continuously Updates Value".
Thanks for the help._______________________________________________
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