NSFormatter & Undo
NSFormatter & Undo
- Subject: NSFormatter & Undo
- From: Keary Suska <email@hidden>
- Date: Wed, 12 Jul 2006 17:58:07 -0600
- Thread-topic: NSFormatter & Undo
I have a custom NSFormatter that filters out unwanted characters and applies
a format on field exit. Everything works fine until I try to undo. The undo
is completely messed up if any "invalid" character is entered or a paste is
done that contains invalid characters. With multi-character pastes, I almost
invariably get:
-[NSBigMutableString substringWithRange:] called with out-of-bounds range.
For apps linked on Tiger this will raise an exception. For earlier apps it
will produce this one-time warning and continue with existing behavior
(which is undefined).
*** -[NSBigMutableString substringWithRange:]: Range or index out of bounds
My assumption is that only the pre-formatted edit is being registered with
the undo manager, and the programmatic changes are invalidating the undo
action.
If this is indeed the case, do I need to handle my own undo, or can I just
call -removeAllActions and -registerUndoWithTarget:selector:object: on the
current field editor's undo manager?
Thanks,
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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