On 9 Nov 2009, at 20:58, [email protected] wrote: > My Entry objects are an NSManagedObject subclass. > > I create an NSArray of N Entries and add them to my array controller like so. > [self.arrayController addObjects:newEntries]; > > I am observing [self.arrayController arrangedObjects] and receive a single > observation following the above call. > > However, when I undo this operation I get N observations of > [self.arrayController arrangedObjects]. > Looking at [[self.arrayController arrangedObjects] count] I can see that the array size is maintained while the observations occur. So it's not as if the added entries are being removed/undone one at a time.
I am using KVO on my managed object properties and debugging seems to indicate that these observations are the source of the issue during the undo. So I have found a work around: If I override -didChangeValueForKey: and -didChangeValueForKey: so that notifications are not sent while an undo is in progress then I don't get the unanticipated arrangedObjects observations. Yet I don't understand why I have to do this. Why does undo affect the arrangedObjects in this way? > Is this expected behaviour or am I screwing up on my KVO somewhere? > I have not changed the default undo manager grouping behaviour. > > Running OS X 10.6 > > Regards > > Jonathan Mitchell > > Developer > http://www.mugginsoft.com > > > > > > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/jonathan%40mugginsoft.com > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
