Deep thought about "Cannot remove an observer <NSKeyValueObservance XXXX> for the key path "count" .."
Deep thought about "Cannot remove an observer <NSKeyValueObservance XXXX> for the key path "count" .."
- Subject: Deep thought about "Cannot remove an observer <NSKeyValueObservance XXXX> for the key path "count" .."
- From: Celery01 Lin <email@hidden>
- Date: Wed, 1 Apr 2009 11:45:07 +0800
Hi , list
I'm working a project using a collection view. Everything is OK until I'm
using the collection content array's count and indexSet's count to disable
or enable some buttons.
I've got a array called collectionArray , and a indexSet called
collectionIndexSet .
I bind the collectionArray to a arrayController , and this arrayController
bind to the NSCollectionView; the collectionIndexSet bind to the
NSCollectionView selectedIndexes field directly.
I got a button to delete the things in the collectionView . So I bind the
arrayController.@count to Button's enable1 and selectedIndexes.count to
Button's enable2.
Now when I manipulate the collectionArray , add something or remove
something.
The Console will post "Cannot remove an observer <NSKeyValueObservance
0x1800c7e0> for the key path "count" from <NSMutableIndexSet 0x1a03a880>
because it is not registered as an observer."
Now , I have no idea what's going on here .
So my question 1, is it a good way to bind the array.@count and
indexSet.count as a key condition to a enable field directly?
and my question 2, I've tried the indexSet.@count , but the app said it
can't find the key path "@count" , so does that mean "@count" method only
works on array?
Thank you in advance
Best Regards~
- Daniel
_______________________________________________
Cocoa-dev mailing list (email@hidden)
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:
This email sent to email@hidden