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 arraycontroll...@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 arr...@count and indexSet.count as a key condition to a enable field directly? and my question 2, I've tried the indexs...@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 (Cocoa-dev@lists.apple.com) 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 arch...@mail-archive.com
