> I could need some help with a Core Data related problem I am experiencing, > and I am not entirely sure I understand everything Cocoa does behind my back. > In more detail :
It'd be best if you'd post specific questions regarding what you believe and what you're unsure of. This is essential if you wish to succeed with this advanced Cocoa topic. > In Interface Builder, I dragged two "Core Data Entity" library objects on my > window - one for the TreeNode entity, one for the TreeGroup entity. Again, I > did not change anything except for choosing a Master/Detail view and > specifying the addition of Add/Remove buttons. Why do you want views for both the abstract and the concrete? A view for TreeNode will show all kinds of TreeNode (TreeGroup and anything else). Is this really what you want? > Ok, what I expect to see when I run this and click the "Add TreeGroup" button > is a TreeGroup object appearing in the TreeGroup table view (this works all > right) and SIMULTANOUSLY a TreeNode "object" (I don't know if this is > supposed to be an object since the Entity is abstract) in the TreeNode table > view. The problem is, the TreeNode object sometimes appears as soon as I > press the add button, sometimes I have to enter a view with the mousepointer > for it to appear. No need to say that this is very irritating. Here's where you're mistaken. Only one *instance* is created: A 'TreeGroup' instance (which is a kind of TreeNode). The reason it's only showing up in one place reliably is because the add: message is being sent to *one* controller. Your other controller may not have been informed that it needs to -fetch: to update its contents. Hopefully that's enough of a push in the right direction for you to research this more thoroughly ... -- I.S. _______________________________________________ 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 [EMAIL PROTECTED]
