Observing Core Data
Observing Core Data
- Subject: Observing Core Data
- From: Julio Cesar Silva dos Santos <email@hidden>
- Date: Thu, 7 Sep 2006 19:48:59 -0300
Hi,
I am working on an application that uses Core Data and I am trying to
implement a (quite) simple feature: Some entities have default values
so I would like to add these values when the user launches the app
for the first time. For this I have an NSArrayController bound to an
entity and I thought that would be easy to observe it (using
addObserver:forKeyPath:option:context and implementing
observeValueForKeyPath:ofObject:change:context) but it is not. I have
tested 'arrangedObjects.@count' KeyPath but it is only triggered when
the array already has objects. No KeyPaths for NSArrayController are
notified when the content is empty. My questions are:
1) Is it the right approach?
2) If it is, how can I tell whether the content is empty or not?
3) If it is not, should I observe another object (maybe
NSManagedObjectContext)?
Thanks for any help,
Julio Cesar Silva dos Santos
email@hidden
Blogjective-C
http://www.jcs.santos.nom.br/wp
FetchYourLyrics
http://www.jcs.santos.nom.br/fyl/fyl.html
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden