Re: Using isMemberOfClass with a tree of subclass of NSManagedObject
Re: Using isMemberOfClass with a tree of subclass of NSManagedObject
- Subject: Re: Using isMemberOfClass with a tree of subclass of NSManagedObject
- From: Yoann GINI <email@hidden>
- Date: Sat, 28 Jun 2008 20:07:25 +0200
This doesn't work with isKindOfEntity, used like that :
NSEntityDescription* rootDescription = [[NSEntityDescription
entityForName:@"root" inManagedObjectContext:[self
managedObjectContext]] retain];
...
[rootDescription isKindOfEntity:[modEntry entity]]
It's always return NO...
Le 28 juin 08 à 19:32, mmalc crawford a écrit :
On Jun 28, 2008, at 10:15 AM, Owen Yamauchi wrote:
On Jun 28, 2008, at 9:58 AM, Yoann GINI wrote:
I've a CoreData base with some kind of object what are a subclass
of an abstract class called "root" (root is a subclass of
NSManagedObject). In a part of my code I need to catch all
operation on object what are a child of root. For do that I use
the notification
NSManagedObjectContextObjectsDidChangeNotification and I would use
"isMemberOfClass" method for test each objet. I don't know why but
this method always return "NO" even of an object what are a chlid
of root...
Use -isKindOfClass: instead. -isMemberOfClass: only tells you if an
object is an instance of that specific class. -isKindOfClass:
includes
all superclasses as well.
isKindOfClass: includes all *subclasses* as well.
You should almost certainly, though, not be using class-based tests
-- you should instead test the entity of the managed object (if you
need to test for subentities, use isKindOfEntity).
mmalc
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