Custom NSArrayController - Dynamic Class?
Custom NSArrayController - Dynamic Class?
- Subject: Custom NSArrayController - Dynamic Class?
- From: Brad Gibbs <email@hidden>
- Date: Sat, 18 Jul 2009 09:01:51 -0700
I have a Core Data app and several tables for adding various
entities. I want to add an index to each new object so I can sort
them after fetching. I've been using a custom NSArrayController and
overriding the addObject:, insertObject: atArrangedObjectIndex:, and
removeObject: methods to add or update the indices as I go, using, for
example:
- (void)addObject:(Floor *)object {
[super addObject:object];
object.index = [NSNumber numberWithInt:[[self arrangedObjects]
indexOfObject:object]];
NSLog(@"Added %@", [object description]);
}
This means that I need a custom NSArrayController for each entity. Is
there a way to make the entity name dynamic? In other words, can I
ask the array controller for the name of the entity it's managing, so
I only need one custom NSArrayController subclass to manage this for
several different entity types? I guess I'm looking for a way to
replace the argument (Floor *) from the example above with something
like:
[[[self arrangedObjects] objectAtIndex:0] class]
If I use id, the code doesn't know that the object being added should
have an index.
Thanks.
Brad
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