[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Key-Value-Observing and Collections

Subject: Key-Value-Observing and Collections
From: Philip Mötteli <email@hidden>
Date: Thu, 25 Oct 2007 15:23:05 +0200
Delivered-to: email@hidden
Delivered-to: email@hidden

Hi,

There is something, I just don't get with KVO. Lets say, I have an object

@interface Pupil
{
	NSMutableArray	grades;
}


- (void)setGrades:(NSMutableArray *)theGrades;
- (NSMutableArray *)grades;
- (void)addGrade:(Grade *)aGrade;

@end

Using KVO, I want to be notified not only, when the old grades collection object (NSMutableArray) is replaced, but also, when a Grade instance is added to the grades collection (something like "[grades addObject:aGrade]"). The first case is easy, because I know the attribute name (grades), which gives the key. But for the second, I don't know the attribute name, so I can't add an observer. Can anybody explain me how to do this?


Thanks
Phil

_______________________________________________

Cocoa-dev mailing list (email@hidden)

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/email@hidden

This email sent to email@hidden

Follow-Ups:
- Re: Key-Value-Observing and Collections
  - From: David Spooner <email@hidden>
- Re: Key-Value-Observing and Collections
  - From: "David Symonds" <email@hidden>

Prev by Date: Re: Troublesome app when scaling it up, how to proceed?
Next by Date: Re: Key-Value-Observing and Collections
Previous by thread: Re: NSLocalizedString and plural form
Next by thread: Re: Key-Value-Observing and Collections
Index(es):
- Date
- Thread

Home