Re: How to make KVO setup persistent?

FROM : Arthur C.
DATE : Wed Jul 26 22:51:43 2006

>Briefly looking through the archives, it looks like you might be able  to
>just re-setup the KVO in awakeFromFetch:
>http://www.cocoabuilder.com/archive/message/cocoa/2006/2/21/157227


My latest attempt involves using awakeFromFetch (Person) in which the Age's
are fetched using a fetchRequest.

-(void) awakeFromFetch
{
  //  fragment of code
       Age * Age = [[[Age alloc] init] autorelease];
       myAge = [fetchResults objectAtIndex: 0];
       [myAge index];
       [self addObserver: myAge forKeyPath:@"geboortejaar" options:
NSKeyValueObservingOptionNew context:managedObjectContext];
}

It still does not work, sometimes it crashes. The point is that the Age's
get released / dealloced after this method has been called... The
'autorelease' looks no good, but I don't know what else should be done.

Any suggestions?

Arthur C.

>Another thought I had was instead of KVO, you could possibly set the  Age
>relationship as a dependent key of the birth year, though I'm not  sure
>that dependent keys work with relationships.
>
>Those are all semi-guesses on my part, but hopefully one will turn  into a
>real solution for you.
>
>George


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