Re: Key-Value-Observing and Collections

• Subject: Re: Key-Value-Observing and Collections
• From: "David Symonds" <email@hidden>
• Date: Thu, 25 Oct 2007 23:30:28 +1000
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On 10/25/07, Philip Mötteli <email@hidden> wrote:
>
> - (void)setGrades:(NSMutableArray *)theGrades;
> - (NSMutableArray *)grades;
> - (void)addGrade:(Grade *)aGrade;

You probably want your addGrade method to look like:

- (void)addGrade:(Grade *)aGrade
{
        [self willChangeValueForKey:@"grades"];
        [grades addObject:aGrade];
        [self didChangeValueForKey:@"grades"];
}


Dave.
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