On Feb 28, 2010, at 11:45 AM, Chris Tracewell wrote: > On Feb 28, 2010, at 9:26 AM, Jens Alfke wrote: > >> On Feb 28, 2010, at 8:23 AM, Chris Tracewell wrote: >> >>> I have two synthesized properties - A and B. Whenever A changes I need B to >>> be updated to A.keypath. >> >> If B's value is entirely dependent upon A, you don't even need to synthesize >> it — you can just implement B's getter to return A.keypath, and declare B as >> dependent on A: >> >> - (NSString*) b {return A.keypath; } >> + (NSArray*) keyPathsForValuesAffectingB { return [NSArray arrayWithObject: >> @"a"]; } > > keyPathsForValuesAffecting looks like what I am looking for.
Except note that it should return an NSSet, not an NSArray. + (NSSet*) keyPathsForValuesAffectingB { return [NSSet setWithObject:@"a"]; } Regards, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) 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/archive%40mail-archive.com This email sent to arch...@mail-archive.com