Re: Correct way to overide synthesized setter?
Re: Correct way to overide synthesized setter?
- Subject: Re: Correct way to overide synthesized setter?
- From: Chris Tracewell <email@hidden>
- Date: Sun, 28 Feb 2010 09:45:16 -0800
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"]; }
—Jens
Jens -
keyPathsForValuesAffecting looks like what I am looking for.
Thank you
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