Re: keyPathsForValuesAffectingValueFor<key>: not updating immediately
Re: keyPathsForValuesAffectingValueFor<key>: not updating immediately
- Subject: Re: keyPathsForValuesAffectingValueFor<key>: not updating immediately
- From: "I. Savant" <email@hidden>
- Date: Tue, 27 Oct 2009 12:22:18 -0400
On Oct 26, 2009, at 10:03 PM, Brad Gibbs wrote:
I did read the documentation, which is why I used
+keyPathsForValuesAffectingFullAddress. I also tried
+keyPathsForValuesAffectingValueForFullAddress:
Both methods work, but only after changing the view and then coming
back to it.
Read it again. More carefully. I'll do the same.[1] ;-)
You've gotten several very important things wrong. I just saw Jim's
response, so I'll reiterate his point then the other issues:
1 - You did not pay close attention to the method signature as noted
in the API reference. As Jim indicated, it's a class method, not an
instance method (+ vs. -).
2 - +keyPathsForValuesAffectingValueForFullAddress: is completely
wrong. You appear to be bastardizing the +
keyPathsForValuesAffectingValueForKey: method. This is a separate
method which I encourage you to read about.
3 - The correct signature is the first one you used. It's meant to be
read in the docs as "+keyPathsForValuesAffecting<InsertYourKeyInAKVC-
CompliantWayHere>". You then changed it (see #1) and made it wrong as
well.
4 - If it only works when "changing the view" (I assume you mean some
action that causes it to redraw), then it doesn't work. Right? The
whole purpose of the collective Cocoa Bindings mechanism is to avoid
this very issue, so clearly your approach is not working.
[1] I now realize I myself was not reading or responding carefully
when looking for that phrase yesterday evening.
+keyPathsForValuesAffectingValueForKey: is the method that cannot be
overridden in a category; +keyPathsForValuesAffecting<key> is fine in
categories.
--
I.S.
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