You must call remove as many times as you call add. Otherwise, subclasses and superclasses would interfere with each other's observations.
-Heath Borders heath.bord...@gmail.com Twitter: heathborders http://heath-tech.blogspot.com On Fri, Aug 26, 2011 at 4:34 AM, Rick Mann <rm...@latencyzero.com> wrote: > Is -addObserver:forKeyPath:… idempotent? I called it multiple times with the > same parameters, but called -removeObserver:forKeyPath: only once, and the > object continued to receive KVO notifications. > > After adding code to ensure -addObserver:forKeyPath:… was only called once, > -removeObserver:forKeyPath: seemed to work as expected. > > I couldn't find any clear indication in the docs or searching online, > although I did find some things that indicate these APIs rather do suck. > > -- > Rick > > _______________________________________________ > > 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/heath.borders%40gmail.com > > This email sent to heath.bord...@gmail.com > _______________________________________________ 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
