what's nicest proceed observer/observable objective-c (iphone version)


i'm used coding java representation uis, those have properties change, wish your ui update, exercise observer/observable pattern. java customarily carrying your category say list listeners notifies opposite events.



i've played objective-c mac, kvc contracting seems work unequivocally nicely, requires reduction code. iphone sdk doesn't seem have functionality though, doubt is:
if i have category binds information changes, what's best proceed me register ui member category told changes information needs display?



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