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Removing Observers

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Removing Observers

Subject: Removing Observers
From: Ryan Brown <email@hidden>
Date: Mon, 18 Aug 2008 14:23:38 -0400

What is the best way to remove a KVO observer if you aren't sure if the object already has an observer registered? Currently I'm catching the exception raised for an unregistered observer using something like:

@try { [object removeObserver:observerObject forKeyPath:keyPath]; }
@catch(NSException *exception) {}

This seems like a fairly kludgey way to do it though, and apparently the exception isn't raised on 10.4 (it instead either crashes or does nothing).

Best,
Ryan
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