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	<title>Comments on: Defects of KVO</title>
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	<link>http://wangling.me/2010/07/defects-of-kvo/</link>
	<description>I&#039;m Wang Ling. I&#039;m wangling you.</description>
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		<title>By: Revv</title>
		<link>http://wangling.me/2010/07/defects-of-kvo/comment-page-1/#comment-142</link>
		<dc:creator>Revv</dc:creator>
		<pubDate>Sun, 18 Jul 2010 08:54:20 +0000</pubDate>
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		<description>On &quot;Unregistering an unregistered observer throws exception&quot;: will this happen if you keep in the observer a reference to the observee object. When you need to unregister it, you can get the right object to unregister. 

It make no sense you don&#039;t know which observee is when you unregister an observer, I think.</description>
		<content:encoded><![CDATA[<p>On &#8220;Unregistering an unregistered observer throws exception&#8221;: will this happen if you keep in the observer a reference to the observee object. When you need to unregister it, you can get the right object to unregister. </p>
<p>It make no sense you don&#8217;t know which observee is when you unregister an observer, I think.</p>
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