cocoa多线程初级

文章出处:? http://www.xprogress.com/post-36-threading-tutorial-using-nsthread-in-iphone-sdk-objective-c/

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引用: http://www.cocoachina.com/bbs/read.php?tid-14867.html

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翻译并说明: http://www.yifeiyang.net/iphone-developer-advanced-11-multiple-threads-of-use-and-precautions/