摘要:
原文:http://www.duckrowing.com/2010/05/21/using-the-singleton-pattern-in-objective-c/感谢作者what the purpose of the +allocWithZone override is?+allocWithZone is overridden to make sure you can only allocate a single instance of this object. All subsequent calls should return nil.I don't think you' 阅读全文
posted @ 2012-05-11 16:03
pengyingh
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