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Chain of Responsibility(Chapter 17 of Pro Objective-C Design Patterns for iOS)

You’d naturally think about using the pattern when
􀀁 There is more than one object that may handle a request and the handler is known only at runtime.
􀀁 You want to issue a request to a group of objects without specifying a particular receiver that will handle the request explicitly.

posted on 2012-05-08 14:35  Ray Z  阅读(227)  评论(0编辑  收藏  举报