Observer(Chapter 12 of Pro Objective-C Design Patterns for iOS)
摘要：
Defines a one-to-many dependency between objects so that whenone object changes state, all its dependents are notified and updated automatically. 阅读全文
posted @ 2012-04-24 17:04 Ray Z 阅读(272) 评论(0) 推荐(0) 编辑
