... 基础模块 Foundation Modules 类别管理 Category Implementation 类别管理的实施 Category Management Implementation ...
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When using KVO in a category implementation, it is recommended that a custom associated-object be used as an observer, rather than the object observing itself.
当在一个category的实现中使用 KVO时，建议用一个自定义的关联对象而不是该对象本身作观察者。
When using KVO in a category implementation, it is recommended that a custom associated-object be used as an observer, rather than the object observing itself.
当在一个category的实现中使用KVO时，建议用一个自定义的关联对象而不是该对象本身作观察者。
The client service is agnostic to how the service is implemented — whether rules or some other implementation technology — and to which rule category is used, when there is a choice.
客户机服务不知道其所使用的服务是如何实现的——是否采用规则或其他实现技术——也不知道规则所属的规则类别、何时存在选择。
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