目标-C-安全等级有哪些用途? [闭门]
原文：Objective-C - What are some uses of the NSProxy class? [closed]

特殊产品类的某些用途是什么。 为什么你们想要能够描述一个没有的物体?

国家安全局如何“向另一个物体转变”?
原文：How does NSProxy "transform itself into another object"?

The NSProxy Class Reference says this: Typically, a message to a proxy is forwarded to the real object or causes the proxy to load (or transform itself into) the real object. How exactly would the ...