在Objective-C中，给定一个ID，我如何分辨它指向的对象类型? [英] In Objective-C, given an id, how can I tell what type of object it points to?

问题描述

Objective-C新手问题.给出以下(虚构的)代码:

Objective-C newbie question. Given the following (fictional) code:

id mysteryObject = [anotherObject mysteriousMethod];

如何在运行时确定mysteryObject是什么类?

How can I determine at runtime what class mysteryObject is?

推荐答案

[mysteryObject class]

将为您提供类对象.但是，通常，您需要做一些OOPy操作，例如检查是否符合某些协议或接口.

will get you the class object. However, generally you want to do something OOPy like check for conformance to some protocol or interface.

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