如何使用保存其名称的String访问属性/变量 [英] How to access a property/variable using a String holding its name

问题描述

如果我在Objective C中有两个变量，就像这样，其中一个保存另一个的名称为字符串

If I had two variables in Objective C like this where one holds the name of the other as a string

NSInteger result = 4;
NSString * theName = @"result";

我最好如何使用字符串而不是变量的引用访问第一个变量？例如，如果我有很多变量，并生成一个我需要的代码的名称，我需要一个方法来获取到该变量使用该字符串。

How would I best access the first variable using the string instead of a reference to the variable? For instance if I had a lot of variables and would generate the name of the one I need by code I'd need a way to get to the variable using that string.

推荐答案

虽然没有直接回答您的问题，可以通过

Though not directly answering your question, it's possible to access properties (or ivars) of an object by

[object setValue:@"value" forKey:theName]

[object valueForKey：theName] （感谢kevboh！）

Similarly, the getter is [object valueForKey:theName] (thanks kevboh!)

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