objective-c - 从字符串动态调用类的静态方法

Question

我有两个字符串:

NSString * className = "MyClass";
NSString * methodName = "doSomething";

MyClass 类定义和 static 方法 doSomething 也存在。

如何从两个字符串动态触发 [MyClass doSomething]？

Answer 1

Class class = NSClassFromString(@"MyClass");
SEL selector = NSSelectorFromString(@"doSomething");
[class performSelector:selector];

这会给你一个警告“PerformSelector 可能会导致泄漏，因为它的选择器是未知的”，你可以像这样忽略它(详见 this question):

Class class = NSClassFromString(@"MyClass");
SEL selector = NSSelectorFromString(@"doSomething");    

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[class performSelector:selector];
#pragma clang diagnostic pop