从string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类定义和静态方法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可能导致泄漏,因为它的选择器是未知的",你可以忽略这一点(详见这个问题):

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