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，因为它的选择器未知”，你可以忽略这一点（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

Answer 2

你只需要使用

[NSClassFromString(className) performSelector:NSSelectorFromString(methodName)];

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