Dynamically call static method on class from string

Question

I have two strings:

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

MyClass class definition and static method doSomething also exists.

How can I trigger [MyClass doSomething] dynamically, from two strings?

Community · Accepted Answer · 2017-05-23 12:34:39Z

23

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

This will get you a warning "PerformSelector may cause a leak because its selector is unknown", which you can ignore like this (see this question for details):

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

edited May 23, 2017 at 12:34

CommunityBot

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answered Dec 5, 2013 at 12:45

DrummerB

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Comments

Community · Accepted Answer · 2017-05-23 12:10:12Z

4

You just have to use

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

here is also a related post

edited May 23, 2017 at 12:10

CommunityBot

11 silver badge

answered Dec 5, 2013 at 12:46

Alex Cio

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