How to call class method from NSString in obj-c?

In obj-c, how can I call

[myClass myStri开发者_开发知识库ng];

where myString = @"myMethod";

Which should be the equivalent of [myClass myMethod];

Not sure if this kind of meta language manipulation is possible.

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[myClass performSelector: NSSelectorFromString(myString)];

Docs:

• -performSelector: sends the selector specified to the receiver
• NSSelectorFromString() converts an NSString into a selector (type SEL)

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[myClass class] returns the metaclass, class methods are called on the metaclass. E.g.

[NSString someClassMethod];

NSString *instanceOfString = @"some string instance";
[[instanceOfString class] someClassMethod];

EDIT: I misread the question. Use NSSelectorFromString to get a SEL from an NSString. That's documented in Apple's Foundation Functions Reference where you'll also see NSClassFromString, NSStringFromClass, NSStringFromSelector, NSStringFromProtocol and NSProtocolFromString amongst others.

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You can use NSSelectorFromString, something along the lines of the following should work:

 SEL selector = NSSelectorFromString(@"myMethod");
 [myClass performSelector:selector withObject:nil];

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SEL mySelector = NSSelectorFromString(@"myMethod");
[myClass performSelector:mySelector];

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Alternatively, in case you need more flexibility in argument and/or return types than performSelector: and friends will give you, have a look at the NSInvocation class.