Q:

Objective C calling method dynamically with a string

Im just wondering whether there is a way to call a method where i build the name of the method on the fly with a string.
e.g. I have a method called loaddata
-(void)loadData;

to call this i would normally call it like
[self loadData];

But i want to be able to call it dynamically with a string e.g.
NSString *methodName = [[NSString alloc] initWithString:@"loadData"];
[self methodName];

This is a stupid example but i hope you get my point. I am using it for databinding classes that I am setting up for my IPad application. Hard to explain but to get it to fire I need to work out how to call a method with a string.
Any ideas?
Thanks

A:

You can try something like 
SEL s = NSSelectorFromString(selectorName);
[anObject performSelector:s];

A:

You can use the objc_msgSend function.  It takes two parameters, the receiver and the selector to send to it:
objc_msgSend(self, someSelector);

You'll need to turn your string into the appropriate selector using NSSelectorFromString:
NSString *message = [self getSomeSelectorName];
objc_msgSend(self, message);

The method also takes a variable number of arguments, so you can send messages with any number of arguments.
NSString *message = [self getSomeSelectorNameWithManyArguments];
objc_msgSend(self, message, arg1, arg2, arg3, arg4);

