macOS Executing code in an NSString

What kind of code is it?

While objective-c does allow you to dynamically load frameworks, it does not allow for dynamic execution of arbitrary code. It is not an interpreted language, code must be compiled into a binary object.

-Lee

Well, it's not straightforward, and probably impossible on iOS. Objective C must be compiled to run, and I assume this is raw source code, yes?

If it's an OS X app, and you're feeling adventurous, you might look into something like f-script.

I can point you to objc_loadModules that you can search for... I suppose you could use system or NSTask to invoke gcc, then load the object file with the function mentioned above. This seems quite involved though. Perhaps you could give some background and another method such as distributing a bundle, loading with NSBundle, then executing the new code (though this is still involved) could be suggested? Assuming your end users have a compiler and libraries installed is ill-advised.

-Lee

EDIT: Hadn't really looked at f-script. Looks fancy, and if that will do the job for you it's probably better than the options I mentioned.

You could JIT-compile ObjC code in-process using clang's libraries.