method_missing-like functionality in objective-c (i.e. dynamic delegation at run time)

Question

I\'m trying to transform one method call into another dynamically (at runtime).

For instance, I\'d like the following:

[obj foo]

t

Answer 1

You can use the method -forwardInvocation: for that. It takes a full NSInvocation object which represents the method call, and you can handle it however you wish. If you do this, you should also override -methodSignatureForSelector: to return the correct NSMethodSignature (required for -forwardInvocation: to work on unknown selectors). It's also recommended that you override -respondsToSelector: to declare that you can handle the selector in question.