How to override a variadic method in Objective-C

问题

I'm trying to extend a class that has a variadic method such as:

- (void)someMethod:(id)arguments, ... ;

and in the subclass override it by calling the original method like:

- (void)someMethod:(id)arguments, ... {
    [super someMethod:arguments, ...];

    // override implementation
    ...
}

but this doesn't work. Anyone know how to work this? Thanks.

回答1:

similar to printf/vprintf, the base would declare:

- (void)someMethod:(id)arguments, ... ;

the subclass would implement:

- (void)vsomeMethod:(id)arguments vaList:(va_list)vaList;

then the base would just call vsomeMethod:vaList: in its implementation of someMethod:vaList:.

来源：https://stackoverflow.com/questions/9562361/how-to-override-a-variadic-method-in-objective-c