How to “pass on” a variable number of arguments to NSString's +stringWithFormat:

Question

I would like to write a function in Objective-C such as the one below, that takes a variable number of arguments, and passes those arguments on to +stringWithFormat:

Answer 1

initWithFormat:arguments:

NSString *estr(NSString *format, ...) {
    va_list args;
    va_start(args, format);
    NSString *s = [[[NSString alloc] initWithFormat:format arguments:args] autorelease];
    va_end(args);
    return s;
}

they don't seem to have a convenience constructor "stringWith..." version