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:. I know about vsnprintf, but that would imply converting the NSString 'format' to C and back (and would also mean converting the formatting placeholders within it as well...).

The code below compiles, but of course does not behave as I want :)

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

Basically: is there a va_list-friendly version of the +stringWithFormat: method, or is it possible to write one?

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