How to create variable argument methods in Objective-C

What these are called, generally, is \"variadic functions\" (or methods, as it were).\n\nTo create this, simply end your method declartion with , ..., as in \n\n- (void)logMessage:(NSString *)message, ...;\n\n\nAt this point you probably want to wrap it in a printf-like function, as implementing one of those from scratch is trying, at best.\n\n- (void)logMessage:(NSString *)format, ... {\n va_list args;\n va_start(args, format);\n NSLogv(format, args);\n va_end(args);\n}\n\n\nNote the use of NSLogv and not NSLog; consider NSLog(NSString *, ...); vs NSLogv(NSString *, va_list);, or if you want a string; initWithFormat:arguments: on NSString *.\n\n\n\nIf, on the other hand, you are not working with strings, but rather something like\n\n+ (NSArray *)arrayWithObjects:(id)object, ... NS_REQUIRES_NIL_TERMINATION;\n\n\nthings get a lot easier.\n\nIn that case, instead of a vprintf-style function, use a loop going through args, assuming id as you go, and parse them as you would in any loop.\n\n- (void)logMessage:(NSString *)format, ... {\n va_list args;\n va_start(args, format);\n\n id arg = nil;\n while ((arg = va_arg(args,id))) {\n /// Do your thing with arg here\n }\n\n va_end(args);\n}\n\n\nThis last sample, of course, assumes that the va_args list is nil-terminated.\n\nNote: In order to make this work you might have to include <stdarg.h>; but if memory serves, this gets included in connection with NSLogv, meaning it comes down by way of \"Foundation.h\", therefore also \"AppKit.h\" and \"Cocoa.h\", as well as a number of others; so this should work out of the box.",

- (void)methodWithFormat:(NSString*)format, ... {\n va_list args;\n va_start(args,format);\n //loop, get every next arg by calling va_arg(args,<type>)\n // e.g. NSString *arg=va_arg(args,NSString*) or int arg=(args,int)\n va_end(args);\n}\n\n\nIf you want to pass the variable arguments to stringWithFormat:, use something like:\n\nNSString *s=[[[NSString alloc] initWithFormat:format arguments:args] autorelease];\n",