variadic param method wrapper ios objective-c [duplicate] - ios

Question

I'm developing a static library that will be distributed to other developers, who may need debug statements. So I have several levels of logging.
In order to avoid constant appearance of
if(loggingLevelCurrentlySet >= loggingLevelWantedForThisInstance){
NSLog(#"log this");
}
I created a set of logging function wrappers. A simplified version looks like this:
void myLog(int logLevel, NSString *format, va_list args){
if((loggingLevelCurrentlySet >= logLevel)){
NSLogv(format, args);
}
}
void myLogLevel1(NSString *format, ...){
va_list args;
va_start(args, format);
myLog(1, format, args);
va_end(args);
}
void myLogLevel2(NSString *format, ...){
va_list args;
va_start(args, format);
myLog(2, format, args);
va_end(args);
}
etc.
But now, I want, from within myLog, access to the fully formated string to do something else with.
void myLog(int logLevel, NSString *format, va_list args){
NSString *fullString = [NSString stringWithFormat:format, args]; //crashes when args is anything but an empty list
CFStringRef cfsr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, format, args); //also crashes
//want to use the string here
if((loggingLevelCurrentlySet >= logLevel)){
NSLogv(format, args);
}
}

Answer 1

NSString *fullString = [[[NSString alloc] initWithFormat:format arguments:args] autorelease];
There is a method for that ;)
Although I suggest not to use functions, but some simple macro definitions:
#define myLogLevel1(format, ...) myLog(1, format, __VA_ARGS__)
#define myLogLevel2(format, ...) myLog(2, format, __VA_ARGS__)