Difference between NSLog and NSLogv

Question

Can anyone explain the difference between NSLog and NSLogv? I know NSLog is used to print data in the console. But what is NSLogv?

Answer 1

Generally speaking, a suffix of v means that a function takes a va_list as an argument, instead of a variadic argument list.

This is the case for NSLog and NSLogv:

void NSLog(NSString *format, ...);

void NSLogv(NSString *format, va_list args);

This is useful in certain very specific situations where you need to "wrap" a function that takes variadic arguments. If you need it, you'll know. Otherwise, you can safely ignore it.