Switch on/off NSLog with a boolean just like CCLog in cocos2d - ios

Question

I have a IS_TESTING boolean flag indicating whether the current build is testing
I want to hide NSLog if IS_TESTING is NO. And it should also support a single string parameter.
This is CCLog from cocos2d:
#define __CCLOGWITHFUNCTION(s, ...) \
NSLog(#"%s : %#",__FUNCTION__,[NSString stringWithFormat:(s), ##__VA_ARGS__])
#define __CCLOG(s, ...) \
NSLog(#"%#",[NSString stringWithFormat:(s), ##__VA_ARGS__])
#if !defined(COCOS2D_DEBUG) || COCOS2D_DEBUG == 0
#define CCLOG(...) do {} while (0)
#define CCLOGWARN(...) do {} while (0)
#define CCLOGINFO(...) do {} while (0)
#elif COCOS2D_DEBUG == 1
#define CCLOG(...) __CCLOG(__VA_ARGS__)
#define CCLOGWARN(...) __CCLOGWITHFUNCTION(__VA_ARGS__)
#define CCLOGINFO(...) do {} while (0)
#elif COCOS2D_DEBUG > 1
#define CCLOG(...) __CCLOG(__VA_ARGS__)
#define CCLOGWARN(...) __CCLOGWITHFUNCTION(__VA_ARGS__)
#define CCLOGINFO(...) __CCLOG(__VA_ARGS__)
#endif // COCOS2D_DEBUG
This is what I write:
#define __CCLOG(s, ...) \
NSLog(#"%#",[NSString stringWithFormat:(s), ##__VA_ARGS__])
#if IS_TESTING == 0
#define CCLOG(...) do {} while (0)
#elif IS_TESTING == 1
#define CCLOG(...) __CCLOG(__VA_ARGS__)
#endif
use:
CCLOG(#"single string parameter");
CCLOG(#"string format %#", #"parameter");
It runs without crash, but nothing gets printed out.
EDIT:
#define IS_TESTING YES
I have tried
#if IS_TESTING == YES/NO, but still the same as 0/1, nothing gets printed out

Answer 1

Your code works perfectly. But IS_TESTING must be defined before you start the __CCLOG definition stuff.
So, in the .pch file, I wrote:
#define IS_TESTING 1
#define __CCLOG(s, ...) \
NSLog(#"%#",[NSString stringWithFormat:(s), ##__VA_ARGS__])
#if IS_TESTING == 0
#define CCLOG(...) do {} while (0)
#elif IS_TESTING == 1
#define CCLOG(...) __CCLOG(__VA_ARGS__)
#endif
And later:
CCLOG(#"%#", #"YES");
Since I have defined IS_TESTING to 1, we log. If I change it to 0, we don't.
As a bonus, I'll show you what I do. It's much simpler. Here it is:
#define MyLog if(0); else NSLog
This makes MyLog equivalent to NSLog. To turn off logging, change 0 to 1.