How to do not write log on release mode in iOS?

Question

In my memory, there's some code that can let the NSLog not work when released.

I don't want to remove my NSLog in my code.It helps a lot on debug mode.

So I want to find a way that can leave them in my code, and also don't slow down the application when released.

Thanks for your help~~

Answer 1

A common way to remove all NSLog(…) call in a release is to create a macro that is between conditional preprocessor macro and compiles to nothing, something like this:

#ifdef RELEASE
# define NSLog(...) //remove loggin in production
#endif

Put this code in a .h file that is included in every other file, like a Defines.h that is #include'd in the prefix header (.pch).

RELEASE should be a preprocessor macro defined against the Release configuration in the "Build Settings" tab of your target.

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Answer 2

You will need to replace NSLog with a custom macro.

Put for instance

#ifdef DEBUG
#    define DLog(...) NSLog(__VA_ARGS__)
#else
#    define DLog(...) /* */
#endif
#define ALog(...) NSLog(__VA_ARGS__)

in your prefix pch file.

Use ALog for cases where you always want log output regardless of the state of the debug flag, and DLog for log only in debug mode.

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