P i P i - 3 months ago 12
iOS Question

Xcode / iOS: How to determine whether code is running in DEBUG / RELEASE build?

I am making an app that processes sensitive credit card data.

If my code is running in debug mode I want to log this data to the console and make some file dumps.

However on the final appstore version (ie when it is running in release mode) it is essential all of this is disabled (security hazard)!

I will try to answer my question as best I can; so the question becomes 'Is this solution path the right or best way to do it?'

// add `IS_DEBUG=1` to your debug build preprocessor settings

#if( IS_DEBUG )
#define MYLog(args...) NSLog(args)
#else
#define MYLog(args...)
#endif

Answer

Check your project's build settings under 'Apple LVM - Preprocessing', 'Preprocessor Macros' for debug to ensure that 'DEBUG' is being set - do this by selecting the project and clicking on the build settings tab. Search for 'DEBUG' and look to see if indeed DEBUG is being set.

Pay attention though. You may see DEBUG changed to another variable name such as DEBUG_MODE.

Build Settings tab of my project settings

then conditionally code for DEBUG in your source files

#ifdef DEBUG

// Something to log your sensitive data here

#else

// 

#endif