Question

I made a xcode project where i did some security stuff and they asked me to obfuscate the method names

like so

#define specialMethod a9328238
+(void) specialMethod
{
   // do security stuff
}

i made a .framework library from the project ( project A ) and included it into another project ( project B ).

but when i run (project B) with a Release build configuration it always crashes like so.

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[SecurityClass a9328238]: unrecognized selector sent to class 0x337cc4'

so it crashes when it tries to acces the method.

But when i run (project B) it with a Debug build configuration it runs smooth

(i have kept all my build configuration settings as default)

Answer 1

Where have you placed the #define for obfuscation ? Is it in the header file (.h) or in the implementation file (.m) of the framework ?

For the obfuscation to be effective, it must be placed in a file that is both included by the implementation and the caller.

You can also check that the pre-processing is ok by inspecting the pre-processed file. Select the implementation file and go to the menu Product > Generate Output > Generate Preprocessed File (you can select the configuration at the bottom of the screen).