iphone: get User Defined variable in Target's setting by code?

Question

My project have multi-targets. Each target has its own Class file for setting stuff. I want to store that Class name in a target setting (Info.pl

Answer 1

You can not directly use a variable defined in the build settings. These variables are meant to be used by build tools.

Instead define a preprocessor macro in the Preprocessor Macros Variable like 'MYVAR=5'. You can access these macros in your code like:

#if MYVAR==5
    //Do something
#endif

Please note, that the evaluation of these expressions happens at build-time not at runtime.

It is very typical use to just define a Macro without caring for the value. For example define 'DEBUG=1' in the debug build settings and 'RELEASE=1' in the release build settings.

You can then test using #ifdef or #ifndef

#ifdef DEBUG
    // Log
#endif