objective-c preprocessor directives

How do I write the following in 开发者_开发知识库the preprocessor directive language?

if (isfullversion and isproduction)

else if (isliteversion)

end if

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You should be able to write the conditions you already have for the preprocessor if you want, rather than just checking if they are defined.

#if (isfullversion && isproduction)

#elif (isliteversion)

#endif

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You create separate targets. one for the lite version, one for the full version, then add compiler flags like -DLITE then check #ifdef LITE in your code.