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iosxcodemacosconditional-compilation

What #defines are set up by Xcode when compiling for iPhone

I'm writing some semi-portable code and want to be able to detect when I'm compiling for iPhone. So I want something like #ifdef IPHONE_SDK....

Presumably Xcode defines something, but I can't see anything under project properties, and Google isn't much help.

Solution

  • It's in the SDK docs under "Compiling source code conditionally"

    The relevant definitions are TARGET_OS_IPHONE (and he deprecated TARGET_IPHONE_SIMULATOR), which are defined in /usr/include/TargetConditionals.h within the iOS framework. On earlier versions of the toolchain, you had to write:

    #include "TargetConditionals.h"

    but this is no longer necessary on the current (xCode 6/iOS8) toolchain.

    So, for example, if you want to only compile a block of code if you are building for the device, then you should do

    #if !(TARGET_OS_SIMULATOR)
...
#endif