Sharing Constants Between Cocoa and Cocoa-Touch apps

I have a class that I want to share between two different applications. The only real difference is the base framework it references. Cocoa imports and of course Cocoa-Touch imports . I would like to use a precompiler directive to check what I am compiling to and allow the correct import. What can I check to see if what My target is? or is there a 开发者_JS百科better way to do this?

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#ifdef TARGET_OS_IPHONE