Macro condition for iOS and OSX code

Question

I need to support iOS and OSX in my shared library, whats the best Macro / Practise for conditioning iOS and OSX code

the bellow code doesn't work for some reason :/

- (NSString *)hostName {
    #ifdef TARGET_OS_IPHONE
        return [[UIDevice currentDevice] name];
    #elif TARGET_OS_MAC
        return [[NSHost currentHost] localizedName];
    #endif
}

Are you looking to build two separate libraries (which is what you need to do with the code posted in your question), or are you looking for a runtime solution? — rmaddy, Jan 18 '15 at 18:33
Compiler directives can't be used for runtime checks. And I don't think you can build a shared library that supports both iOS and OS X. I believe you need two separate libraries since the processors are quite different. You might be able to build a single framework with separate slides for each. But either way, you end up compiling each separately. — rmaddy, Jan 18 '15 at 18:52

score 9 · Accepted Answer · edited May 23 '17 at 11:54

9

Two issues:

Use #if rather than #ifdef
Check TARGET_OS_IPHONE first since TARGET_OS_MAC is defined to 1 for both platforms

See: Which conditional compile to use to switch between Mac and iPhone specific code?

edited May 23 '17 at 11:54

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answered Jan 18 '15 at 18:51

EricS

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Macro condition for iOS and OSX code

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