How can I conditionally compile code for Catalyst?

Question

I'm working on porting an iOS application to Catalyst. The Catalyst (Mac) version will have its own target.

Is there an official way to conditionally compile code just for Catalyst? Otherwise, I can add a target-specific define, but it would be better to use something more general.

Did you see https://developer.apple.com/documentation/xcode/creating_a_mac_version_of_your_ipad_app - it shows what you can do. — rmaddy, Oct 08 '19 at 18:35
I did read that, but I don't see anything about conditional compilation there. — Bill, Oct 08 '19 at 18:37

score 30 · Answer 1 · answered Oct 08 '19 at 18:39

30

As seen in the documentation Creating a Mac Version of Your iPad App, you do:

Swift:

#if targetEnvironment(macCatalyst)
    // Code specific to Mac.
#else
    // Code to exclude from Mac.
#endif

Objective-C:

#if TARGET_OS_MACCATALYST
    // Code specific to Mac.
#else
    // Code to exclude from Mac.
#endif

answered Oct 08 '19 at 18:39

rmaddy

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1

Thanks! I was specifically looking for Objective-C and didn't see the answer there. I should have specified that in my question. – Bill Oct 08 '19 at 18:41
1

It's right there in the link I provided. Just select Objective-C instead of Swift at the top of the page. – rmaddy Oct 08 '19 at 18:46
3

If using this in the bridging header, you also need to `#import ` – albianto Mar 25 '20 at 09:55
Hey, do you know if there is a way to target specific mac versions? – CristianMoisei Oct 21 '20 at 21:21

score 3 · Answer 2 · answered Sep 23 '21 at 15:20

3

It is also possible to run code that is excluded from macCatalyst without having to use the #else. Note the use of ! (not).

#if !targetEnvironment(macCatalyst)
    print("This code will not run on macCatalyst")
#endif

answered Sep 23 '21 at 15:20

skymook

3,401
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How can I conditionally compile code for Catalyst?

2 Answers2