How do I write universal Swift code for both iOS and macOS. In cocoa I could use #ifdef, what do I do now?

macros swift import preprocessor conditional-compilation

Use:

#if os(OSX)    import Cocoa#elseif os(iOS)    import UIKit#endif

macros swift import preprocessor conditional-compilation

Since os(OSX) does not work any more on Swift 5/Xcode 12 use:

#if os(macOS)    import Cocoa#elseif os(iOS)    import UIKit#endif

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