Will new SwiftUI features back port to iOS13?

Question

Created Jun ’20

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I really really really want to write some new features for my company's app using SwiftUI. If I develop features using SwiftUI in Xcode 12, when iOS 14 is released, will that code be deployable to iOS13?

If no, what won't back port? Would it just be the same as if I used Xcode 11?

I can probably nudge my company to require iOS13 in the fall, but no way can I get them to require iOS14.

David

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Answer 1

ralf.ebert OP

Jun ’20

If you only use API that was already available with iOS 13, yes. You'll have to be careful about not using API that was newly introduced with iOS 14, like f.e. the newly added TextEditor would be forbidden / you'd have to write the code in way that the newly added APIs are only used on iOS 14 using code like 'if #available(iOS 14, *) { ... }' . Xcode will warn about these if you set iOS 13 as development target, you can also look it up using the documentation under 'Availablility' (f.e. for https://developer.apple.com/documentation/swiftui/texteditor ). Also you'll have to spend some effort to properly test the app both on iOS 13 and iOS 14 because you might encounter bugs that are only visible on one of the versions.

Greetings,
Ralf

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