Cannot find NSDiffableDataSourceSectionSnapshot in Catalyst

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Created Sep ’20

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Cannot find NSDiffableDataSourceSectionSnapshot when selecting the target for macOS catalyst, but the document describes it can be used in macOS catalyst 14+.

Can I use it in public Xcode12? (that will be released in tomorrow...)

Environment

Xcode12 GM(12A7209)

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hacknicity OP

Sep ’20

Accepted Answer

It seems that Xcode 12 GM can't build Mac Catalyst apps which use classes/properties etc. that were added in iOS 14. I get a similar error in one of my apps when I try and build the Catalyst version:

unknown type name 'UISplitViewControllerSplitBehavior'

Xcode 12 beta 6 will build fine but, of course, can't be used to submit for review.

I can build a different app for Catalyst on Xcode 12 GM, presumably because that code doesn't use iOS 14 features.

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