IOS Custom Document Type Icons

Can someone explain to me the difference between the UTTypeSize64IconFile and UITypeSize320IconFile keys in the UTExportedTypeDeclarations and CFBundleTypeIconFiles section in CFBundleDocumentTypes? I found several places in the docs that talk about CFBundleTypeIconFiles (for example, here: http://developer.apple.com/library/ios/#documentation/FileManagement/Conceptual/DocumentInteraction_TopicsForIOS/Articles/RegisteringtheFileTypesYourAppSupportsTefile.html only) I can find:

The name of the 64 x 64 pixel icon resource file (located in the application bundle) for communicating with this UTI. You should enable this key only for the types that your application exports.

which really didn't cover things for me.

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Source: https://habr.com/ru/post/1486275/


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