Cannot find UIDocumentPickerViewController in scope

Question

I am completely new to iOS or Mac development, and I am trying to implement opening and reading files in an app for MacOS. By default I had my app use SwiftUI. Looking up how to implement such a functionality using SwiftUI I saw suggestions to use UIDocumentPickerViewController. However I cannot find a proper documentation as to how to use it in practice. Apple's documentation page is not informative at all -- it doesn't provide any information as of how to actually use this class.

Trying to follow some examples I found elsewhere on the Internet, I am now stuck with getting Cannot find UIDocumentPickerViewController in scope compilation error. I have tried importing UIKit, AppKit, CoreServices, MobileCoreServices, Cocoa but nothing seems to help -- extending the class as described in another StackOverflow answer just fails with the same compilation error.

How do I properly use UIDocumentPickerViewController, or how do I implement the same functionality using some other method if this one is wrong?

@matt Thank you for your answer. Could you suggest what would be the alternative I should use for the Mac app? — saferif, Dec 29 '20 at 01:58
@saferif There is no document picker other than NSOpenPanel for macOS AFAIK — Leo Dabus, Dec 29 '20 at 02:05
Use to do what? I do not know what you are trying to do. If the idea is to let the user pick a file to open, that is an NSOpenPanel. But really I'm totally in the dark as to your intentions. — matt, Dec 29 '20 at 02:05

score 0 · Accepted Answer · answered Jan 18 '21 at 21:58

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Apparently UIDocumentPickerViewController is not available when building for Mac OS X, and NSOpenPanel seems to be a way to get the necessary functionality.

answered Jan 18 '21 at 21:58

saferif

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Cannot find UIDocumentPickerViewController in scope

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