Using fileImporter to import cloud folders
I'm using fileImporter to let the user select a folder:
.fileImporter(
isPresented: viewStore.binding(\.$fileImporterPresented),
allowedContentTypes: [.folder],
allowsMultipleSelection: false
) { resources in
// Do something
}
On macOS 13 (SwiftUI, not Catalyst) everything works as expected.
On iOS 16.1 it shows an open action for a folder but I cannot access Dropbox.
When I add additional allowedContentTypes like .directory, or .volume then Dropbox is no longer greyed out but it is also no longer possible to select a folder:
Selecting a folder seems to only work when the only allowedContentType is .folder.
How do I configure fileImporter to select a folder on an iOS external cloud storage provider?
The problem seems to be with Dropbox not implementing NSExtensionFileProviderSupportsPickingFolders. That's why it's greyed out in the fileImporter but also in the UIDocumentPickerViewController.
More information: https://stackoverflow.com/a/71379422/225833
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