In iOS 11 UIDocumentMenuViewController is marked as deprecated.
It is recommended to use UIDocumentPickerViewController, which existed before and has only a subset of UIDocumentMenuViewController functionality (in previous versions it was invoked by UIDocumentMenuViewController).
I can't see that something new was added to it so that it can augment removal of UIDocumentMenuViewController.
Somehow I doubt that iOS 11 removed such an important feature without offering some new way to do it, but I can't see it right now, so does anyone know something regarding this?