MYVC.swift

extension MyViewController: UIDocumentMenuDelegate, UIDocumentPickerDelegate {
    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
        /// Handle your document 
    }
    func documentMenu(_ documentMenu: UIDocumentMenuViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {
        documentPicker.delegate = self
        documentPicker.modalPresentationStyle = .overCurrentContext
        present(documentPicker, animated: true, completion: nil)
    }
    func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
        /// Picker was cancelled! Duh 🤷🏻‍♀️
    }
}