问如何显示iclouds的特定文件格式

EN

 @IBAction func moveiclouds_BtnClick(_ sender: Any) {
        let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypePDF as String, "com.microsoft.word.doc", "com.microsoft.excel.xls", kUTTypeCompositeContent as String, kUTTypeJPEG as String], in: .import)
        documentPicker.delegate = self
        self.present(documentPicker, animated: true, completion: nil)
    }


extension CreateFeesView: UIDocumentPickerDelegate{
    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
        let cico = url as URL
        cico_files = cico
        filepath_fees = url.pathExtension
    }
}