当我使用以下代码复制文本时，它将粘贴简单文本。

let range = NSMakeRange(0,tvTexta.attributedText!.length)
            let rtfData = try! tvTexta.attributedText!.data(from: range,documentAttributes: [ NSAttributedString.DocumentAttributeKey.documentType: NSAttributedString.DocumentType.rtf])

            UIPasteboard.general.items = [
                [ kUTTypePlainText as String : tvTexta.text! ],[ kUTTypeRTF as String : rtfData ]
            ]