rtf 字符串转 html 字符串.swift

func rtfDataToHtmlData(data: Data) -> Data? {
        let attributedString = NSAttributedString(rtf: data, documentAttributes: nil)!
        do {
            let htmlData = try attributedString.data(from: NSRange(location: 0, length: attributedString.length), documentAttributes: [NSAttributedString.DocumentAttributeKey.documentType:NSAttributedString.DocumentType.html])
            return htmlData
        } catch {
            
        }
        return nil
    }