Convert NSAttributedString into Data for storage

Question

I have a UITextView with attributed text and allowsEditingTextAttributes set to true.

I\'m trying to convert the attributed st

Answer 1

Please check it once this work for me. You can update font style and family also by using below functions.

 var htmlStr = "\n\n\n\n\n\n\n\n\n\n
This is pikes AsD this is finding error
\n\n\n"
    htmlStr = htmlStr.replacingOccurrences(of: "\n", with: "")
    htmlStr = htmlStr.replacingOccurrences(of: "\\", with: "")

//Send htmlStr to server and when you will get back it from
// then convert html string to attributed string by below line

    let str = Self.htmlToAttributedString(html: htmlStr,fontSize :17, fontName:"Times New Roman")
    self.tfEmail.attributedText = str


//Function for attributed string from html string
func htmlToAttributedString(html:String,fontSize:CGFloat = 15.0, fontName : String = "NunitoSans-Regular",ignorFontBold: Bool = false) -> NSAttributedString {
    let attr = (try? NSAttributedString(htmlString: html, font: UIFont(name: fontName, size: fontSize),ignorFontBold: ignorFontBold)) ?? NSAttributedString()
    return attr
}

//Extension for NSAttribute string
extension NSAttributedString {

convenience init(htmlString html: String, font: UIFont? = nil, useDocumentFontSize: Bool = false, ignorFontBold: Bool = false) throws {
    let options: [NSAttributedString.DocumentReadingOptionKey : Any] = [
        .documentType: NSAttributedString.DocumentType.html,
        .characterEncoding: String.Encoding.utf8.rawValue
    ]

    let data = html.data(using: .utf8, allowLossyConversion: true)
    guard (data != nil), let fontFamily = font?.familyName, let attr = try? NSMutableAttributedString(data: data!, options: options, documentAttributes: nil) else {
        try self.init(data: data ?? Data(html.utf8), options: options, documentAttributes: nil)
        return
    }

    let fontSize: CGFloat? = useDocumentFontSize ? nil : font!.pointSize
    let range = NSRange(location: 0, length: attr.length)
    attr.enumerateAttribute(.font, in: range, options: .longestEffectiveRangeNotRequired) { attrib, range, _ in
        if let htmlFont = attrib as? UIFont {
            let traits = htmlFont.fontDescriptor.symbolicTraits
            var descrip = htmlFont.fontDescriptor.withFamily(fontFamily)
            if ignorFontBold == false{
            if (traits.rawValue & UIFontDescriptor.SymbolicTraits.traitBold.rawValue) != 0 {
                descrip = descrip.withSymbolicTraits(.traitBold)!
            }

            if (traits.rawValue & UIFontDescriptor.SymbolicTraits.traitItalic.rawValue) != 0 {
                descrip = descrip.withSymbolicTraits(.traitItalic) ?? descrip
            }
            }
            attr.addAttribute(.font, value: UIFont(descriptor: descrip, size: fontSize ?? htmlFont.pointSize), range: range)
        }
    }

    self.init(attributedString: attr)
}

}