如何修复从HTML字符串快速转换NSAttributedString？

Question

When I convert html string to NSAttributedString, it works well normally but I have a problem in specific cases.

func htmlAttributed(family: String?, size: CGFloat, color: UIColor) -> NSAttributedString? {
        do {
            let htmlCSSString = "<style>" +
                "html *" +
                "{" +
                "font-size: \(size)px;" +
                "color: \(color.hex);" +
                "font-family: \(family ?? "Helvetica"), Helvetica;" +
            "}</style> \(self)"

            guard let data = htmlCSSString.data(using: String.Encoding.utf8) else {
                return nil
            }

            return try NSAttributedString(data: data,
                                          options: [.documentType: NSAttributedString.DocumentType.html,
                                                    .characterEncoding: String.Encoding.utf8.rawValue],
                                          documentAttributes: nil)
        } catch {
            return nil
        }
    }

This is my test case html string which has problem. <b>Hi <i>how are <u>you?</u></i></b>

And it's my result with NSAttributedString. how are you?

I wanted to get all bold in this sentence but I got only Hi bold string.

Answer 1

Seems to work. Color was changed to a String type for this quick test. Your function was included in a String extension. The following is the call to the function. Returned attributed string was converted to data, in MS Word format, resulting in the above final sentence, displayed in Word.

var s = "<b>Hi <i>how are <u>you?</u></i></b>"
var attr = s.htmlAttributed(family: nil, size: 20, color: "blue")

var MWdata = attr!.docFormat(from: NSRange(location: 0, length: attr!.length),documentAttributes: [NSAttributedString.DocumentAttributeKey(rawValue: "documentType"):NSAttributedString.DocumentType.docFormat])