Swift - Assign HTML to NSAttributedString with custom FONT

HtmlToAttributedString.swift

//Usage
lbl.attributedText = htmlToAttributedString ("html text")

//Assign attributed string
    func htmlToAttributedString(string : String) -> NSAttributedString{
        var attribStr = NSMutableAttributedString()
        
        do {//, allowLossyConversion: true
            attribStr = try NSMutableAttributedString(data: string.dataUsingEncoding(NSUnicodeStringEncoding)!, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)
            
            let textRangeForFont : NSRange = NSMakeRange(0, attribStr.length)
            attribStr.addAttributes([NSFontAttributeName : UIFont(name: "Arial", size:15)!], range: textRangeForFont)
            
        } catch {
            print(error)
        }
        
        return attribStr
    }

It does not seem to work.

It does not seem to work.

The code below worked for me.

First it converts html string to default attributed string; then it enumerates font attribute in the result string, replace the system default font with your custom font; then finally add your new font as a new attribute.

guard let attributedString = try? NSMutableAttributedString(data: Data(htmlString.utf8),
                                                                            options: [.documentType: NSAttributedString.DocumentType.html,
                                                                                      .characterEncoding: String.Encoding.utf8.rawValue],
                                                                            documentAttributes: nil)
                else {
                    return .init(string: "Invalid content")
                }
                
                let range = NSRange(location: 0, length: attributedString.length)
                
                attributedString.enumerateAttribute(.font, in: range) { value, range, pointer in
                    guard let currentFont = value as? UIFont else { return }
                    
                    let isBold = currentFont.fontName.lowercased().contains("bold")
                    let replacementFont = UIFont(name: isBold ? "Arial-Bold" : "Arial", size: currentFont.pointSize)
                    
                    let replacementAttribute = [NSAttributedString.Key.font: replacementFont]
                    attributedString.addAttributes(replacementAttribute, range: range)
                }
                
                return attributedString

Thank you . I will check and update accordingly. Thanks for your help and improving it.

…

On Sat, Jul 30, 2022 at 4:43 AM Aimer ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ The code below worked for me. First it converts html string to default attributed string; then it enumerates font attribute in the result string, replace the system default font with your custom font; then finally add your new font as a new attribute. guard let attributedString = try? NSMutableAttributedString(data: Data(htmlString.utf8), options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil) else { return .init(string: "Invalid content") return } let range = NSRange(location: 0, length: attributedString.length) attributedString.enumerateAttribute(.font, in: range) { value, range, pointer in guard let currentFont = value as? UIFont else { return } let isBold = currentFont.fontName.lowercased().contains("bold") let replacementFont = UIFont(name: isBold ? "Arial-Bold" : "Arial", size: currentFont.pointSize) let replacementAttribute = [NSAttributedString.Key.font: replacementFont] attributedString.addAttributes(replacementAttribute, range: range) } return attributedString — Reply to this email directly, view it on GitHub <https://gist.github.com/fa832a15c6cb38b65f6fb4f74462b819#gistcomment-4249862>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADXGP54O5MRTP4G36X3ZGETVWRQSBANCNFSM5Z5K2HTA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

-- *Regards* *---------------------------------------------------------------------------------------* [image: facebook] <https://www.facebook.com/Vlogboard/> [image: twitter] <https://twitter.com/myvlogboard> [image: linkedin] <https://www.linkedin.com/in/pm-rakeshkumar> [image: instagram] <https://www.instagram.com/vlogboard> Rakesh Kumar Project Manager Information Technology | Baltech Working Hours: 9.30 am to 7.30 pm 9950626730 ***@***.*** http://www.vlogboard.com Jaipur

The both of these gists would break markdown. For example monospace and italic text style. This could help, but not working with custom fonts https://stackoverflow.com/a/33828793/5790492

Maybe someone need only to change the size of default font https://stackoverflow.com/a/74841172/5790492

Hi As this is old code and I'm currently not maintaining it. I will check it and get it fixed though. Thank you for finding the bug in relation to latest version. Appreciate it.

…

On Sun, Dec 18, 2022 at 3:34 PM Nike Kov ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ The both of these gists would break markdown. For example monospace and italic text style. This could help, but not working with custom fonts https://stackoverflow.com/a/33828793/5790492 — Reply to this email directly, view it on GitHub <https://gist.github.com/fa832a15c6cb38b65f6fb4f74462b819#gistcomment-4406541> or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADXGP566WPQJO6CXB4W3UX3WN3ORFBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFQKSXMYLMOVS2I5DSOVS2I3TBNVS3W5DIOJSWCZC7OBQXE5DJMNUXAYLOORPWCY3UNF3GS5DZVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVAZTONJUGQ3TEMFHORZGSZ3HMVZKMY3SMVQXIZI> . You are receiving this email because you authored the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .

-- *Regards* *---------------------------------------------------------------------------------------* [image: facebook] <https://www.facebook.com/Vlogboard/> [image: twitter] <https://twitter.com/myvlogboard> [image: linkedin] <https://www.linkedin.com/in/pm-rakeshkumar> [image: instagram] <https://www.instagram.com/vlogboard> Rakesh Kumar Project Manager Information Technology | Baltech Working Hours: 9.30 am to 7.30 pm 9950626730 ***@***.*** http://www.vlogboard.com Jaipur