NSAttributedString tail truncation in UILabel

Question

I'm using ContextLabel to parse @ , # and URL's. This is the best solution i found, cause it sizes correctly and dont affect performance. It firstly parses string at input and than converts it to NSAttributedString and after this assigns it to attributedText property of UILabel. Everything works as expected, except tail truncation - it's very incorrect ( see pic below )

Where shall i start digging - is it wrong attributes on attributed string? Or label layout issue? Thanks!

Robinett

Are you hard coding the width of that label? – Happen

Answer 1

I had this problem and fixed it by adding a NSParagraphStyle specifying the desired line break mode:

    //assuming myString is an NSMutableAttributedString
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineBreakMode = .byTruncatingTail

    let range = NSRange(location: 0, length: myString.mutableString.length)
    myString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: range)

See Word wrap for NSMutableAttributedString for further reference.

Hardening

Answer 2

Following also works irrespective of using AttributedText or normal text.
Make sure to add the below line after setting the AttributedText and font to the label:

label.lineBreakMode = .byTruncatingTail

Kurrajong

You made my day! Thanks. Keyword - AFTER – Perilous

Answer 3

func htmlToAttributedString() -> NSAttributedString?
    {
        guard let data = data(using: .utf8) else { return nil }
        do
        {
            let paragraphStyle = NSMutableParagraphStyle()
            paragraphStyle.alignment = .left
            paragraphStyle.lineBreakMode = .byTruncatingTail
            
            
            let content = try NSMutableAttributedString(data: data, options: [.documentType:     NSAttributedString.DocumentType.html, .characterEncoding:     String.Encoding.utf8.rawValue], documentAttributes: nil)
            
            content.addAttributes([NSAttributedString.Key.paragraphStyle: paragraphStyle,
                                   NSAttributedString.Key.font: UIFont(name:"Poppins-Medium",size:18),
                                   NSAttributedString.Key.foregroundColor: UIColor(red: (94.0/255.0), green: (90.0/255.0), blue: (90.0/255.0), alpha: 1.0)],
                                  range: NSMakeRange(0, content.length))
            
            return content
        }
        catch
        {
            return nil
        }
    }

Hort