How to identify number of lines for dynamic length label required for given string?

Question

I have a UILabel with dynamic width and dynamic string which I am getting from server. Now I want to set this string to label as text. Also I need to set number of lines to label. As I am getting dynamic string so I am not sure how much characters can be set in a line.

I found similar answers but those are not giving me accuracy as I need.

if you found similar answers show your tried code so it becomes easy for other to answer in more covenant way — Prashant Tukadiya, Feb 08 '18 at 11:57
Have a look at this post https://iosnetwork.blogspot.in/2017/03/how-to-calculate-dynamic-height-of.html — Jayachandra A, Feb 08 '18 at 11:59

score 1 · Answer 1 · answered Feb 08 '18 at 12:03

1

Set number of lines to 0, this will make it dynamic. You also need to make your UILabel sizeToFitmyUiLabel.sizeToFit()

answered Feb 08 '18 at 12:03

Franco Fadini

11
3

score 0 · Answer 2 · answered Feb 08 '18 at 12:09

If you for some reason need the number of lines, you can use following extension on UILabel:

extension UILabel {

    func linesNeeded() -> Int {
        self.layoutIfNeeded()
        let myText = self.text! as NSString
        let boundingRectangle = CGSize(width: self.bounds.width, height: CGFloat.greatestFiniteMagnitude)
        let labelSize = myText.boundingRect(with: boundingRectangle,
                                            options: .usesLineFragmentOrigin,
                                            attributes: [NSAttributedStringKey.font: self.font],
                                            context: nil)
        return (labelSize.height / self.font.lineHeight)
    }
}

However, if you don't need the height, you just want to allow the label to show the whole text, you should set label.numberOfLines = 0 which will allow the label to grow as needed.

How to identify number of lines for dynamic length label required for given string?

2 Answers2