Change color of a certain word in UILabel

Question

I just want to change color of some word in my Label's string.

What I want to do is:

How Im trying to do:

But it doesnt work and it says: 'NSMutableRLEArray replaceObjectsInRange:withObject:length:: Out of bounds'

So I need an advice to do this easy thing, and I need a trick to do this. You guys can send your way.

Answer 1

Try this, your attributed string has no value when you try get the range of the string. You got to give the attributed string a string value before that. You

  let descriptionLabel: UILabel = {

      let label = UILabel()

      // String variable containing the text.
      let fullString = "mehmet alper tabak"

      // Choose wwhat you want to be colored.
      let coloredString = "alper"

      // Get the range of the colored string.
      let rangeOfColoredString = (fullString as NSString).range(of: coloredString)

      // Create the attributedString.
      let attributedString = NSMutableAttributedString(string:fullString)
      attributedString.setAttributes([NSForegroundColorAttributeName: UIColor.red],
                              range: rangeOfColoredString)
      label.attributedText = attributedString
     return label
   }()

   descriptionLabel.frame = CGRect(x: 50, y: 50, width: 140, height: 100)
   self.view.addSubview(descriptionLabel)

Or you can do an extension of UILabel.

  extension UILabel {

      func colorString(text: String?, coloredText: String?, color: UIColor? = .red) {

      let attributedString = NSMutableAttributedString(string: text!)
      let range = (text! as NSString).range(of: coloredText!)
      attributedString.setAttributes([NSForegroundColorAttributeName: color!],
                               range: range)
      self.attributedText = attributedString
  }

To use it.

      self.testLabel.colorString(text: "mehmet alper tabak",
                           coloredText: "alper")