Truncate string and add "..." in the end - SWIFT

truncate+string.swift

//Extension on String
extension String {

        func truncating(max:Int) -> String{
        
        let text = self
        print("passed text \(text)")
        
        if text.count >= max {
            let truncatedIndex = text.index((text.startIndex), offsetBy: max)
            let truncated = text.substring(to: truncatedIndex)
            let t = truncated.appending("...")
            
            print("truncated string", t.description)
            
            return t.description
            
        }else{
            return self
        }
     }
}

//Call 

label.text = textOfLabel.truncating(max: 24) //max 24