I am assigning value to
let cards:Card = cardArray as! Card
lblTitle?.text = cards.title
//Output in UiLabel is "This is \n title"
lblTitle?.text = "This is \n title"
I think you
title contains escaped character i.e the reason
\n is printing try once replacing
lblTitle?.text = cards.title.replacingOccurrences(of: "\\n", with: "\n")
Swifr 2.3 or lower
lblTitle?.text = cards.title.stringByReplacingOccurrencesOfString("\\n", withString: "\n")