Swift add constraint programmatically

Question

I add a UILabel (amountLabel) in UIViewController in storyboard editor. And then in swift file, viewDidLoad, I programatically create a

Answer 1

let nameLabel: UILabel = {

   let label = UILabel()
    label.translatesAutoresizingMaskIntoConstraints = false
    return label
}()

if you forgot setting this label.translatesAutoresizingMaskIntoConstraints = false or if you add subview after constraints this problem arises