let anyView = UIView()
      view.addSubview(anyView)

     anyView.translatesAutoresizingMaskIntoConstraints = false
     anyView.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
     anyView.heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true
     anyView.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
     anyView.centerYAnchor.constraint(equalTo: self.view.centerYAnchor).isActive = true