UITextField in UIAlertController (border, backgroundColor)

Question

Here is a screenshot of a UIAlertController. I was just playing around custom fonts and textfield properties but I was unable to accomplish the fol

Answer 1

To address the situation as discussed in @Rory McKinnel and @Matthew where the superview are NULL and address modifying presented view:

extension UIAlertController {
    override open func viewWillAppear(_ animated: Bool) {
       super.viewWillAppear(animated)
       self.textFields?.forEach {
           $0.superview?.backgroundColor = .color
           $0.superview?.superview?.subviews[0].removeFromSuperview()
       }
    }
}