A UISegmentedControl has a new appearance in iOS 13 and existing code to alter the colors of the segmented control no longer work as they did.
Prior to
IOS 13 and Swift 5.0 (Xcode 11.0)Segment Control 100% Working
if #available(iOS 13.0, *) {
yoursegmentedControl.backgroundColor = UIColor.black
yoursegmentedControl.layer.borderColor = UIColor.white.cgColor
yoursegmentedControl.selectedSegmentTintColor = UIColor.white
yoursegmentedControl.layer.borderWidth = 1
let titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
yoursegmentedControl.setTitleTextAttributes(titleTextAttributes, for:.normal)
let titleTextAttributes1 = [NSAttributedString.Key.foregroundColor: UIColor.black]
yoursegmentedControl.setTitleTextAttributes(titleTextAttributes1, for:.selected)
} else {
// Fallback on earlier versions
}