Remove Previous ViewController in UINavigationController

remove-prev-vc.swift

fileprivate func removePreviousViewController() {
  guard let navigationController = self.navigationController else { return }

  let controllerToRemove = "ConfirmationViewController"
  var allControllers = navigationController.viewControllers

  for (index, controller) in allControllers.enumerated() {
      let name = String(describing: type(of: controller))
      if name == controllerToRemove {
          allControllers.remove(at: index)
          navigationController.viewControllers = allControllers
          break
      }
  }
}