UIAlertController取消动作背景颜色

Question

My question is similar to this where I couldn't find the answer.

UIAlertController change background color of Cancel button for action sheet和这个alertController with white borders我希望取消按钮与actionStyle为“取消”，背景应该是不同的颜色（默认情况下它将是白色）。如何更改“取消”按钮的背景颜色。我不想将actionStyle更改为默认值。有没有其他方法来实现这一目标？这是我的代码

   func showActionSheet(_ changeAction: UIAlertAction) {
    let alertController = UIAlertController(title: "", message: "Are you sure".localize(), preferredStyle: .actionSheet)
    alertController.view.tintColor = UIColor.green
    if let subview = alertController.view.subviews.first, let alertContentView = subview.subviews.first {
        for innerView in alertContentView.subviews {
            innerView.backgroundColor = UIColor.red
        }
    }
    let cancelAction = UIAlertAction(title: "Cancel".localize(), style: .cancel) { _ in
        self.doneButton.isEnabled = true
    }
    alertController.addAction(changeAction)
    alertController.addAction(cancelAction)
    self.present(alertController, animated: true)
}