如何在swift4的uiImageView中获取图像的坐标

我正在应用程序中用相机拍照。我想知道图像在swift4屏幕上的精确位置,我该怎么做。 有两张图片,一张在纵向视图中,另一张在横向视图中。

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let image = info[UIImagePickerControllerOriginalImage] as! UIImage
    imageView.contentMode = .scaleAspectFit
    imageView.image = image
    self.view.backgroundColor = UIColor.black
    picker.dismiss(animated: true, completion: nil)
}