//MARK: UIImagePickerController's delegate
extension ChooseImageViewController : UIImagePickerControllerDelegate,UINavigationControllerDelegate{
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        if let image = info["UIImagePickerControllerOriginalImage"] as? UIImage {
            self.labelImage(image: image)
        }
        picker.dismiss(animated: true, completion: nil)
    }
}