//MARK: UI
extension ChooseImageViewController{
    func showError(errorMessage : String){
        let alertController = UIAlertController(title: "Error", message: errorMessage, preferredStyle: .alert)
        let action = UIAlertAction(title: "dismiss", style: .default)
        alertController.addAction(action)
        self.present(alertController, animated: true, completion: nil)
    }

    func showResultScreen(image : UIImage,resultString : String){
        let vc = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "ResultViewController") as! ResultViewController
        vc.image = image
        vc.resultString = resultString
        self.navigationController?.pushViewController(vc, animated: true)
    }
}