/*
         * This method will be called once the view controller and its subviews have appeared on screen
         */
        public override void ViewDidAppear(bool animated)
        {
            base.ViewDidAppear(animated);

            /*
             * This is the place where we tell Anyline to start receiving and displaying images from the camera.
             * Success/error tells us if everything went fine.
             */
            _error   = null;
            _success = _anylineBarcodeView.StartScanningAndReturnError(out _error);

            if (!_success)
            {
                // Something went wrong. The error object contains the error description
                (Alert = new UIAlertView(@"Start Scanning Error", _error.DebugDescription, (IUIAlertViewDelegate)null, "OK", null)).Show();
            }
        }