AVCamBarcode.CameraViewController.RunningChanged C# (CSharp) Метод

		void RunningChanged (NSObservedChange obj)
		{
			var isSessionRunning = ((NSNumber)obj.NewValue).BoolValue;

			DispatchQueue.MainQueue.DispatchAsync (() => {
				MetadataObjectTypesButton.Enabled = isSessionRunning;
				SessionPresetsButton.Enabled = isSessionRunning;
				CameraButton.Enabled = isSessionRunning && AVCaptureDevice.DevicesWithMediaType (AVMediaType.Video).Length > 1;
				ZoomSlider.Enabled = isSessionRunning;
				ZoomSlider.MaxValue = (float)NMath.Min (videoDeviceInput.Device.ActiveFormat.VideoMaxZoomFactor, 8);
				ZoomSlider.Value = (float)(videoDeviceInput.Device.VideoZoomFactor);

				// After the session stop running, remove the metadata object overlays,
				// if any, so that if the view appears again, the previously displayed
				// metadata object overlays are removed.
				if (!isSessionRunning)
					RemoveMetadataObjectOverlayLayers ();
			});
		}