AVCamBarcode.CameraViewController.AddMetadataOverlayLayers C# (CSharp) Метод

		void AddMetadataOverlayLayers (IEnumerable<MetadataObjectLayer> layers)
		{
			// Add the metadata object overlays as sublayers of the video preview layer.
			// We disable actions to allow for fast drawing.
			CATransaction.Begin ();
			CATransaction.DisableActions = true;

			metadataObjectOverlayLayers.Clear ();
			foreach (var l in layers) {
				PreviewView.VideoPreviewLayer.AddSublayer (l);
				metadataObjectOverlayLayers.Add (l); // Save the new metadata object overlays.
			}

			CATransaction.Commit ();

			// Create a timer to destroy the metadata object overlays.
			removeMetadataObjectOverlayLayersTimer = NSTimer.CreateScheduledTimer (TimeSpan.FromSeconds (1), t => RemoveMetadataObjectOverlayLayers());
		}