AVCamBarcode.CameraViewController.RegionOfInterestChanged C# (CSharp) Метод

		void RegionOfInterestChanged (object sender, EventArgs e)
		{
			var pv = (PreviewView)sender;
			CGRect newRegion = pv.RegionOfInterest;

			// Update the AVCaptureMetadataOutput with the new region of interest.
			sessionQueue.DispatchAsync (() => {
				// Translate the preview view's region of interest to the metadata output's coordinate system.
				metadataOutput.RectOfInterest = PreviewView.VideoPreviewLayer.MapToMetadataOutputCoordinates (newRegion);

				// Ensure we are not drawing old metadata object overlays.
				DispatchQueue.MainQueue.DispatchAsync (RemoveMetadataObjectOverlayLayers);
			});
		}