UIGraphicsBeginImageContext(drawingViewController.imageView.frame.size);
drawingViewController.imageView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *finishedPic = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(self, @selector(exitProg:didFinishSavingWithError:contextInfo:), nil);