Screenshot by programming turns black - Swift

Question

I am trying to share a screenshot from my game through UIUIActivityViewController. To do this, I am creating a screenshot programatically and passes it through the UIActivityViewController.

The ActivityViewController seems to work. However, the image is all black.

Here is my code, were do I miss?

UIGraphicsBeginImageContextWithOptions(view!.frame.size, false, 0.0)
view!.layer.render(in: UIGraphicsGetCurrentContext()!)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

let shareViewController = UIActivityViewController(activityItems: [image], applicationActivities: [])
MenuScene.parentView.present(shareViewController, animated: true, completion: nil)

The MenuScene.parentView is the GameViewController.

Answer 1

So I changed the code to the following, with great results.

            let bounds = UIScreen.main.bounds
            UIGraphicsBeginImageContextWithOptions(bounds.size, true, 0.0)
            yourUIViewController.view!.drawHierarchy(in: bounds, afterScreenUpdates: false)

            let img = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext()

            let activityViewController = UIActivityViewController(activityItems: [img!], applicationActivities: nil)

And of course, presenting the view.

yourUIViewController.present(activityViewController, animated: true, completion: nil)