Snippet for clearSubLayers within the ARSupportAudienceViewController

clearSubLayers+Snippet.swift

func clearSubLayers() {
    DispatchQueue.main.async {
        // loop through layers drawn from touches and remove them from the view
        guard let sublayers = self.drawingView.layer.sublayers else { return }
        for layer in sublayers {
            layer.isHidden = true
            layer.removeFromSuperlayer()
        }
    }
}