Touches command is not working due to scroll view - swift

Question

Hi I am new to swift programming. I wanted to created an app that can allow user to draw on an image and the drawing feature works however when I added scrollview it seems to be blocking the touch command that is suppose to be meant for the imageView is there any thing I can do to allow the user to draw on the image and keep the scrollView? the scrollView is there so that the user can zoom in and out of the image
let strokeColor:UIColor = UIColor.red
let lineWidth:CGFloat = 1.0
var path = UIBezierPath()
var shapeLayer = CAShapeLayer()
var croppedImage = UIImage()
#IBOutlet weak var scrollView: UIScrollView!
#IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageView.image = img
self.scrollView.minimumZoomScale = 1.0
self.scrollView.maximumZoomScale = 6.0
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return self.imageView
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first as UITouch?{
let touchPoint = touch.location(in: self.imageView)
path.move(to: touchPoint)
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first as UITouch?{
let touchPoint = touch.location(in: self.imageView)
path.addLine(to: touchPoint)
addNewPathToImage()
}
}
override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first as UITouch?{
let touchPoint = touch.location(in: self.imageView)
path.close()
}
}
func addNewPathToImage(){
shapeLayer.path = path.cgPath
shapeLayer.strokeColor = strokeColor.cgColor
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.lineWidth = lineWidth
imageView.layer.addSublayer(shapeLayer)
}