use tag to combine @objc func methods

Question

My code declares 2 different @objc func methods using UIPan gestureRecongnizzer. I would think there would be a way to use just 1 objc func method using a tag. All the function currently does is move the imageview around. I dont know if tag is the best way and I am open to other solutions I just want 1 func. Specifically look at pgGestureMethod and sgGestureMethod.

   var pg = UIImageView()
var pgGesture = UIPanGestureRecognizer()
var pgCon = [NSLayoutConstraint]()

var sg = UIImageView()
var sgGesture = UIPanGestureRecognizer()
var sgCon = [NSLayoutConstraint]()

    override func viewDidLoad() {
    super.viewDidLoad()
  [pg,sg].forEach({
        $0.translatesAutoresizingMaskIntoConstraints = false
        self.view.addSubview($0)
        $0.isUserInteractionEnabled = true

    })
    pgGesture = UIPanGestureRecognizer(target: self, action: #selector(ViewController.pgGestureMethod(_:)))
    pg.addGestureRecognizer(pgGesture)


    sgGesture = UIPanGestureRecognizer(target: self, action: #selector(ViewController.sgGestureMethod(_:)))
    sg.addGestureRecognizer(sgGesture)

}

    @objc func pgGestureMethod(_ sender: UIPanGestureRecognizer){

    self.view.bringSubviewToFront(pg)
    let tranistioon = sender.translation(in: self.view)
    pg.center = CGPoint(x: pg.center.x + tranistioon.x, y: pg.center.y + tranistioon.y)
    sender.setTranslation(CGPoint.zero,in: self.view)


}
@objc func sgGestureMethod(_ sender: UIPanGestureRecognizer){

    let tranistioon = sender.translation(in: self.view)
    sg.center = CGPoint(x: sg.center.x + tranistioon.x, y: sg.center.y + tranistioon.y)
    sender.setTranslation(CGPoint.zero,in: self.view)


}

Answer 1

Gesture recognisers have a view property that refers to the view to which they are added, so you don't even need a tag!

Just use one single action method like this:

@objc func pgGestureMethod(_ sender: UIPanGestureRecognizer){
    // I replaced every "pg" with "sender.view!"
    self.view.bringSubviewToFront(sender.view!)
    let tranistioon = sender.translation(in: self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + tranistioon.x, y: sender.view!.center.y + tranistioon.y)
    sender.setTranslation(CGPoint.zero,in: self.view)
}

If not writing self.view.bringSubviewToFront(sg) is actually intentional, you can simply check sender.view!:

@objc func pgGestureMethod(_ sender: UIPanGestureRecognizer){
    if sender.view == pg {
        self.view.bringSubviewToFront(pg)
    }
    let tranistioon = sender.translation(in: self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + tranistioon.x, y: sender.view!.center.y + tranistioon.y)
    sender.setTranslation(CGPoint.zero,in: self.view)
}