handlePan

handlePan

@objc func handlePan(_ sender: UIPanGestureRecognizer) {
    let targetView = sender.view!
    let translation = sender.translation(in: view)

    switch sender.state {
    case .began,.changed, .ended:
        targetView.center = CGPoint(x: targetView.center.x + translation.x
            ,y: targetView.center.y + translation.y)
        sender.setTranslation(CGPoint.zero, in: view)

        break
    default:
        break
    }
}