我现在的快速代码使用func addBOx将一系列图像视图添加到uiviewcontroller屏幕。当用户双击单个图像视图时，它允许它更改其宽度。当一系列图像视图出现在屏幕上并且用户点击不透明度按钮时，只有并且只有当他们点击不透明度按钮时，才在触摸添加的iamgeview之后，然后添加以更改宽度的滑块将更改不透明度或选择的图像视图。我在下面添加了要尝试做的gif。

class ViewController: UIViewController {

var sx = UISlider()
var count: Int = 0
var ht = -90
var ww = 80
var arrTextFields = [UIImageView]()
var b7 = UIButton()
var b8 = UIButton()


var currentView: UIView?

override func viewDidLoad() {
    super.viewDidLoad()

    [b7,sx,b8].forEach {
        $0.translatesAutoresizingMaskintoConstraints = false
        view.addSubview($0)
        $0.backgroundColor = .systemOrange
    }

    b7.setTitle("add imageview",for: .normal)
    b8.setTitle("opacity",for: .normal)
    b7.frame = CGRect(x: view.center.x-115,y: view.center.y + 200,width: 70,height: 40)
    sx.frame = CGRect(x: view.center.x-115,y: view.center.y-200,height: 40)
    b8.frame = CGRect(x: view.center.x-115,y: view.center.y,height: 40)
    b7.addTarget(self,action: #selector(addBOx),for: .touchUpInside)
    b8.addTarget(self,action: #selector(op),for: .touchUpInside)
}
@objc func op() {
//uses slider to change the alpha after the imageview added is selected. 


}

@objc func addBOx() {


    let subview = UIImageView()


    subview.isUserInteractionEnabled = true
    arrTextFields.append(subview)
    view.addSubview(subview)



    sx.addTarget(self,action: #selector(ji),for: .valueChanged)
    sx.minimumValue = 10
    sx.maximumValue = 150

    subview.frame = CGRect(x: view.bounds.midX - 0,y: view.bounds.midY + CGFloat(ht),width: CGFloat(ww),height: 35)
    subview.backgroundColor = .purple
    subview.tag = count
    let pan = UIPanGestureRecognizer(target: self,action: #selector(handlePanGestured(_:)))


    subview.addGestureRecognizer(pan)

    count += 1
    ht += 50
    arrTextFields.append(subview)


    let tapGesture = UITapGestureRecognizer(target: self,action: #selector(handletapGestured(_:)))
    subview.addGestureRecognizer(tapGesture)
}

@objc func handletapGestured(_ gesture: UIPanGestureRecognizer) {
    currentView = gesture.view

}

@objc func handlePanGestured(_ gesture: UIPanGestureRecognizer) {


    let draggedView = gesture.view!
    view.bringSubviewToFront(draggedView)


    let translation = gesture.translation(in: view)
    draggedView.center = CGPoint(x: draggedView.center.x + translation.x,y: draggedView.center.y + translation.y)
    gesture.setTranslation(.zero,in: view)
}

@objc func ji(sender : UISlider){
    ww = Int(sx.value)


        currentView?.alpha = CGFloat(sx.value)


          currentView?.bounds.size.width = CGFloat(sx.value)



}

}