IOS Swift3如何随机删除自定义UIView

Question

我正在 swift 3 中构建一个 iOS 应用程序，我正在创建动态 UIViews。我需要随机删除自定义视图。请帮助我，我被这个问题困扰了很长时间。 提前致谢

class ViewController: UIViewController { 

    var myView: subView! 
    var y : CGFloat! 
    @IBOutlet weak var addButton: UIButton!

    override func viewDidLoad() {
        y = 1
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    func cancelbutton(_ sender: UIButton) {
        myView.removeFromSuperview()
    }

    @IBAction func buttonAction(_ sender: Any) {
        y = y + 110
        myView = subView(frame: CGRect(x: 80, y: y, width: 300, height: 100))

        myView.backgroundColor = UIColor.green
        myView.actionButton.addTarget(self, action: (#selector(cancelbutton(_:))), for: UIControlEvents.touchUpInside)
        self.view.addSubview(myView)
    }
}

正如您在上图中看到的那样，当我单击关闭时，SubView(custome View) 会关闭，但是带有绿色的 MyView 不会消失并停留在那里。有人请帮忙.........

required init?(coder aDecoder: NSCoder)
   {
       super.init(coder: aDecoder)
       Bundle.main.loadNibNamed("subView",owner: self, options:nil)
       self.addSubview(self.views)
       Bundle.main.loadNibNamed("subView",owner: self, options:nil)
       self.addSubview(self.views)

   }
   override init(frame: CGRect)
   {
       super.init(frame: frame)
       Bundle.main.loadNibNamed("subView", owner: self, options: nil)
       views.frame = bounds
       self.addSubview(self.views)
   }

   @IBAction func buttonAction(_ sender: Any) {
       views.removeFromSuperview()

   }

Answer 1

您做错的事情是您添加了子视图的多个视图，而您选择的原因并未删除。请修改您的代码，如下所示。 我所做的是，每当您添加新的subView 时，您还将设置其标记值，当您选择视图以删除其标记值并在该标记值上放置if 语句。

class ViewController: UIViewController { 
    var myView: subView! 
    var y : CGFloat! 
    var tag : Int = 0 
    @IBOutlet weak var addButton: UIButton!

    override func viewDidLoad() {
        y = 1
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }
    func cancelbutton(_ sender: UIButton)
    {
                let selectViewTagValue : Int = sender.tag /// save the selected view tag value
                for object in self.view.subviews {

                if ((object is subView) && object.tag == selectViewTagValue)
                {
                    object.removeFromSuperview()
                }
            }
    }
    @IBAction func buttonAction(_ sender: Any) {
        y = y + 110
        myView = subView(frame: CGRect(x: 80, y: y, width: 300, height: 100))
        myView.tag = tag 
        myView.actionButton.tag = tag
        tag = tag + 1
        myView.backgroundColor = UIColor.green
        myView.actionButton.addTarget(self, action: (#selector(cancelbutton(_:))), for: UIControlEvents.touchUpInside)
        self.view.addSubview(myView)

    }

Answer 2

尝试像这样更改取消操作：

func cancelbutton(_ sender: UIButton)
{
    if let myView = sender.superview {
        myView.removeFromSuperview()
    }
}

只需删除按钮的容器视图，而不是全局 myView。

Answer 3

我设法修复了删除问题，但目前我无法重新定位海关视图的位置，如下图所示，请帮助我。