相关疑难解决方法(0)

我正在尝试显示(AlertController)操作表.但是我在控制台中逐渐减弱了"<_UIPopoverBackgroundVisualEffectView 0x7fd65ef76ec0>被要求设置其不透明度的动画.这将导致效果出现故障,直到不透明度返回到1."

这是我的代码: -

extension GroupDataView {

  func callDot (sender : UIButton)
  {
      let alert = UIAlertController(title: nil, message: nil,
                                  preferredStyle: .actionSheet)

      alert.addAction(UIAlertAction(title: "Edit Group", style: .default , handler:{ (action)in
        print("User click Edit Group")
      }))

      alert.addAction(UIAlertAction(title: "Create Folder", style: .default , handler:{ (action)in
        print("User click Create Folder button")
      }))

      alert.addAction(UIAlertAction(title: "Delete Group", style: .destructive , handler:{ (action)in
          print("User click Delete Group button")

      }))

        if let popoverController = alert.popoverPresentationController   {
          popoverController.sourceView = sender
          popoverController.sourceRect = sender.bounds

          self.present(alert, animated: true, completion: { …