MonoTouch：UpPopoverController.DidDismiss未触发

Question

我有 UIPopoverController ，其中 DidDismiss 已连线：

           popYear.PresentFromBarButtonItem(btnYear,UIPopoverArrowDirection.Any,true);

           popYear.DidDismiss += (sender, args) => {
              Console.WriteLine("Bye bye");
           };

DidDismiss 会在用户点击popover 之外的关闭弹出窗口时触发。

但是，当弹出窗口关闭来自视图控制器时， DidDismiss 不会触发：

        tbhCLose.Tapped+= () => {
           if(PopOver!=null)
             PopOver.Dismiss(false); //Won't cause DidDismiss to fire
        };

Answer 1

调用popover.Dismiss时，DidDismiss不会触发。

更好的选择是收听viewconvtroller的ViewDisappearing并在那里进行更新“

           var uc = new YearViewController(SelectedYear);
           uc.ViewDisappearing+= (sender, e) => {
              this.SelectedYear = uc.SelectedYear;
              Update();
           };
           popYear = new UIPopoverController(uc);
           uc.PopOver = popYear;
           popYear.PresentFromBarButtonItem(btnYear,UIPopoverArrowDirection.Any,true);