c# - 检查当前是否显示了 ContentPage

Question

有没有办法判断当前是否显示了 ContentPage？

我需要在 ContentPage 的事件处理程序中编写代码来检查页面当前是否显示并采取相应行动。

Answer 1

除了GBreen12的回答，你也可以这样做...

bool isShowingMyPage = Application.Current.MainPage is MyPage || (Application.Current.MainPage is NavigationPage navPage && navPage.CurrentPage is MyPage); //If you are using a MasterDetailPage or something else, then you would have to handle this differently

//I think the below will work for checking if any modals are showing over your page but you should definitely test it in different scenarios to make sure. I am not sure if the modal is immediately removed from ModalStack when it gets popped or not

isShowingMyPage = Application.Current.MainPage?.Navigation?.ModalStack?.LastOrDefault() == null;