有没有一种方法可以阻止我的页面在我每次浏览页面时仅闪烁而出？

Question

每当我从任何页面导航到地图页面时，地图页面都会闪烁起来，显示一点然后消失，然后带我回到开始的页面。

我最近解决了以前的导航视图问题，因为它根本无法导航。如您所见，我有两个不同的switch语句用于导航，这可能是问题所在，但在其他任何地方都不会发生。

主页C＃代码：

 public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private void NavView_Loaded(object sender, RoutedEventArgs e)
        {
           foreach (NavigationViewItemBase item in NavView.MenuItems)
            {
                if (item is NavigationViewItem && item.Tag.ToString() == "Home")
                {
                    NavView.SelectedItem = item;
                    break;
                }
            }
        }


        private void NavView_ItemInvoked(NavigationView sender, NavigationViewItemInvokedEventArgs args)
        {
            if (args.IsSettingsInvoked)
            {
                Frame.Navigate(typeof(SettingsPage));
            }
            else
            {
                switch (args.InvokedItem)
                {
                    case "Home":
                        Frame.Navigate(typeof(MainPage));
                        break;

                    case "Attractions":
                        Frame.Navigate(typeof(AttractionsPage));
                        break;

                    case "Places to Eat":
                        Frame.Navigate(typeof(PlacestoEatPage));
                        break;

                    case "Map":
                        Frame.Navigate(typeof(BlankPage1));
                        break;

                    case "Photos":
                        Frame.Navigate(typeof(Photos_Page));
                        break;

                    case "News":
                        Frame.Navigate(typeof(NewsFeedPage));
                        break;

                    case "Weather":
                        Frame.Navigate(typeof(WeatherPage));
                        break;


                }


            }
        }

        private void NavView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
        {
            if (args.IsSettingsSelected)
            {
                Frame.Navigate(typeof(SettingsPage));
            }
            else
            {
                NavigationViewItem item = args.SelectedItem as NavigationViewItem;
                switch (item.Tag)
                {
                    case "home":
                        Frame.Navigate(typeof(MainPage));
                        break;

                    case "attractions":
                        Frame.Navigate(typeof(AttractionsPage));
                        break;

                    case "placestoEat":
                        Frame.Navigate(typeof(PlacestoEatPage));
                        break;

                    case "map":
                        Frame.Navigate(typeof(BlankPage1));
                        break;

                    case "photos":
                        Frame.Navigate(typeof(Photos_Page));
                        break;

                    case "news":
                        Frame.Navigate(typeof(NewsFeedPage));
                        break;

                    case "weather":
                        Frame.Navigate(typeof(WeatherPage));
                        break;

                }
            }
        }

        private void Page_Loaded(object sender, RoutedEventArgs e)
        {

        }

    }
 }

这是MapPage C＃代码，仅包含导航视图代码（如果我需要把其余的代码放在地图上特定位置的标记的代码中，让我知道不同的地图样式）：

private void NavView_ItemInvoked(NavigationView sender, NavigationViewItemInvokedEventArgs args)
        {
            if (args.IsSettingsInvoked)
            {
                Frame.Navigate(typeof(SettingsPage));
            }
            else
            {
                switch (args.InvokedItem)
                {
                    case "Home":
                        Frame.Navigate(typeof(MainPage));
                        break;

                    case "Attractions":
                        Frame.Navigate(typeof(AttractionsPage));
                        break;

                    case "Places to Eat":
                        Frame.Navigate(typeof(PlacestoEatPage));
                        break;

                    case "Map":
                        Frame.Navigate(typeof(BlankPage1));
                        break;

                    case "Photos":
                        Frame.Navigate(typeof(Photos_Page));
                        break;

                    case "News":
                        Frame.Navigate(typeof(NewsFeedPage));
                        break;

                    case "Weather":
                        Frame.Navigate(typeof(WeatherPage));
                        break;
                }

            }
        }

        private void NavView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
        {
            if (args.IsSettingsSelected)
            {
                Frame.Navigate(typeof(SettingsPage));
            }
            else
            {
                NavigationViewItem item = args.SelectedItem as NavigationViewItem;
                switch (item.Tag)
                {
                    case "home":
                        Frame.Navigate(typeof(MainPage));
                        break;

                    case "attractions":
                        Frame.Navigate(typeof(AttractionsPage));
                        break;

                    case "placestoEat":
                        Frame.Navigate(typeof(PlacestoEatPage));
                        break;

                    case "map":
                        Frame.Navigate(typeof(BlankPage1));
                        break;

                    case "photos":
                        Frame.Navigate(typeof(Photos_Page));
                        break;

                    case "news":
                        Frame.Navigate(typeof(NewsFeedPage));
                        break;

                    case "weather":
                        Frame.Navigate(typeof(WeatherPage));
                        break;
                }
            }
        }

Answer 1

浏览完我的C＃代码后，我意识到我不小心从主页复制了该代码，该代码将主页设置为要访问的页面。我把它拿出来，它本身就解决了。

感谢您的帮助！