C# Controls.Frame类代码示例

        protected override async void OnLaunched(LaunchActivatedEventArgs args)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active

            if (rootFrame == null)
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();
                //Associate the frame with a SuspensionManager key                                
                SuspensionManager.RegisterFrame(rootFrame, "AppFrame");

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }
            if (rootFrame.Content == null)
            {
                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation
                // parameter
                if (!rootFrame.Navigate(typeof(EventsPage), "AllGroups"))
                {
                    throw new Exception("Failed to create initial page");
                }
            }
            // Ensure the current window is active
            Window.Current.Activate();            
        }

        /// <summary>
        /// アプリケーションがエンド ユーザーによって正常に起動されたときに呼び出されます。他のエントリ ポイントは、
        /// アプリケーションが特定のファイルを開くために呼び出されたときに
        /// 検索結果やその他の情報を表示するために使用されます。
        /// </summary>
        /// <param name="args">起動要求とプロセスの詳細を表示します。</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            // ウィンドウに既にコンテンツが表示されている場合は、アプリケーションの初期化を繰り返さずに、
            // ウィンドウがアクティブであることだけを確認してください
            if (rootFrame == null)
            {
                // ナビゲーション コンテキストとして動作するフレームを作成し、最初のページに移動します
                rootFrame = new Frame();

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: 以前中断したアプリケーションから状態を読み込みます。
                }

                // フレームを現在のウィンドウに配置します
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // ナビゲーション スタックが復元されていない場合、最初のページに移動します。
                // このとき、必要な情報をナビゲーション パラメーターとして渡して、新しいページを
                // 構成します
                if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }
            // 現在のウィンドウがアクティブであることを確認します
            Window.Current.Activate();
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="args">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            // Do not repeat app initialization when already running, just ensure that
            // the window is active
            if (args.PreviousExecutionState == ApplicationExecutionState.Running)
            {
                Window.Current.Activate();
                return;
            }

            if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
            {
                //TODO: Load state from previously suspended application
            }

            // Create a Frame to act navigation context and navigate to the first page
            var rootFrame = new Frame();
            if (!rootFrame.Navigate(typeof(MainPage)))
            {
                throw new Exception("Failed to create initial page");
            }

            // Place the frame in the current Window and ensure that it is active
            Window.Current.Content = rootFrame;
            Window.Current.Activate();
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="e">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
#if DEBUG
            if (System.Diagnostics.Debugger.IsAttached)
            {
                this.DebugSettings.EnableFrameRateCounter = true;
            }
#endif

            Frame rootFrame = Window.Current.Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active
            if (rootFrame == null)
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();

                // TODO: change this value to a cache size that is appropriate for your application
                rootFrame.CacheSize = 1;

                // Set the default language
                rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];
                Xamarin.Forms.Forms.Init(e);
                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    // TODO: Load state from previously suspended application
                }

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // Removes the turnstile navigation for startup.
                if (rootFrame.ContentTransitions != null)
                {
                    this.transitions = new TransitionCollection();
                    foreach (var c in rootFrame.ContentTransitions)
                    {
                        this.transitions.Add(c);
                    }
                }

                rootFrame.ContentTransitions = null;
                rootFrame.Navigated += this.RootFrame_FirstNavigated;

                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation
                // parameter
                if (!rootFrame.Navigate(typeof(MainPage), e.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }

            // Ensure the current window is active
            Window.Current.Activate();
        }

        public ExtendedSplash(SplashScreen splashscreen, bool loadState)
        {
            InitializeComponent();

            // Listen for window resize events to reposition the extended _splash screen image accordingly.
            // This is important to ensure that the extended _splash screen is formatted properly in response to snapping, unsnapping, rotation, etc...
            Window.Current.SizeChanged += new WindowSizeChangedEventHandler(ExtendedSplash_OnResize);

            _splash = splashscreen;

            if (_splash != null)
            {
                // Register an event handler to be executed when the _splash screen has been Dismissed.
                _splash.Dismissed += DismissedEventHandler;

                // Retrieve the window coordinates of the _splash screen image.
                SplashImageRect = _splash.ImageLocation;
                PositionImage();

                // Optional: Add a progress ring to your _splash screen to show users that content is loading
                PositionRing();
            }

            // Create a Frame to act as the navigation context
            RootFrame = new Frame();

            // Restore the saved session state if necessary
            Task.Run(async () => await RestoreStateAsync(loadState));
        }

        protected override async void OnLaunched(LaunchActivatedEventArgs args)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            if (rootFrame == null)
            {
                rootFrame = new Frame();          
                SuspensionManager.RegisterFrame(rootFrame, "AppFrame");

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    try
                    {
                        await SuspensionManager.RestoreAsync();
                    }
                    catch (SuspensionManagerException)
                    {
                        //Something went wrong restoring state.
                        //Assume there is no state and continue
                    }
                }

                Window.Current.Content = rootFrame;
            }
            if (rootFrame.Content == null)
            {
                if (!rootFrame.Navigate(typeof(GroupedItemsPage), "AllGroups"))
                {
                    throw new Exception("Failed to create initial page");
                }
            }
            Window.Current.Activate();

            this.InitSettings();
        }

 public MascotaPage()
 {
     this.InitializeComponent();
     rootFrame = Window.Current.Content as Frame;
     SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
     SystemNavigationManager.GetForCurrentView().BackRequested += MascotaPage_BackRequested;
 }

        /// <summary>
        /// Wird aufgerufen, wenn die Anwendung durch den Endbenutzer normal gestartet wird. Weitere Einstiegspunkte
        /// werden verwendet, wenn die Anwendung zum Öffnen einer bestimmten Datei, zum Anzeigen
        /// von Suchergebnissen usw. gestartet wird.
        /// </summary>
        /// <param name="e">Details über Startanforderung und -prozess.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
#if DEBUG
            if (System.Diagnostics.Debugger.IsAttached)
            {
                this.DebugSettings.EnableFrameRateCounter = true;
            }
#endif

            Frame rootFrame = Window.Current.Content as Frame;

            // App-Initialisierung nicht wiederholen, wenn das Fenster bereits Inhalte enthält.
            // Nur sicherstellen, dass das Fenster aktiv ist.
            if (rootFrame == null)
            {
                // Frame erstellen, der als Navigationskontext fungiert und zum Parameter der ersten Seite navigieren
                rootFrame = new Frame();

                // TODO: diesen Wert auf eine Cachegröße ändern, die für Ihre Anwendung geeignet ist
                rootFrame.CacheSize = 1;

                // Standardsprache festlegen
                rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];

                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    // TODO: Zustand von zuvor angehaltener Anwendung laden
                }

                // Den Frame im aktuellen Fenster platzieren
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // Entfernt die Drehkreuznavigation für den Start.
                if (rootFrame.ContentTransitions != null)
                {
                    this.transitions = new TransitionCollection();
                    foreach (var c in rootFrame.ContentTransitions)
                    {
                        this.transitions.Add(c);
                    }
                }

                rootFrame.ContentTransitions = null;
                rootFrame.Navigated += this.RootFrame_FirstNavigated;

                // Wenn der Navigationsstapel nicht wiederhergestellt wird, zur ersten Seite navigieren
                // und die neue Seite konfigurieren, indem die erforderlichen Informationen als Navigationsparameter
                // übergeben werden
                if (!rootFrame.Navigate(typeof(MainPage), e.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }

            // Sicherstellen, dass das aktuelle Fenster aktiv ist
            Window.Current.Activate();
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="args">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            // TODO: Create a data model appropriate for your problem domain to replace the sample data
            var sampleData = new SampleDataSource();

            if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
            {
                //TODO: Load state from previously suspended application
            }

            // Create a Frame to act navigation context and navigate to the first page,
            // configuring the new page by passing required information as a navigation
            // parameter
            var rootFrame = new Frame();
            rootFrame.Navigate(typeof(Dashboard), sampleData);

            // Place the frame in the current Window and ensure that it is active
            Window.Current.Content = rootFrame;
            Window.Current.Activate();

            // move to an appropriate place
            var liveTiles = new LiveTiles();
            liveTiles.ShowAsLiveTile("Wash the car");
            liveTiles.ShowAsLiveTile("Do the dishes");
            liveTiles.ShowAsLiveTile("Show the app");
            liveTiles.ShowAsLiveTile("Mow the lawn");
            liveTiles.ShowAsBadge(6);
            liveTiles.ShowAsToast("Woot, a toast!");
        }

        /// <summary>
        /// Se invoca cuando la aplicación la inicia normalmente el usuario final. Se usarán otros puntos
        /// de entrada cuando la aplicación se inicie para abrir un archivo específico, para mostrar
        /// resultados de la búsqueda, etc.
        /// </summary>
        /// <param name="e">Información detallada acerca de la solicitud y el proceso de inicio.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
            #if DEBUG
            if (System.Diagnostics.Debugger.IsAttached)
            {
                this.DebugSettings.EnableFrameRateCounter = true;
            }
            #endif

            Frame rootFrame = Window.Current.Content as Frame;

            // No repetir la inicialización de la aplicación si la ventana tiene contenido todavía,
            // solo asegurarse de que la ventana está activa.
            if (rootFrame == null)
            {
                // Crear un marco para que actúe como contexto de navegación y navegar a la primera página.
                rootFrame = new Frame();

                // TODO: Cambiar este valor a un tamaño de caché adecuado para la aplicación
                rootFrame.CacheSize = 1;

                // Establecer el idioma predeterminado
                rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];

                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    // TODO: Cargar el estado de la aplicación suspendida previamente
                }

                // Poner el marco en la ventana actual.
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // Quita la navegación de transición en el inicio.
                if (rootFrame.ContentTransitions != null)
                {
                    this.transitions = new TransitionCollection();
                    foreach (var c in rootFrame.ContentTransitions)
                    {
                        this.transitions.Add(c);
                    }
                }

                rootFrame.ContentTransitions = null;
                rootFrame.Navigated += this.RootFrame_FirstNavigated;

                // Cuando no se restaura la pila de navegación, navegar a la primera página,
                // configurando la nueva página pasándole la información requerida como
                //parámetro de navegación
                if (!rootFrame.Navigate(typeof(MainPage), e.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }

            // Asegurarse de que la ventana actual está activa.
            Window.Current.Activate();
        }

        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            var rootFrame = Window.Current.Content as Frame;

            if (rootFrame == null)
            {
                rootFrame = new Frame();

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                }

                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }

            if (args.Arguments != string.Empty)
            {
                LoadFromPinned(args.Arguments);
            }

            Window.Current.Activate();
        }

   //     private Windows.UI.Core.CoreDispatcher _dispatcher;

  /*      internal async Task ensureOnUIThread2(Action t)
        {
            if (_thread_id != Environment.CurrentManagedThreadId)
                await _dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => t.Invoke());
            else
            {
                t.Invoke();
            }
        } */

        internal Task<NKE_Window> createWindow(Dictionary<string, object> options)
        {

            var tcs = new TaskCompletionSource<NKE_Window>();

         //    _dispatcher = Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher;


            Frame rootFrame = Window.Current.Content as Frame;
            if (rootFrame == null)
            {
                rootFrame = new Frame();
                rootFrame.NavigationFailed += OnNavigationFailed;
                Window.Current.Content = rootFrame;
            }

            globalEvents.once<NKE_Window>("NKE.WindowCreated." + this._id, (e, window) =>
            {
                //     this._window = window;
                tcs.TrySetResult(window);
            });

            if (rootFrame.Content == null)
            {
                rootFrame.Navigate(typeof(NKE_Window), this._id);
            }
            NKEventEmitter.global.emit<string>("NKE.WindowAdded", _id.ToString(), false);

            rootFrame.Unloaded += RootFrame_Unloaded;
            Window.Current.Activate();


            return tcs.Task;
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user. 
        /// </summary>
        /// <param name="args">A <see cref="LaunchActivatedEventArgs"/> containing details about the launch request and 
        /// the process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            var rootFrame = Window.Current.Content as Frame;
            if (rootFrame == null)
            {
                rootFrame = new Frame();

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: Load state from previously suspended application
                }

                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }

            Window.Current.Activate();
        }

        /// <summary>
        /// Occurs when the application is launched.
        /// </summary>
        /// <param name="args"></param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            base.OnLaunched(args);

            var frame = Window.Current.Content as Frame;

            if (frame == null) {
                frame = new Frame();

                frame.Navigated += OnFrameNavigated;
                frame.NavigationFailed += OnFrameNavigationFailed;

                Window.Current.Content = frame;

                // listen for backbutton requests
                SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested;
                UpdateBackButtonVisibility();
            }

            if (frame.Content == null) {
                // navigate to the master page providing the navigation structure
                frame.Navigate(typeof(MasterNavigationPage), this.NavigationStructure);
            }
            Window.Current.Activate();
        }

        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            if (rootFrame == null)
            {
                rootFrame = new Frame();

                rootFrame.NavigationFailed += OnNavigationFailed;

                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: Load state from previously suspended application
                }

                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                rootFrame.Navigate(typeof(MainPage), e.Arguments);
            }

            Window.Current.Activate();
        }