protected override void OnNavigatedTo(NavigationEventArgs e) { this.ViewModel = (ViewModels.TodoItemViewModel)e.Parameter; Frame rootFrame = Window.Current.Content as Frame; Windows.UI.Core.SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = Windows.UI.Core.AppViewBackButtonVisibility.Visible; }
public static TodoItemViewModel GetInstance() { if (todoItemViewModel == null) { todoItemViewModel = new TodoItemViewModel(); } return(todoItemViewModel); }
/// <summary> /// 在应用程序由最终用户正常启动时进行调用。 /// 将在启动应用程序以打开特定文件等情况下使用。 /// </summary> /// <param name="e">有关启动请求和过程的详细信息。</param> protected override void OnLaunched(LaunchActivatedEventArgs e) { Frame rootFrame = Window.Current.Content as Frame; // 不要在窗口已包含内容时重复应用程序初始化, // 只需确保窗口处于活动状态 if (rootFrame == null) { // 创建要充当导航上下文的框架,并导航到第一页 rootFrame = new Frame(); rootFrame.NavigationFailed += OnNavigationFailed; if (e.PreviousExecutionState == ApplicationExecutionState.Terminated) { //TODO: 从之前挂起的应用程序加载状态 if (ApplicationData.Current.LocalSettings.Values.ContainsKey("NavigationState")) { rootFrame.SetNavigationState((string)ApplicationData.Current.LocalSettings.Values["NavigationState"]); } issuspend = false; } // 将框架放在当前窗口中 Window.Current.Content = rootFrame; } if (e.PrelaunchActivated == false) { if (rootFrame.Content == null) { // 当导航堆栈尚未还原时,导航到第一页, // 并通过将所需信息作为导航参数传入来配置 // 参数 ViewModels.TodoItemViewModel Vmv = new ViewModels.TodoItemViewModel(); rootFrame.Navigate(typeof(MainPage), e.Arguments); ApplicationView.GetForCurrentView().SetPreferredMinSize(new Size { Width = 320, Height = 480 }); } // 确保当前窗口处于活动状态 Window.Current.Activate(); } Windows.UI.Core.SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested; }