Mobile UWP中如何控制后向堆栈深度导航
如何控制UWP中的后堆栈深度导航?如何控制后堆栈深度我希望我的后堆栈只有3页。实际上,我希望后堆栈深度始终小于4。这是我的app.xaml.csMobile UWP中如何控制后向堆栈深度导航,mobile,uwp,stack,back,depth,Mobile,Uwp,Stack,Back,Depth,如何控制UWP中的后堆栈深度导航?如何控制后堆栈深度我希望我的后堆栈只有3页。实际上,我希望后堆栈深度始终小于4。这是我的app.xaml.cs sealed partial class App : Application { /// <summary> /// Initializes the singleton application object. This is the first line of authored code /// executed
sealed partial class App : Application
{
/// <summary>
/// Initializes the singleton application object. This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
public App()
{
this.InitializeComponent();
this.Suspending += OnSuspending;
}
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used such as when the application is launched to open a specific file.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
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();
rootFrame.NavigationFailed += OnNavigationFailed;
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: Load state from previously suspended application
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
rootFrame.CanGoBack ?
AppViewBackButtonVisibility.Visible :
AppViewBackButtonVisibility.Collapsed;
}
if (e.PrelaunchActivated == false)
{
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
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
// Ensure the current window is active
Window.Current.Activate();
}
}
/// <summary>
/// Invoked when Navigation to a certain page fails
/// </summary>
/// <param name="sender">The Frame which failed navigation</param>
/// <param name="e">Details about the navigation failure</param>
void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
{
throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
}
/// <summary>
/// Invoked when application execution is being suspended. Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
/// <param name="sender">The source of the suspend request.</param>
/// <param name="e">Details about the suspend request.</param>
private void OnSuspending(object sender, SuspendingEventArgs e)
{
var deferral = e.SuspendingOperation.GetDeferral();
//TODO: Save application state and stop any background activity
//save();
deferral.Complete();
}
private void OnBackRequested(object sender, Windows.UI.Core.BackRequestedEventArgs e)
{
Frame rootFrame = Window.Current.Content as Frame;
if (rootFrame.CanGoBack)
{
e.Handled = true;
rootFrame.GoBack();
}
}
密封部分类应用程序:应用程序
{
///
///初始化singleton应用程序对象。这是编写代码的第一行
///已执行,因此是main()或WinMain()的逻辑等价物。
///
公共应用程序()
{
this.InitializeComponent();
这个.Suspending+=OnSuspending;
}
///
///当最终用户正常启动应用程序时调用。其他入口点
///将在启动应用程序以打开特定文件时使用。
///
///有关启动请求和过程的详细信息。
仅启动受保护的覆盖无效(启动ActivatedEventArgs e)
{
Frame rootFrame=Window.Current.Content作为Frame;
//当窗口已经有内容时,不要重复应用程序初始化,
//只需确保窗口处于活动状态
if(rootFrame==null)
{
//创建一个框架作为导航上下文并导航到第一页
rootFrame=新框架();
rootFrame.NavigationFailed+=OnNavigationFailed;
如果(例如,PreviousExecutionState==ApplicationExecutionState.Terminated)
{
//TODO:从先前挂起的应用程序加载状态
}
//将框架放置在当前窗口中
Window.Current.Content=rootFrame;
SystemNavigationManager.GetForCurrentView().BackRequested+=OnBackRequested;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility=
根框,坎戈巴克?
AppViewBackButtonVisibility。可见:
AppViewBackButtonVisibility.已折叠;
}
如果(如预启动激活==错误)
{
if(rootFrame.Content==null)
{
//导航堆栈未还原时,请导航到第一页,
//通过将所需信息作为导航传递来配置新页面
//参数
导航(typeof(MainPage),例如参数);
}
//确保当前窗口处于活动状态
Window.Current.Activate();
}
}
///
///当导航到某个页面失败时调用
///
///导航失败的帧
///有关导航失败的详细信息
void OnNavigationFailed(对象发送方,NavigationFailedEventArgs e)
{
抛出新异常(“加载页面失败”+e.SourcePageType.FullName);
}
///
///在挂起应用程序执行时调用。应用程序状态已保存
///不知道应用程序是否会随内容一起终止或恢复
///记忆仍然完好无损。
///
///挂起请求的源。
///有关暂停请求的详细信息。
暂停时的私有void(对象发送方,SuspendingEventArgs e)
{
var deleral=e.SuspendingOperation.getdeleral();
//TODO:保存应用程序状态并停止任何后台活动
//save();
延迟。完成();
}
OnBackRequested私有无效(对象发送方,Windows.UI.Core.BackRequestedEventArgs e)
{
Frame rootFrame=Window.Current.Content作为Frame;
if(根框架.CanGoBack)
{
e、 已处理=正确;
rootFrame.GoBack();
}
}
您可以在主页上堆叠,导航到主页并在其中写入代码。但我不知道您的代码,但如果您能阅读,我会用中文编写。您需要编辑您的问题,并在问题中包含代码,而不是在单独的答案中。