在 Windows Phone 8.1 XAML 中检测停用和应用程序关闭 [英] Detecting deactivation and app close in Windows Phone 8.1 XAML

问题描述

出于安全原因，我需要在用户退出应用程序时将其注销，并在他们返回时显示登录屏幕.

For security reasons, I need to log out the users when they exit the app and show login screen when they return back.

在 Windows Phone 8 和 Windows Phone 8.1 Silverlight 中，App 类中有 Application_Deactivated 和 Application_Closing 方法(或在 Caliburn.Micro 中重写的方法 OnClose、OnDeactivate).

In Windows Phone 8 and Windows Phone 8.1 Silverlight there are Application_Deactivated and Application_Closing methods on the App class (or methods OnClose, OnDeactivate to override in Caliburn.Micro).

唯一有趣的事件似乎是 Suspend 和 Resume，但是当我使用开始"按钮退出应用程序并使用后退"按钮返回时它们不会被调用，或者从列表中启动应用程序.

The only interesting events seems to be Suspend and Resume, but they do not called when I exit the app using the Start button and get back using the Back button or launching the app from the list.

Windows Phone 8.1 XAML 有哪些替代方案?

(设置 ActivationPolicy="Replace" 可以解决一半的问题，但我想这是不可能的，因为 WMAppManifest.xml 不是 Windows Phone 8.1 XAML 项目的一部分).

(Setting ActivationPolicy="Replace" would solve half of the problem but I guess this is not possible, when WMAppManifest.xml is not event a part of a Windows Phone 8.1 XAML project).

推荐答案

Suspending 事件将在您离开应用程序后立即调用，但不会在调试模式下调用.我已经构建了一个简单应用修改LocalSettings后暂停 事件，然后在恢复时获取信息.

The Suspending event will be called just after you navigate away from the app, but not in debug mode. I've build a simple app modyfing LocalSettings upon Suspending event and then acquiring information when Resuming.

您可能知道，但为了答案的完整性 - 一些评论:

You are probably aware, but for the sake of completeness of the answer - some remarks:

• 在 Suspending 事件之前，OnNavigatedFrom 事件正在被调用，但是当您 Resume 时，OnNavigatedToem> 被 不 称为 - 参考:

• before Suspending event, the OnNavigatedFrom event is being called, but when you Resume, the OnNavigatedTo is not called - reference:

注意在 Windows Phone 上，当应用程序暂停时调用 OnNavigatedFrom().应用恢复时不会调用 OnNavigatedTo().

Note On Windows Phone, OnNavigatedFrom() is called when the app is suspended. OnNavigatedTo() is not called when the app is resumed.

要使用调试器测试暂停/恢复，请在调试位置选项卡中使用生命周期事件 - 更多信息

to test Suspending/Resuming with debugger, use Lifecycle events in Debug location tab - more info

参考 Windows 中的应用程序生命周期运行时应用

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