问题
How can you tell when a windows 8 Metro app gets put in the background? The suspended state doesn't activate. I have a break point on. It only hits if I close the app.
I am using a webcam and since no apps can run in the background I need to save my work when it's put in the background.
The windows phone it was application deactivated.
any help would be nice.
回答1:
Apps do not normally get suspended when in the debugger. However, you can force a suspend when debugging by:
- Enabling the Debug Location toolbar (red arrow in image below).
- Then press the Suspend button (blue arrow).
回答2:
The suspending event should fire when the application is no longer active, namely, when another application is brought to the front. Presuming you're using C#/XAML, the app.xaml.cs file already has the Suspending event wired up. In HTML5/JavaScript it's checkpoint and you'll see it in default.js.
来源：https://stackoverflow.com/questions/14076188/windows-8-winrt-application-goes-to-background-or-close