[UWP]应用失败并重新获得焦点的事件？ [英] [UWP]Event for when app loses and regains focus?

问题描述

我创建了一个winJS通用Windows 10应用程序。每当应用程序失去焦点时我想暂停视频，并在视频重新获得焦点时取消暂停。是否有我应该监听的事件？

I have created a winJS universal Windows 10 app. I would like to pause a video whenever the app loses focus and unpause when the video regains focus. Are there events that I should be listening for?

推荐答案

是的，您可以订阅Window.Current.Activated事件。我为C＃代码道歉，但你应该能够在WinJS中做同样的事情。

Yes, you can subscribe to the Window.Current.Activated event. I apologise for the C# code, but you should be able to do the same in WinJS.

Window.Current.Activated += Current_Activated;

然后，检测事件处理程序中的状态：

Then, detect the state in the event handler:

void Current_Activated(object sender, Windows.UI.Core.WindowActivatedEventArgs e)
        {
            if (e.WindowActivationState ==
                Windows.UI.Core.CoreWindowActivationState.Deactivated)
            {
                FocusStatus.Text = "Focus lost!";

            }
            else if (e.WindowActivationState ==
                Windows.UI.Core.CoreWindowActivationState.PointerActivated)
            {
                FocusStatus.Text = "App has focus from clicking";
            }
            else if (e.WindowActivationState == Windows.UI.Core.CoreWindowActivationState.CodeActivated)
            {
                FocusStatus.Text = "App has focus from the OS";
            }
        }

我刚刚写了一篇关于这个主题的博客文章，内容更详细，包括检测应用程序的时间是可见/不可见的：

I just wrote a blog post about this topic with more detail, including detecting when the app is visible/invisible:

http://grogansoft.com/blog/?p=1269

http://grogansoft.com/blog/?p=1269

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