Application.LeavingBackground 事件

定义

命名空间:

Windows.UI.Xaml

当应用从后台移动到前台时发生。

public:
 virtual event LeavingBackgroundEventHandler ^ LeavingBackground;

// Register
event_token LeavingBackground(LeavingBackgroundEventHandler const& handler) const;

// Revoke with event_token
void LeavingBackground(event_token const* cookie) const;

// Revoke with event_revoker
Application::LeavingBackground_revoker LeavingBackground(auto_revoke_t, LeavingBackgroundEventHandler const& handler) const;

public event LeavingBackgroundEventHandler LeavingBackground;

function onLeavingBackground(eventArgs) { /* Your code */ }
application.addEventListener("leavingbackground", onLeavingBackground);
application.removeEventListener("leavingbackground", onLeavingBackground);
- or -
application.onleavingbackground = onLeavingBackground;

Public Custom Event LeavingBackground As LeavingBackgroundEventHandler 

事件类型

LeavingBackgroundEventHandler

Windows 要求

设备系列	Windows 10 Anniversary Edition (在 10.0.14393.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v3.0 中引入)

注解

LeavingBackground 事件在注册它的同一单元中运行。

另请参阅

• 处理线程和单元