UIApplicationState

The running states of an app  app的运行状态

Declaration

SWIFT

enumUIApplicationState : Int { case Active case Inactive case Background}

OBJECTIVE-C

typedefenum : NSInteger { UIApplicationStateActive,UIApplicationStateInactive,UIApplicationStateBackground } UIApplicationState;

Constants

• UIApplicationStateActive

  The app is running in the foreground and currently receiving events.

  APP在前台运行并可以接收到事件

  
  

• UIApplicationStateInactive

  The app is running in the foreground but is not receiving events. This might happen as a result of an interruption or because the app is transitioning to or from the background.

  APP在前台运行但是不能接收到事件。这可能是由中断导致的，或是因为APP正在过渡或者形成背景

• UIApplicationStateBackground

  The app is running in the background.

  APP正在后台运行