当应用程序处于后台时,在Swift 2.0 Xcode 7中显示警报消息 [英]Show alert message in Swift 2.0 Xcode 7 when the app is in background
当应用程序在后台运行时,以编程方式更改iPhone锁定屏幕 [英]Changing iphone lock screen programmatically when app is running in background