快速检测应用程序是在后台还是前台 [英] Detect if the application in background or foreground in swift
本文介绍了快速检测应用程序是在后台还是前台的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有什么办法可以知道我的应用程序是处于后台模式还是前台模式.谢谢
is there any way to know the state of my application if it is in background mode or in foreground . Thanks
推荐答案
[UIApplication sharedApplication].applicationState
将返回应用程序的当前状态,例如:
[UIApplication sharedApplication].applicationState
will return current state of applications such as:
- UIApplicationStateActive
- UIApplicationStateInactive
- UIApplicationStateBackground
或者如果您想通过通知访问,请参阅UIApplicationDidBecomeActiveNotification
or if you want to access via notification see UIApplicationDidBecomeActiveNotification
Swift 3+
let state = UIApplication.shared.applicationState
if state == .background || state == .inactive {
// background
} else if state == .active {
// foreground
}
switch UIApplication.shared.applicationState {
case .background, .inactive:
// background
case .active:
// foreground
default:
break
}
目标 C
UIApplicationState state = [[UIApplication sharedApplication] applicationState];
if (state == UIApplicationStateBackground || state == UIApplicationStateInactive) {
// background
} else if (state == UIApplicationStateActive) {
// foreground
}
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