How can I check whether an app is in the backgroun...

# compose-ios

[KimJason]

How can I check whether an app is in the background or foreground state on iOS? I've been using the following method with Android Compose. How should I do this on iOS?

val lifecycleOwner = LocalLifecycleOwner.current
    DisposableEffect(lifecycleOwner) {
        val lifecycle = lifecycleOwner.lifecycle
        val observer = LifecycleEventObserver { _, event ->
            when (event) {
                Lifecycle.Event.ON_PAUSE -> {
                    exoPlayer.playWhenReady = false
                }
                Lifecycle.Event.ON_RESUME -> {
                    exoPlayer.playWhenReady = true
                }
                Lifecycle.Event.ON_DESTROY -> {
                    exoPlayer.run {
                        stop()
                        release()
                    }
                }
                else -> {}
            }
        }
        lifecycle.addObserver(observer)
        onDispose {
            lifecycle.removeObserver(observer)
        }
    }

[Dima Avdeev]

I think this question is overall to Kotlin for iOS. You can ask the same in channels #ios or #kotlin-native

[Michael Paus]

In iOSApp.swift you can overwrite a few methods like this

func applicationDidBecomeActive(_ application: UIApplication) {
    ...
}

func applicationDidEnterBackground(_ application: UIApplication) {
    ...
}

and then call your Kotlin code from there.