ios - 启用后禁用 allowsBackgroundLocationUpdates (CLLocationManager) 不起作用

Question

我的应用程序与持续的后台位置更新一起工作。当然它有所有的权限和其他东西，比如

allowsBackgroundLocationUpdates = true

最初我想在后台使用 NSProcessInfoPowerStateDidChange 通知响应 LowPowerMode 更改。并在不调用 stopUpdatingLocation 的情况下禁用 allowsBackgroundLocationUpdates 停止更新位置。

但是收到通知和设置后才发现

allowsBackgroundLocationUpdates = false

在后台应用程序正在运行。

所以我走得更远，确定了 disabling allowsBackgroundLocationUpdates 甚至 in foreground 在它最初设置为 true 根本不起作用。应用程序继续在后台运行。

Apple 关于此事的文档

you use this property to enable and disable the behavior based on your app’s behavior

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来自 CLLocationManager 类，allowsBackgroundLocationUpdates 属性的描述

With UIBackgroundModes set to include "location" in Info.plist, you must also set this property to YES at runtime whenever calling -startUpdatingLocation with the intent to continue in the background. Resetting this property to NO is equivalent to omitting "location" from the UIBackgroundModes value.

Simple project在 GitHub 上显示了我提到的行为。

那么问题来了，这是属性(property)的故意行为吗？

Answer 1

When the value of this property is false, apps receive location updates normally while running in either the foreground or background based on its current authorization. Updates stop only when the app is suspended, thereby preventing the app from being woken up to handle those events.Apple API Discussion.

我认为属性(property)讨论可以解决你的问题。