iOS定位服务问题：设备锁屏一段时间后无法接收位置更新

设备信息 #

• 设备：iPhone Xs Max
• 系统：iOS 16.1 beta 4
• App后台模式：已勾选位置更新

CLLocationManager配置 #

• CLAuthorizationStatus：authorizedWhenInUse
• CLAccuracyAuthorization：fullAccuracy
• allowsBackgroundLocationUpdates：开启
• pausesLocationUpdatesAutomatically：关闭（POC中可切换开启）
• activityType（CLActivityType）：.otherNavigation（已尝试其他选项）
• desiredAccuracy（CLLocationAccuracy）：kCLLocationAccuracyNearestTenMeters（用于接收GPS更新而非基站数据）
• distanceFilter（CLLocationDistance）：kCLDistanceFilterNone(-1)或0

问题场景 #

设备解锁状态下，App无论前台或后台运行均正常，步行时定位精度可达5-15米；但设备锁屏放入口袋一段时间后，位置更新停止，关闭Wi-Fi后现象一致，截图显示速度、航向等数值异常；重新打开App后恢复接收更新，但horizontalAccuracy精度变差，仿佛未使用GPS。

已尝试操作与疑问 #

已尝试开启/关闭低电量模式，现象似乎无差异，但不确定是否为诱因。据了解低电量模式仅影响网络、后台任务等，不修改定位服务精度，特此求证。

配置代码示例 #

class LocationDataManager: NSObject, CLLocationManagerDelegate {
    private let locationManager: CLLocationManager = CLLocationManager()
    var activityType: CLActivityType = .automotiveNavigation {
        didSet {
            locationManager.activityType = activityType
        }
    }

    var desiredAccuracy: CLLocationAccuracy = kCLLocationAccuracyBestForNavigation {
        didSet {
            locationManager.desiredAccuracy = desiredAccuracy
        }
    }

    var pausesLocationUpdatesAutomatically: Bool = false {
        didSet {
           locationManager.pausesLocationUpdatesAutomatically = pausesLocationUpdatesAutomatically
        }
    }

    var distanceFilter: CLLocationDistance = kCLDistanceFilterNone {
        didSet {
            locationManager.distanceFilter = distanceFilter
        }
    }

    init() {
        super.init()

        locationManager.delegate = self
        locationManager.activityType = .automotiveNavigation // controlled by the Picker
        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation // controlled by the Picker
        locationManager.pausesLocationUpdatesAutomatically = false // controlled by the Toggle
        locationManager.distanceFilter = kCLDistanceFilterNone // controlled by the Picker
        locationManager.allowsBackgroundLocationUpdates = true
    }

    func start() {
        locationManager.requestWhenInUseAuthorization()
        locationManager.startUpdatingLocation()
    }

    func stop() {
        locationManager.stopUpdatingLocation()
    }

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print(error)
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        print(locations.last)
   }

   func locationManagerDidPauseLocationUpdates(_ manager: CLLocationManager) {
        print(#function)
   }

   func locationManagerDidResumeLocationUpdates(_ manager: CLLocationManager) {
        print(#function)
   }
}

内容的提问来源于stack exchange，提问作者alpennec