swift - HKWorkoutRouteBuilder 和 CLLocationManager 仅以增量方式添加路线更新

Question

我在 watchOS 上有一个功能锻炼应用程序，用于跟踪室内和室外运行情况。我正在尝试使用 HKWorkoutRouteBuilder 将户外运行路线添加到 HealthKit。实际户外运行期间的实际测试仅显示 map 上的部分路线更新，如下面的一小部分蓝点所示；

路由更新来自我在以下类(class)中设置的 CoreLocation。

class LocationManager: NSObject, CLLocationManagerDelegate {

    public var globalLocationManager: CLLocationManager?
    private var routeBuilder: HKWorkoutRouteBuilder?

    public func setUpLocationManager() {
        globalLocationManager = CLLocationManager()
        globalLocationManager?.delegate = self
        globalLocationManager?.desiredAccuracy = kCLLocationAccuracyBest
        // Update every 13.5 meters in order to acheive updates no faster than once every 3sec.
        // This assumes runner is running at no faster than 6min/mile - 3.7min/km
        globalLocationManager?.distanceFilter = 13.5
        // Can use `kCLDistanceFilterNone` 👆 which will give more updates but still only at wide intervals.

        globalLocationManager?.activityType = .fitness
        /*
        from the docs
        ...if your app needs to receive location events while in the background,
        it must include the UIBackgroundModes key (with the location value) in its Info.plist file.
        */

        routeBuilder = HKWorkoutRouteBuilder(healthStore: healthStore, device: .local())

        globalLocationManager?.startUpdatingLocation()
        globalLocationManager?.allowsBackgroundLocationUpdates = true
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        // Filter the raw data, excluding anything greater than 50m accuracy
        let filteredLocations = locations.filter { isAccurateTo -> Bool in
            isAccurateTo.horizontalAccuracy <= 50
        }

        guard !filteredLocations.isEmpty else { return }

        routeBuilder?.insertRouteData(filteredLocations, completion: { success, error in
            if error != nil {
                // throw alert due to error in saving route.
                print("Error in \(#function) \(error?.localizedDescription ?? "Error in Route Builder")")
            }
        })
    }

    // Called in class WorkoutController when workout session ends.
    public func addRoute(to workout: HKWorkout) {
        routeBuilder?.finishRoute(with: workout, metadata: nil, completion: { workoutRoute, error in
            if workoutRoute == nil {
                fatalError("error saving workout route")
            }
        })
    }

}

然后使用 HKAnchoredObjectQuery 将该路线添加到 SwiftUI map 中。与以下;

public func getRouteFrom(workout: HKWorkout) {
        let mapDisplayAreaPadding = 1.3

        let runningObjectQuery = HKQuery.predicateForObjects(from: workout)

        let routeQuery = HKAnchoredObjectQuery(type: HKSeriesType.workoutRoute(), predicate: runningObjectQuery, anchor: nil, limit: HKObjectQueryNoLimit) { (query, samples, deletedObjects, anchor, error) in

            guard error == nil else {
                fatalError("The initial query failed.")
            }
            // Make sure you have some route samples
            guard samples!.count > 0 else {
                return
            }
            let route = samples?.first as! HKWorkoutRoute

            // Create the route query from HealthKit.
            let query = HKWorkoutRouteQuery(route: route) { (query, locationsOrNil, done, errorOrNil) in
                // This block may be called multiple times.
                if let error = errorOrNil {
                    print("Error \(error.localizedDescription)")
                    return
                }

                guard let locations = locationsOrNil else {
                    fatalError("*** NIL found in locations ***")
                }

                let latitudes = locations.map {
                    $0.coordinate.latitude
                }
                let longitudes = locations.map {
                    $0.coordinate.longitude
                }

                // Outline map region to display
                guard let maxLat = latitudes.max() else { fatalError("Unable to get maxLat") }
                guard let minLat = latitudes.min() else { return }
                guard let maxLong = longitudes.max() else { return }
                guard let minLong = longitudes.min() else { return }

                if done {
                    let mapCenter = CLLocationCoordinate2D(latitude: (minLat + maxLat) / 2, longitude: (minLong + maxLong) / 2)
                    let mapSpan = MKCoordinateSpan(latitudeDelta: (maxLat - minLat) * mapDisplayAreaPadding,
                                                  longitudeDelta: (maxLong - minLong) * mapDisplayAreaPadding)

                    DispatchQueue.main.async {
                        // Push to main thread to drop dots on the map.
                        // Without this a warning will occur.
                        self.region = MKCoordinateRegion(center: mapCenter, span: mapSpan)
                        locations.forEach { (location) in
                            self.overlayRoute(at: location)
                        }
                    }
                }
                // stop the query by calling:
                // store.stop(query)
            }
            healthStore.execute(query)
        }

        routeQuery.updateHandler = { (query, samples, deleted, anchor, error) in
            guard error == nil else {
                // Handle any errors here.
                fatalError("The update failed.")
            }
            // Process updates or additions here.
        }
        healthStore.execute(routeQuery)
    }

我无法确定为什么 map 注释仅以突发方式显示。我已经改了 CLLocationManager.distanceFilter到不同的值以及 kCLDistanceFilterNone .对于 CoreLocation 授权，我使用了 whileInUse 和 Always 授权，更新频率没有变化。似乎更新是按时间间隔进行的，而不是经过的距离，但我不能完全确定。让应用程序在屏幕上和后台都处于事件状态似乎对位置更新没有影响。
任何见解都非常感谢。
以下是要读取的 HealthKit 类型和共享设置代码的类型:

public func setupWorkoutSession() {
        let authorizationStatus = healthStore.authorizationStatus(for: HKWorkoutType.workoutType())
        let typesToShare: Set = [HKQuantityType.workoutType(), HKSeriesType.workoutRoute()]

        let typesToRead: Set = [
            HKQuantityType.quantityType(forIdentifier: .heartRate)!,
            HKQuantityType.quantityType(forIdentifier: .activeEnergyBurned)!,
            HKQuantityType.quantityType(forIdentifier: .distanceWalkingRunning)!,
            HKSeriesType.workoutType(),
            HKSeriesType.workoutRoute()
        ]

        if authorizationStatus == .sharingDenied {
            showAlertView()
            return
        }

        // Request authorization for those quantity types.
        healthStore.requestAuthorization(toShare: typesToShare, read: typesToRead) { (success, error) in
            if success {
                self.beginWorkout()
            } else if error != nil {
                // Handle errors.
            }
        }
    }

Answer 1

从您的问题中不清楚这些是前台更新还是后台更新，但考虑到这些间隔似乎也经常出现，我怀疑您主要是在获取后台位置更新。
您已经获得了 activityType设置为 .fitness ，我相信它提供了最高分辨率，但无论如何 iOS 仍然会定期让位置管理器休眠以节省能量。
由于您正在收集您期望的或多或少的恒定运动场景，因此设置 pausesLocationUpdatesAutomatically 也是一个好主意。至 false - 通过健身/运行场景的开始和停止，明确控制 CLManager 的操作。这将消耗更多电池，但应该为您提供更一致的更新。
您仍然可能会有一些差距，最好的解决方案可能是根据您收到它们时的时间戳在这些差距之间插入路线位置。在一些人口稠密的城市地区，您可能还需要或想要平滑或以其他方式限制路线点，因为我发现获得穿过建筑物的路线位置而不是显示您所在的街道或人行道是“容易的”走在。在天际线更开阔和建筑物较低的地方，我几乎没有看到这个问题。