使用 Core Location 在 Apple Watch 上获取室内精确和准确的位置更新？答案

【问题标题】：Getting precise and accurate location updates indoors on the Apple Watch using Core Location?使用 Core Location 在 Apple Watch 上获取室内精确和准确的位置更新？
【发布时间】：2018-12-28 23:49:03
【问题描述】：

我正在尝试获取锻炼跟踪（室内）的位置更新，因此我需要非常精确和持续的位置更新，但在测试委托回调时似乎不是很准确。例如，移动 20-30 英尺在大多数情况下不会触发位置更新。下面我的代码中是否有任何内容可能导致这种不准确？

  import CoreLocation

    protocol UserLocationDelegate: class {
        func didUpdateUserLocation(_ manager: WorkoutLocationManager, distance: CLLocationDistance)
    }


    class WorkoutLocationManager: NSObject, CLLocationManagerDelegate {

        deinit {
            self.locationManager?.stopUpdatingLocation()
        }

        private var locationManager: CLLocationManager?
        var previousLocation: CLLocation?
        weak var userLocationDelgate: UserLocationDelegate?

        public func getUserLocation() {
            guard CLLocationManager.locationServicesEnabled() else {
                print("User does not have location services enabled")
                return
            }

            locationManager = CLLocationManager()
            locationManager?.delegate = self
            locationManager?.allowsBackgroundLocationUpdates = true
            locationManager?.desiredAccuracy = kCLLocationAccuracyBest
            locationManager?.activityType = .fitness //test as the docs say this will turn OFF indoor tracking

            let locationAuthorizationStatus = CLLocationManager.authorizationStatus()

            switch locationAuthorizationStatus {
            case .authorizedAlways:
                print("location authorized Always")
                locationManager?.startUpdatingLocation()
            case .authorizedWhenInUse:
                print("location authorized When in Use")
                locationManager?.startUpdatingLocation()
            case .denied:
                print("location authorization denied")
                locationManager?.requestAlwaysAuthorization()
            case .notDetermined:
                print("location authorization not determined")
                 locationManager?.requestAlwaysAuthorization()

            case .restricted:
                print("location authorization restricted")
                 locationManager?.requestAlwaysAuthorization()

            }

        }


        // MARK: - CLLocationManagerDelegate



        func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

            print("did update locations called")

            if previousLocation == nil {
                previousLocation = locations.first
            } else {
                guard let latest = locations.first else { return }
                let distanceInMeters = previousLocation?.distance(from: latest) ?? 0
                if distanceInMeters > 0 {
                    let distanceInFeet = distanceInMeters * 3.28
                    print("distance in feet: \(distanceInFeet)")
                    userLocationDelgate?.didUpdateUserLocation(self, distance: distanceInFeet
                    )
                }
                previousLocation = latest
            }

        }

        func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
            print("location manager error = \(error)")
        }

    }




import WatchKit
import Foundation
import CoreLocation


class InterfaceController: WKInterfaceController, UserLocationDelegate {
    func didUpdateUserLocation(_ manager: WorkoutLocationManager, distance: CLLocationDistance) {
        locationLabel.setText("\(distance.rounded().description) feet")
    }


    let workoutLocationManager = WorkoutLocationManager()


    @IBOutlet weak var locationLabel: WKInterfaceLabel!

    override func awake(withContext context: Any?) {
        super.awake(withContext: context)

        workoutLocationManager.getUserLocation()
        workoutLocationManager.userLocationDelgate = self

    }

【问题讨论】：

标签： ios swift core-location cllocationmanager apple-watch

【解决方案1】：

您将kCLLocationAccuracyBest 设置为desiredAccuracy。 CLLocationAccuracy 有变量，应该更准确

kCLLocationAccuracyBestForNavigation

【讨论】：

但是导航不是指驾驶而不是跑步等吗？
谢谢，我会测试一下，看看我是否能得到更好的结果。我没有使用 kCLLocationAccuracyBest 的另一个原因是文档说仅在设备连接到电源时使用，这对于锻炼用例显然不实用。
@GarySabo 你是对的。无论如何，你可以尝试一下，你会看到的。或者，您可以在不使用 kCL... 变量的情况下设置自己的准确度
我测试过了，kCLLocationAcurracyBest 和 kCCLocationAccuracyBestForNagivation 在户外都可以很好地工作，但在室内都不能很好地工作？我了解屋顶下 GPS 的局限性，但我使用过仅使用核心位置且在室内准确的其他应用，他们是如何做到的？
@GarySabo 哦，那是另一个问题。你能给我举一个在室内运行良好的应用程序示例吗？也许我们可以弄清楚为什么会这样。