在Swift中记录CLLocationPoints时不准确

Question

我正在使用一个应用程序来记录漫步，但我不能让折线像在其他应用程序中看起来那样平滑，比如runkeeper。我尝试过不同的activityType，desiredAccuracy等等。我已经在iPhone 5c、6s和7上测试过了。它看起来总是像示例照片，它是在没有任何建筑物的情况下录制出来的。我是不是漏掉了什么？

这是我的viewDidLoad、viewWillAppear、viewDidAppear、locationManager和rendererFor overlay

import UIKit
import MapKit
import CoreLocation
...
override func viewDidLoad() {
    super.viewDidLoad()
    myLocations = []
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.activityType = .fitness
    manager.distanceFilter = 5
}
override func viewWillAppear(_ animated: Bool) {
    //Map
    logMap.delegate = self
    logMap.mapType = MKMapType.standard

    manager.requestAlwaysAuthorization()
    manager.startUpdatingLocation()
    manager.allowsBackgroundLocationUpdates = true

    logMap.userTrackingMode = MKUserTrackingMode(rawValue: 1)!
}
override func viewDidAppear(_ animated: Bool) {

    let status = CLLocationManager.authorizationStatus()
    if status == .notDetermined || status == .denied || status == 
.authorizedWhenInUse {
        manager.requestAlwaysAuthorization()
        manager.requestWhenInUseAuthorization()
        manager.requestLocation()
    }else{
        manager.startUpdatingLocation()
        logMap.showsUserLocation = true
    }
    if status != .denied {
        manager.startUpdatingLocation()
    }
}
func locationManager(_ manager: CLLocationManager, 
didChangeAuthorization status: CLAuthorizationStatus) {
    if status == .authorizedWhenInUse {
        manager.requestLocation()
    }
    if status == .authorizedAlways {
        logMap.showsUserLocation = true
        logMap.mapType = MKMapType(rawValue: 0)!
        //logMap.userTrackingMode = MKUserTrackingMode(rawValue: 3)!
        manager.startUpdatingLocation()
    }
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations 
locations: [CLLocation]){

    if(isLoging==true){
        if(myLocations.count > 1){
            self.distance = self.distance + 
Int(locations[0].distance(from: myLocations.last!))
        }
            myLocations.append(locations[0])
            setDistance()
    }
    // paint line
    if (myLocations.count > 1){
        let sourceIndex = myLocations.count - 1
        let destinationIndex = myLocations.count - 2

        let c1 = myLocations[sourceIndex].coordinate
        let c2 = myLocations[destinationIndex].coordinate
        var a = [c1, c2]
        let polyline = MKPolyline(coordinates: &a, count: a.count)
        logMap.add(polyline)
    }
}
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    if overlay is MKPolyline {
        let polylineRenderer = MKPolylineRenderer(overlay: overlay)
        polylineRenderer.strokeColor = UIColor.blue
        polylineRenderer.lineWidth = 4
        return polylineRenderer
    }
    return MKPolylineRenderer(overlay: overlay)
}

结果：

​

Answer 1

尝试将distanceFilter设置为k​CLDistance​Filter​None。这将通知您的每一个动作，但将消耗最多的电池。

即使你在建筑物的外面，你仍然不能得到完美的准确性。如果我要猜测其他健身应用程序，假设你不会跑过建筑物和东西，所以他们会调整你的路径以匹配街道。

我知道一个事实，斯特拉瓦在建筑物和花园中展示了我的道路，因为它们不能得到完美的准确性。

Answer 2

这样做可以获得最佳的精确度，以便每次都能获得您的位置。

override func loadView() {

    print("loadView called")

    // Enable some map settings

    map.isMyLocationEnabled = true
    map.settings.myLocationButton = true
    map.settings.compassButton = true
    map.settings.scrollGestures = true
    map.settings.zoomGestures = true
    map.delegate = self

    view = map

}

override func viewDidLoad() {

    super.viewDidLoad()

    print("ViewDidLoad called")

    // Configuring location manager.

    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.startUpdatingLocation()
    locationManager.startMonitoringSignificantLocationChanges()

}

在ViewController中添加代理: CLLocationManagerDelegate，GMSMapViewDelegate

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

    print("locationManager function called")

    // Fetch current location coordinates

    let locValue:CLLocationCoordinate2D = (locationManager.location?.coordinate)!
    currentLatitude = locValue.latitude
    currentLongitude = locValue.longitude
    print("Current Location = \(currentLatitude!), \(currentLongitude!)")

    // Zoom to current location

    let target = CLLocationCoordinate2D(latitude: currentLatitude!, longitude: currentLongitude!)
    map.camera = GMSCameraPosition.camera(withTarget: target, zoom: 17)

    locationManager.stopUpdatingLocation()

    //DispatchQueue.main.asyncAfter(deadline: .now() + 1.75, execute: {self.webResponse()})

}