计算总行驶距离 iOS Swift

Question

如何在 Swift

中使用 CoreLocation 计算总行进距离

到目前为止，我无法在 Swift 中找到有关如何执行此操作的任何资源 for iOS 8,

您如何计算自您开始跟踪您的位置以来移动的总距离？

根据我目前所读的内容，我需要保存一个点的位置，然后计算当前点和最后一个点之间的距离，然后将该距离添加到 totalDistance 变量

Objective-C 对我来说非常陌生，所以我一直无法弄清楚 swift 语法

这是我到目前为止所做的，不确定我是否做对了。虽然 distanceFromLocation 方法返回的都是 0.0，但显然有问题

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
     var newLocation: CLLocation = locations[0] as CLLocation

    oldLocationArray.append(newLocation)
           var totalDistance = CLLocationDistance()
    var oldLocation = oldLocationArray.last

    var distanceTraveled = newLocation.distanceFromLocation(oldLocation)

    totalDistance += distanceTraveled

 println(distanceTraveled)



}

Answer 1

更新：Xcode 8.3.2 • Swift 3.1

这里的问题是因为您总是一遍又一遍地到达相同的位置。像这样尝试：

import UIKit
import MapKit

class ViewController: UIViewController,  CLLocationManagerDelegate {
    @IBOutlet weak var mapView: MKMapView!
    let locationManager = CLLocationManager()
    var startLocation: CLLocation!
    var lastLocation: CLLocation!
    var startDate: Date!
    var traveledDistance: Double = 0
    override func viewDidLoad() {
        super.viewDidLoad()
        if CLLocationManager.locationServicesEnabled() {
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyBest
            locationManager.requestWhenInUseAuthorization()
            locationManager.startUpdatingLocation()
            locationManager.startMonitoringSignificantLocationChanges()
            locationManager.distanceFilter = 10
            mapView.showsUserLocation = true
            mapView.userTrackingMode = .follow
        }
    }
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        if startDate == nil {
            startDate = Date()
        } else {
            print("elapsedTime:", String(format: "%.0fs", Date().timeIntervalSince(startDate)))
        }
        if startLocation == nil {
            startLocation = locations.first
        } else if let location = locations.last {
            traveledDistance += lastLocation.distance(from: location)
            print("Traveled Distance:",  traveledDistance)
            print("Straight Distance:", startLocation.distance(from: locations.last!))
        }
        lastLocation = locations.last
    }
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        if (error as? CLError)?.code == .denied {
            manager.stopUpdatingLocation()
            manager.stopMonitoringSignificantLocationChanges()
        }
    }
}

Sample Project

Answer 2

如果您想计算两点之间的路线距离，您需要使用MKDirectionsRequest，这将为您return一条或多条路线从 A 点到 B 点的逐步说明：

class func caculateDistance(){
    var directionRequest = MKDirectionsRequest()
    var sourceCoord = CLLocationCoordinate2D(latitude: -36.7346287, longitude: 174.6991812)
    var destinationCoord = CLLocationCoordinate2D(latitude: -36.850587, longitude: 174.7391745)
    var mkPlacemarkOrigen = MKPlacemark(coordinate: sourceCoord, addressDictionary: nil)
    var mkPlacemarkDestination = MKPlacemark(coordinate: destinationCoord, addressDictionary: nil)
    var source:MKMapItem = MKMapItem(placemark: mkPlacemarkOrigen)
    var destination:MKMapItem = MKMapItem(placemark: mkPlacemarkDestination)
    directionRequest.setSource(source)
    directionRequest.setDestination(destination)
    var directions = MKDirections(request: directionRequest)
    directions.calculateDirectionsWithCompletionHandler {
        (response, error) -> Void in
        if error != nil { println("Error calculating direction - \(error.localizedDescription)") }
        else {
            for route in response.routes{
                println("Distance = \(route.distance)")
                for step in route.steps!{
                    println(step.instructions)
                }  
            }
        }
    }
}

此示例代码将 return 您：

Distance
Distance = 16800.0

Step by Step instructions
Start on the route
At the end of the road, turn left onto Bush Road
Turn right onto Albany Expressway
At the roundabout, take the first exit onto Greville Road toward 1, Auckland
At the roundabout, take the third exit to merge onto 1 toward Auckland
Keep left
Take exit 423 onto Shelly Beach Road
Continue onto Shelly Beach Road
At the end of the road, turn right onto Jervois Road
Turn left onto Islington Street
Keep right on Islington Street
Arrive at the destination

可以轻松修改该函数以接收两个位置和return距离以及任何其他需要的信息。

希望对你有所帮助！

Answer 3

Leo Dabus 方法可用于计算您的实际位置与起始位置之间的地理距离。

为了获得精确的行进距离，您必须使用上次位置与旧位置之间的差异来更新"traveledDistance"。

这是我的实现：

var startLocation:CLLocation!
var lastLocation: CLLocation!
var traveledDistance:Double = 0

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    if startLocation == nil {
        startLocation = locations.first as! CLLocation
    } else {
        let lastLocation = locations.last as! CLLocation
        let distance = startLocation.distanceFromLocation(lastLocation)
        startLocation = lastLocation
        traveledDistance += distance 
    }
}

计算总行驶距离 iOS Swift

Calculate Total Traveled Distance iOS Swift

xcode

core-location

cllocation

ios

swift