如何找出坐标之间的距离？

Question

我想让它显示两个 CLLocation 坐标之间的距离。有没有办法不用复杂的数学公式就可以做到这一点？如果没有你会如何用公式来做？

Answer 1

对于objective-c

您可以使用distanceFromLocation 来计算两个坐标之间的距离。

代码片段：

CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:lat1 longitude:lng1];

CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:lat2 longitude:lng2];

CLLocationDistance distance = [loc1 distanceFromLocation:loc2];

您的输出将以米为单位。

Answer 2

CLLocation 有一个 distanceFromLocation 方法所以给定两个 CLLocations:

CLLocationDistance distanceInMeters = [location1 distanceFromLocation:location2];

或 Swift 4:

//: Playground - noun: a place where people can play

import CoreLocation


let coordinate₀ = CLLocation(latitude: 5.0, longitude: 5.0)
let coordinate₁ = CLLocation(latitude: 5.0, longitude: 3.0)

let distanceInMeters = coordinate₀.distance(from: coordinate₁) // result is in meters

你到达这里距离在米所以 1 英里 = 1609米

if(distanceInMeters <= 1609)
 {
 // under 1 mile
 }
 else
{
 // out of 1 mile
 }

Answer 3

试试这个：

distanceInMeters = fromLocation.distanceFromLocation(toLocation)
distanceInMiles = distanceInMeters/1609.344

来自Apple Documentation：

Return Value: The distance (in meters) between the two locations.

Answer 4

func calculateDistanceInMiles(){

    let coordinate₀ = CLLocation(latitude:34.54545, longitude:56.64646)
    let coordinate₁ = CLLocation(latitude: 28.4646, longitude:76.65464)
    let distanceInMeters = coordinate₀.distance(from: coordinate₁)
    if(distanceInMeters <= 1609)
    {
        let s =   String(format: "%.2f", distanceInMeters)
        self.fantasyDistanceLabel.text = s + " Miles"
    }
    else
    {
        let s =   String(format: "%.2f", distanceInMeters)
        self.fantasyDistanceLabel.text = s + " Miles"

    }
}

Answer 5

Swift 4.1

import CoreLocation

//My location
let myLocation = CLLocation(latitude: 59.244696, longitude: 17.813868)

//My buddy's location
let myBuddysLocation = CLLocation(latitude: 59.326354, longitude: 18.072310)

//Measuring my distance to my buddy's (in km)
let distance = myLocation.distance(from: myBuddysLocation) / 1000

//Display the result in km
print(String(format: "The distance to my buddy is %.01fkm", distance))

Answer 6

对于swift 4

   let locationOne = CLLocation(latitude: lat, longitude: long)
   let locationTwo = CLLocation(latitude: lat,longitude: long)

  let distance = locationOne.distance(from: locationTwo) * 0.000621371

  distanceLabel.text = "\(Int(round(distance))) mi"

Answer 7

Swift 5.

func calculateDistance(mobileLocationX:Double,mobileLocationY:Double,DestinationX:Double,DestinationY:Double) -> Double {

        let coordinate₀ = CLLocation(latitude: mobileLocationX, longitude: mobileLocationY)
        let coordinate₁ = CLLocation(latitude: DestinationX, longitude:  DestinationY)

        let distanceInMeters = coordinate₀.distance(from: coordinate₁)

        return distanceInMeters
    }

用于

let distance = calculateDistance("add parameters")

Answer 8

import UIKit
import CoreLocation

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        var currentLocation = CLLocation(latitude: 23.1929, longitude: 72.6156)
        var DestinationLocation = CLLocation(latitude: 23.0504, longitude: 72.4991)
        var distance = currentLocation.distance(from: DestinationLocation) / 1000
        print(String(format: "The distance to my buddy is %.01fkm", distance))
    }
}

Answer 9

您也可以像 android 开发人员使用的那样使用 HaversineDistance algorithm，当您在 android 中有另一个与它类似的应用程序时，这会很有帮助，否则上面的答案对您来说是正确的.

import UIKit

func haversineDinstance(la1: Double, lo1: Double, la2: Double, lo2: Double, radius: Double = 6367444.7) -> Double {

let haversin = { (angle: Double) -> Double in
    return (1 - cos(angle))/2
}

let ahaversin = { (angle: Double) -> Double in
    return 2*asin(sqrt(angle))
}

// Converts from degrees to radians
let dToR = { (angle: Double) -> Double in
    return (angle / 360) * 2 * .pi
}

let lat1 = dToR(la1)
let lon1 = dToR(lo1)
let lat2 = dToR(la2)
let lon2 = dToR(lo2)

return radius * ahaversin(haversin(lat2 - lat1) + cos(lat1) * cos(lat2) * haversin(lon2 - lon1))
}

let amsterdam = (52.3702, 4.8952)
let newYork = (40.7128, -74.0059)

// Google says it's 5857 km so our result is only off by 2km which could be due to all kinds of things, not sure how google calculates the distance or which latitude and longitude google uses to calculate the distance.
haversineDinstance(la1: amsterdam.0, lo1: amsterdam.1, la2: newYork.0, lo2: newYork.1)

我从参考文献中挑选了上面写的代码link https://github.com/raywenderlich/swift-algorithm-club/blob/master/HaversineDistance/HaversineDistance.playground/Contents.swift

Answer 10

import CoreLocation

//My location
let myLocation = CLLocation(latitude: 31.5101892, longitude: 74.3440842)

//My Next Destination
let myNextDestination = CLLocation(latitude: 33.7181584, longitude: 73.071358)

//Finding my distance to my next destination (in km)
let distance = myLocation.distance(from: myNextDestination) / 1000

如何找出坐标之间的距离？

How to find out distance between coordinates?

cllocation

ios

cllocationdistance

swift