Как узнать расстояние между координатами?

Question

Я хочу сделать так, чтобы он показывал величину расстояния между двумя координатами CLLocation. Есть ли способ сделать это без сложной математической формулы? Если нет, как бы вы сделали это с формулой?

Answer 1

У CLLocation есть метод distanceFromLocation, поэтому даны два CLLocation:

CLLocationDistance distanceInMeters = [location1 distanceFromLocation:location2];

или в 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

Вы получаете здесь расстояние в метрах, так что 1 миль = 1609 метров

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

Answer 2

Swift 4.1

импортировать 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 3

Попробуйте это:

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

Из документации Apple:

Возвращаемое значение: расстояние (в метрах) между двумя точками.

Answer 4

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

Answer 5

Для быстрой 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 6

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 7

Вы также можете использовать алгоритм HaversineDistance, как и разработчики Android, это полезно, когда у вас есть другое приложение в Android, похожее на него, иначе приведенный выше ответ будет для вас правильным.

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)

Я выбрал код, написанный выше, по ссылке https://github.com/raywenderlich/swift-algorithm-club/blob/master/HaversineDistance/HaversineDistance.playground/Contents.swift

Answer 8

Для объектива-с

Ты можешь использовать distanceFromLocation найти расстояние между двумя координатами.

Фрагменты кода:

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

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

CLLocationDistance distance = [loc1 distanceFromLocation:loc2];

Ваш выход будет в метрах.

Answer 9

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 10

Свифт 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
    }

использовать для

let distance = calculateDistance("add parameters")