CLLocationDistance conversion

Question

i have distance in a variable of type CLLocationDistance i need to convert it in a integer variable how can i do it

i have use

CLLocationDistance kilometers;

int distance = [kilometers intValue];

but its giving error.

help guys

The error that you're receiving may be helpful (to others). Please include it. — KevinDTimm, Feb 03 '11 at 16:01

0x8badf00d · Accepted Answer · 2012-02-25T11:50:48.660

15

https://developer.apple.com/library/mac/#documentation/CoreLocation/Reference/CLLocation_Class/CLLocation/CLLocation.html

distanceFromLocation:

Returns the distance (in meters) from the receiver’s location to the specified location.

- (CLLocationDistance)distanceFromLocation:(const CLLocation *)location

Parameters

location The other location.

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

return type is double not int. And its not an NSNumber.

edited Feb 25 '12 at 11:50

answered Feb 03 '11 at 15:48

0x8badf00d

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To clarify, since it's a Double (an intrinsic type, not an object) there is no [intValue] method to run. Since you're willing to lose accuracy, just assign the value. If you want to round it, just add .5 and then assign it. – KevinDTimm Feb 03 '11 at 16:01

score 13 · Answer 2 · answered Jul 05 '18 at 14:18

As of iOS 10, there's a new Measurement class which makes converting distances a snap.

Here's an extension to convert distances:

extension Double {
  func convert(from originalUnit: UnitLength, to convertedUnit: UnitLength) -> Double {
    return Measurement(value: self, unit: originalUnit).converted(to: convertedUnit).value
  }
}

Example usage:

let miles = 1.0
let metersInAMile = miles.convert(from: .miles, to: .meters)

let mileInFeet = 5280.0
let feetInAMile = mileInFeet.convert(from: .feet, to: .miles)

let marathonInFeet = 138_435.0
let milesInMarathon = marathonInFeet.convert(from: .feet, to: .miles)
let kmInMarathon = marathonInFeet.convert(from: .feet, to: .kilometers)

let inch = 1.0
let centimetersInInch = inch.convert(from: .inches, to: .centimeters)

score 11 · Answer 3 · edited Oct 06 '15 at 01:10

This will calculate the distance between two location by using the CLLocationDistance. By default it gives the values in meters. To convert to kilometers, divide the CLLocationDistance/1000.0. To get miles multiply the CLLocationDistance*0.62137.

 //Pass your current location Latitude and longitude
                     CLLocation *currentlocation = [[CLLocation alloc] initWithLatitude:13.015370f  longitude:80.200393f];
 //Pass your destination location Latitude and longitude 
CLLocation *destination = [[CLLocation alloc] initWithLatitude:37.420948f longitude:-122.09578499999998f];
CLLocationDistance meters = [currentlocation distanceFromLocation:destination];
//get distance in meters
    NSLog(@"meters :%f", meters);
//get distance in kilometers
    CLLocationDistance kilometers = meters / 1000.0;
    NSLog(@"kilometers :%f", kilometers);
//Get distance in miles
    NSLog(@"Miles:%f",kilometers*0.62137);
//convert kilometers to int value
    int num=kilometers;

Please add an explanation to improve the answer; code-only answers are discouraged! Thanks! — namezero, Aug 10 '15 at 10:10
This to calculate distance between two latitude and longitude by using the CLLocationDistance by default it gives the values in meters. To convert to kilometer divide the CLLocationDistance/1000.0.To get miles multiply the CLLocationDistance*0.62137 — Kamalkumar.E, Aug 10 '15 at 10:35

score 7 · Answer 4 · answered Jan 11 '18 at 18:09

SWIFT 4

Late to this party, but you can also create an extension like this:

CLLocationDistance.swift

import UIKit
import CoreLocation

extension CLLocationDistance {
    func inMiles() -> CLLocationDistance {
        return self*0.00062137
    }

    func inKilometers() -> CLLocationDistance {
        return self/1000
    }
}

You could call it as follow:

distance.inKilometers()

I hope this helps anyone stumbling on this!

score 4 · Answer 5 · answered Mar 31 '16 at 05:15

Swift:

  var initialLocation :CLLocation?
  var updatedUserLocation :CLLocation?
  var distanceBetweenLocations: CLLocationDistance?

//MK MapView Delegate
  func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    updatedUserLocation = locations.last
    distanceBetweenLocations =  updatedUserLocation!.distanceFromLocation(initialLocation!)

    //convert To Miles
    distanceBetweenLocations = Utility.convertCLLocationDistanceToMiles(distanceBetweenLocations)

//Setting Distance Value
    distanceLabel.text = String(format: " Distance : %.2f ", distanceBetweenLocations!)

  }

Note : I have class named Utility which serves the common class methods across the project . This is for better code reusability and reduction.

//  Utility.swift

import UIKit
import Foundation
import CoreLocation

class Utility {

  class func convertCLLocationDistanceToMiles (var targetDistance : CLLocationDistance?) -> CLLocationDistance {
    targetDistance =  targetDistance!*0.00062137
    return targetDistance!
  }
  class func convertCLLocationDistanceToKiloMeters (var targetDistance : CLLocationDistance?) -> CLLocationDistance {
    targetDistance =  targetDistance!/1000
    return targetDistance!
  }

}

score 0 · Answer 6 · answered Jan 30 '23 at 20:01

It's so much easier in Swift:

// Use you CLLocationDistance as the value 'kilometers':    
let kms = Measurement(value: kilometers, unit: UnitLength.kilometers)
// Then you can convert that to miles if you'd like:
let miles = kms.converted(to: .miles)
// Get the double value:
let doubleValue = miles.value
print("The distances is \(doubleValue) miles")

CLLocationDistance conversion

6 Answers6

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