CLLocationCoordinate2D to CLLocation

Question

I have the following loop in my viewDidLoad:

for(int i=1; i<[eventsArray count]; i++) {
    NSArray *componentsArray = [[eventsArray objectAtIndex:i] componentsSeparatedByString:@","];
    if([componentsArray count] >=6) {
        Koordinate *coord = [[Koordinate alloc] init];
        coord.latitude = [[componentsArray objectAtIndex:0] floatValue];
        coord.longtitude = [[componentsArray objectAtIndex:1] floatValue];
        coord.magnitude = [[componentsArray objectAtIndex:2] floatValue];
        coord.depth = [[componentsArray objectAtIndex:3] floatValue];
        coord.title = [componentsArray objectAtIndex:4];
        coord.strasse = [componentsArray objectAtIndex:5];
        coord.herkunft = [componentsArray objectAtIndex:6];
        coord.telefon = [componentsArray objectAtIndex:7];
        coord.internet = [componentsArray objectAtIndex:8];
        [eventPoints addObject:coord];
    }
}

coord is of Type CLLocationCoordinate2D

How can I use coord in the following method? I need this to get distance between two coords:

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation {

}

`coord` is not a `CLLocationCoordinate2D`, `coord` is an object you created yourself, an instance of `Koordinate`. — nevan king, Feb 23 '10 at 15:11

score 43 · Accepted Answer · edited Jun 29 '22 at 19:16

43

CLLocation has an init method that takes a latitude and longitude:

-(id)initWithLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude

Then use the following method to get the distance between two CLLocation objects:

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

edited Jun 29 '22 at 19:16

pkamb

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answered Feb 23 '10 at 14:42

AlexVogel

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What kind of distance is this? Great circle? Rhumb line? – Maciej Swic Jan 05 '11 at 18:27
1

I believe it's Great Circle, but the method "getDistanceFrom" has been deprecated. It was replaced with "distanceFromLocation". – mpemburn Jul 19 '12 at 16:28

score 15 · Answer 2 · answered Jul 18 '14 at 20:49

15

Simple

CLLocation *location = [[CLLocation alloc] initWithLatitude:lat longitude:lon];

answered Jul 18 '14 at 20:49

Can Ürek

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score 12 · Answer 3 · answered Nov 11 '14 at 18:19

For the Swift crowd,

I have a method called "fetchCafesArroundLocation" which is refreshed after the map gets moved around. This is how I handled getting the Lat and Lon into CLLocation from CLLocationCoordiate2d and then passed the CLLocation variable to the handling method.

func mapView(mapView: MKMapView!, regionDidChangeAnimated animated: Bool){

    var centre = mapView.centerCoordinate as CLLocationCoordinate2D

    var getLat: CLLocationDegrees = centre.latitude
    var getLon: CLLocationDegrees = centre.longitude


    var getMovedMapCenter: CLLocation =  CLLocation(latitude: getLat, longitude: getLon)

    self.lastLocation = getMovedMapCenter
    self.fetchCafesAroundLocation(getMovedMapCenter)

}

score 2 · Answer 4 · answered Feb 24 '10 at 16:05

2

“how can i use my instance as CLLocation?”

You can't, because it isn't one. You need to create one.

Don't forget to release what you alloc. See the memory management rules.

answered Feb 24 '10 at 16:05

Peter Hosey

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pkamb · Answer 5 · 2022-06-29T19:33:21.790

Swift extension for if you're doing CLLocationCoordinate2D to CLLocation conversions a lot, with a built-in check for validity.

Strange that there is not a convenience initializer built in to Core Location.

extension CLLocation {
    convenience init?(_ coordinate2D: CLLocationCoordinate2D) {
        guard CLLocationCoordinate2DIsValid(coordinate2D) else { return nil }
        self.init(latitude: coordinate2D.latitude, longitude: coordinate2D.longitude)
    }
}

use like so:

let location2D = CLLocationCoordinate2D(latitude: 37.3346, longitude: -122.0090)
let location = CLLocation(location2D)

score 0 · Answer 6 · edited Oct 27 '14 at 08:16

If coord is a CCLocationCoordinate2D, then you can assign the newLocation from the

**- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation**

delegate by getting both of the latitude and longitude properties of coordinate property of the CLLocation as below:

coord.latitude = newLocation.coordinate.latitude;
coord.longitude = newLocation.coordinate.longitude;

CLLocationCoordinate2D to CLLocation

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