I'm trying to measure the distance between two coordinates on a map (longitude, latitude). The first coordinate is my current location which is a CLLocation
, and the other one is a pin on the map which is of type CLLocationCoordinate2D
.
I call distanceFromLocation
to get my current location in CLLocation
but it says bad receiver type from CLLocationCoordinate2D
.
CLLocationCoordinate2D locationCoordinate;
// Set the latitude and longitude
locationCoordinate.latitude = [[item objectForKey:@"lat"] doubleValue];
locationCoordinate.longitude = [[item objectForKey:@"lng"] doubleValue];
CLLocationDistance dist = [locationCoordinate distanceFromLocation:locationManager.location.coordinate]; // bad receiver type from CLLocationCoordinate2D
I want to find the distance between these 2 coordinates in metric unit, and I know that types are mismatching, but how to convert them so I can find the distance between these 2 nodes?
Use the below method for finding distance between two locations
-(float)kilometersfromPlace:(CLLocationCoordinate2D)from andToPlace:(CLLocationCoordinate2D)to {
CLLocation *userloc = [[CLLocation alloc]initWithLatitude:from.latitude longitude:from.longitude];
CLLocation *dest = [[CLLocation alloc]initWithLatitude:to.latitude longitude:to.longitude];
CLLocationDistance dist = [userloc distanceFromLocation:dest]/1000;
//NSLog(@"%f",dist);
NSString *distance = [NSString stringWithFormat:@"%f",dist];
return [distance floatValue];
}
For example:
+(double)distanceFromPoint:(double)lat lng:(double)lng
{
CLLocation *placeLocation = [[CLLocation alloc] initWithLatitude:lat longitude:lng];
CLLocationCoordinate2D usrLocation = locationManager.location;
CLLocation * userLocation = [[CLLocation alloc] initWithLatitude:usrLocation.latitude longitude:usrLocation.longitude];
double meters = [userLocation distanceFromLocation:placeLocation];
return meters;
}
Try to convert CLLocationCoordinate2D
to CLLocation
,
Create a CLLocation
object using,
-(id)initWithLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude
Based on @manujmv's answer above, here's a Swift extension (returns metres):
import Foundation
import CoreLocation
extension CLLocationCoordinate2D {
func distanceTo(coordinate: CLLocationCoordinate2D) -> CLLocationDistance {
let thisLocation = CLLocation(latitude: self.latitude, longitude: self.longitude)
let otherLocation = CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude)
return thisLocation.distanceFromLocation(otherLocation)
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.