Find the distance between my location and a point in ios - ios

Question

I am using a method to get my location:
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
CLLocation *currentLocation = newLocation;
NSLog(#"%#", currentLocation);}
//new method to find the distance
-(void) zoomToNearestSpot: (NSArray *) spot location: (CLLocation *)myLocation
{
myLocation = currentLocation;
spot = chSpot;
for (int i=0; i< spot.count; i++)
{
ChargingSpots *mySpot = [spot objectAtIndex:i];
CLLocation *thePoint = [[CLLocation alloc]initWithLatitude:[mySpot.LocationLat doubleValue] longitude:[mySpot.LocationLong doubleValue]];
CLLocationDistance dist = [myLocation distanceFromLocation:thePoint];
NSLog(#"%f", dist);
you get here **distance** in meter so in assumption **20 miles = 32187 meter**
put condition such like
if(distance <= 32187)
{
// under 20 miles you can add the zoom level
}
else
{
// out of 20 miles
}
}
}
First, I need to show all of the spots on the map by zooming out according to their number then find the nearest spots and zoom in the camera on them in.

Answer 1

you have more the two coordinate
1) current (user Location)
2) another coordinate ..
Here distanceFromLocation: method is use for get distance between two location.
CLLocationDistance distance = [currentLOcation distanceFromLocation:anotherLocation];
for example where you need add the following lines
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
CLLocation *currentLocation = newLocation;
for (int i=0; i<chSpot.count; i++)
{
ChargingSpots *spot = [chSpot objectAtIndex:i];
NSString *locLat = spot.LocationLat;
NSString *locLong = spot.LocationLong;
CLLocation *LocationAtual = [[CLLocation alloc] initWithLatitude: locLat longitude: locLong];
CLLocationDistance distanceBetween = [currentLocation
distanceFromLocation: LocationAtual];
NSString *tripString = [[NSString alloc]
initWithFormat:#"%f",
distanceBetween];
NSLog(#"DIST: %f", tripString);
}
}

Answer 2

you can use this code
1.) CLLocation *loc=[[CLLocation alloc]initWithLatitude:spot.LocationLat longitude:spot.LocationLong];
2.) CLLocationDistance distanceInMeters=[currentLocation distanceFromLocation:loc];
This will help.ThankYou