How to get device current latitude and longitude for IPhone device - iphone

Question

I'm developing an app were I would like to get device current latitude and longitude for IPhone. Is it possible to obtain this information without using GPS.
Thanks

Answer 1

you can use CoreLocation framework
The Core Location framework has one important class CLLocationManager.
The CLLocationManager class handles sending out updates to a delegate anytime the location is changed. it uses the delegate CLLocationManagerDelegate protocol.
you can use it like
#import <CoreLocation/CoreLocation.h>
#interface ViewController : UIViewController
<CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
}
set up locationManager like this in viewDidLoad
- (void)viewDidLoad {
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
[locationManager startUpdatingLocation];
}
implement the below delegate mehod for getting changed location
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
NSInteger degrees = newLocation.coordinate.latitude;
double decimal = fabs(newLocation.coordinate.latitude - degrees);
int minutes = decimal * 60;
double seconds = decimal * 3600 - minutes * 60;
NSString *lattitudeStr = [NSString stringWithFormat:#"%d° %d' %1.4f\"",
degrees, minutes, seconds];
lattitudeLabel.text = lattitudeStr;
degrees = newLocation.coordinate.longitude;
decimal = fabs(newLocation.coordinate.longitude - degrees);
minutes = decimal * 60;
seconds = decimal * 3600 - minutes * 60;
NSString *longitudeStr = [NSString stringWithFormat:#"%d° %d' %1.4f\"",
degrees, minutes, seconds];
longitudeLabel.text = longitudeStr;
}

Answer 2

You can use CLLocationManager to get current lat and long.
create an iVar of CLLocationManager and use it.
Here is the code:
- (void)viewDidLoad
{
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
NSLog(#"OldLocation %f %f", oldLocation.coordinate.latitude, oldLocation.coordinate.longitude);
NSLog(#"NewLocation %f %f", newLocation.coordinate.latitude, newLocation.coordinate.longitude);
currentLat = [NSString stringWithFormat:#"%f",newLocation.coordinate.latitude];
currentLong = [NSString stringWithFormat:#"%f",newLocation.coordinate.longitude];
}

Answer 3

CLLocationManager *locationManager = [[CLLocationManager alloc] init];
CLLocation* currentLocation = [locationManager location];
NSString *loc = [NSString stringWithFormat:#"%f,%f",currentLocation.coordinate.latitude, currentLocation.coordinate.longitude];
NSLog(#"location:%#", loc);

Answer 4

You can get current location without GPS by using CLLocationManager if the device has WiFi or cellular data service. The location will not be as accurate as you would get from GPS but you get a result faster than from GPS.
You can request a non-GPS location from CLLocationManager by setting the desiredAccuracy property to kCLLocationAccuracyKilometer.

Answer 5

Using Swift
import CoreLocation
Get current location
let locationManager = CLLocationManager()
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.desiredAccuracy = kCLLocationAccuracyBest
//get the most recently retrieved user location
if let currentLocation = locationManager.location {
let longitude = currentLocation.coordinate.longitude
let latitude = currentLocation.coordinate.latitude
//work with the received data
}
Note that locationManager.location is an optional and hence should be safely unwrapped.