Problem

You want to find the latitude and longitude of a device.

Solution

Use the CLLocationManager class:

#import "WSYViewController.h"

#import <MapKit/MapKit.h>

@interface WSYViewController ()<CLLocationManagerDelegate>

@property (nonatomic,strong)CLLocationManager * myLocationManager;

@end

@implementation WSYViewController

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

{

    //we received the new loaction

    NSLog(@"Latitude = %f ",[[locations lastObject] coordinate].latitude);

    NSLog(@"longitude = %f ",[[locations lastObject] coordinate].longitude);

}

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

{

    NSLog(@"Failed to receive user‘s location ");

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    if ([CLLocationManager locationServicesEnabled]) {

        self.myLocationManager = [[CLLocationManager alloc]init];

        self.myLocationManager.delegate = self;

        [self.myLocationManager startUpdatingLocation];

    }else

    {

        //location services are not enabled

        //take appropriate action for instance prompt the user to enable the location services

        NSLog(@"Location services are not enabled");

    }

}

@end

In this code, myLocationManager is a property of type CLLocationManager. The current class is also the delegate of the location manager in this sample code.