How to get user's current location from network provider in objective c?

Question

In offline mode how to get user\'s current location in ios, is it possible to get the location by network provider?

Answer 1

I give you full solution.If you want to achieve this you should use core location framework.

First step:

import CoreLocation framework in .h file

#import <CoreLocation/CoreLocation.h>

Second Step: You need to add following things in your plist file

NSLocationWhenInUseUsageDescription string Whatever you want to write write here

NSLocationAlwaysUsageDescription string Whatever you want to write write here

privacy - location usage description string Whatever you want to write write here

Kindly see the screen shot below

Third step:

Add CLLocationManagerDelegate

Fourth step:

Create an instance of the CLLocationManager class and store a strong reference

@property (nonatomic , strong) CLLocationManager *locationManager;

Why do we store CLLocationManager property as strong reference here?

Keeping a strong reference to the location manager object is required until all tasks involving that object are complete. Because most location manager tasks run asynchronously, storing your location manager in a local variable is insufficient.

Now ViewController.h file

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>

@interface ViewController : UIViewController<CLLocationManagerDelegate>
{

}
@property (nonatomic , strong) CLLocationManager *locationManager;
- (IBAction)actionGetCurrentLocation:(id)sender;
@end

Following steps to be implemented in ViewController.m

Fifth step:

Before starting to update the location we should ask permission and instantiate the CLLocationManager.Then we should start updating the location

- (IBAction)actionGetCurrentLocation:(id)sender
{
   locationManager = [[CLLocationManager alloc]init];
   locationManager.delegate = self;
   locationManager.desiredAccuracy = kCLLocationAccuracyBest;
   if([CLLocationManager locationServicesEnabled] == NO){
      NSLog(@"Your location service is not enabled, So go to Settings>Location Services");
    }
   else{
      NSLog(@"Your location service is enabled");
   }
   if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
   {
      [locationManager requestWhenInUseAuthorization];
   }
   [locationManager startUpdatingLocation];
}    

Sixth step:

Add CLLocationManager Delegate methods

ViewController.m

#import "ViewController.h"

@interface ViewController ()
{
   CLLocation *currentLocation;
}
@end
@implementation ViewController
@synthesize locationManager;

- (void)viewDidLoad
{
   [super viewDidLoad];
}
- (void)didReceiveMemoryWarning
{
  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.
}

#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
   NSLog(@"didFailWithError: %@", error);   //@"Error" //@"Failed to Get Your Location"  //@"OK"
   UIAlertController *errorAlert = [UIAlertController alertControllerWithTitle:@"Error" message:@"Failed to Get Your Location" preferredStyle:UIAlertControllerStyleAlert];
   UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){
    [self dismissViewControllerAnimated:YES completion:nil];
    }];
   [self presentViewController:errorAlert animated:YES completion:nil];
   [errorAlert addAction:actionOK];
}


- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    currentLocation = newLocation;
    if (currentLocation != nil)
    {
        NSLog(@"%@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude]);
        NSLog(@"%@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude]);
     }
  }

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
{
    NSLog(@"didUpdateLocation are : %@", locations);
    currentLocation = [locations lastObject];
    if (currentLocation != nil) 
    {
       NSLog(@"The latitude value is - %@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude]);
       NSLog(@"The longitude value is - %@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude]);
     }
}

#pragma mark - UIButton Action
 - (IBAction)actionGetCurrentLocation:(id)sender
{
   locationManager = [[CLLocationManager alloc]init];
   locationManager.delegate = self;
   locationManager.desiredAccuracy = kCLLocationAccuracyBest;
   if([CLLocationManager locationServicesEnabled] == NO){
      NSLog(@"Your location service is not enabled, So go to Settings>Location Services");
    }
   else{
      NSLog(@"Your location service is enabled");
   }
   if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
   {
      [locationManager requestWhenInUseAuthorization];
   }
   [locationManager startUpdatingLocation];
}