Getting Longitude/Latitude of the User When the viewDidLoad

My purpose is to get the longitude/latitude of the user when the view is loaded and to store the values in two variables for later calculations. I don't need to track the user location and to update it, I simply need to get his/her coordinates once. My code looks like this:

- (void)viewDidLoad {
    [super viewDidLoad];
    // locationManager update as location
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self; 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
    locationManager.distanceFilter = kCLDistanceFilterNone; 
    [locationManager startUpdatingLocation];
    CLLocatio开发者_运维百科n *location = [locationManager location];
    // Configure the new event with information from the location
    CLLocationCoordinate2D coordinate = [location coordinate];

    float longitude=coordinate.longitude;
    float latitude=coordinate.latitude;

    NSLog(@"dLongitude : %f",longitude);
    NSLog(@"dLatitude : %f", latitude); 
}

In the console i keep getting this:

dLongitude : 0.000000
dLatitude : 0.000000

Can you please help me there?

To get user's location even once you need to make locationManager to start updating locations (you did that) and implement delegate method that manager calls when location is retrieved - you can't get location from location manager immediately.

If you don't want to track user location - just stop updating locations in that delegate method after location was fetched for the 1st time (and store it if you need it in future).

As soon as you call [locationManager startUpdatingLocation]; your viewDidLoad method is done. You need to implement

-(void) locationManager: (CLLocationManager *)manager didUpdateToLocation: (CLLocation *) newLocation 
           fromLocation: (CLLocation *) oldLocation

and

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

which will be called by your locationManager when it gets the location, or when it fails. In both of those methods, you can call [locationManager stopUpdatingLocation].

Inside the didUpdateToLocation method, you should move all your code from viewDidLoad, starting with CLLocation *location = [locationManager location]; That's where you'll get proper values.

This worked for me

- (void)viewDidLoad {
    [super viewDidLoad];
    // locationManager update as location
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self; 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
    locationManager.distanceFilter = kCLDistanceFilterNone; 
    [locationManager startUpdatingLocation];
    [locationManager stopUpdatingLocation];
    CLLocation *location = [locationManager location];
    // Configure the new event with information from the location

    float longitude=location.coordinate.longitude;
    float latitude=location.coordinate.latitude;

    NSLog(@"dLongitude : %f", longitude);
    NSLog(@"dLatitude : %f", latitude); 
}

Try this Code

-(IBAction)Button:(id)sender

{

locationManager = [[CLLocationManager alloc] init]; 

locationManager.delegate = self;

locationManager.desiredAccuracy = kCLLocationAccuracyBest;

locationManager.distanceFilter = kCLDistanceFilterNone;

[locationManager startUpdatingLocation];

CLLocation *location = [locationManager location];

// Configure the new event with information from the location

CLLocationCoordinate2D coordinate = [location coordinate];

NSString *latitude = [NSString stringWithFormat:@"%f", coordinate.latitude];

NSString *longitude = [NSString stringWithFormat:@"%f", coordinate.longitude];

NSLog(@"dLatitude : %@", latitude);

NSLog(@"dLongitude : %@",longitude);

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, 40, 250, 50)];

UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 80, 200, 50)];

UILabel *myLabel1 = [[UILabel alloc] initWithFrame:CGRectMake(50, 120, 200, 100)];

myLabel.textColor = [UIColor blackColor];

myLabel1.textColor = [UIColor blackColor];

label.backgroundColor = [UIColor clearColor];

myLabel.backgroundColor = [UIColor clearColor];

myLabel1.backgroundColor = [UIColor clearColor];

[myLabel setText:latitude];

[myLabel1 setText:longitude];

label.text = @"Current Latitude And Longitude";

[self.view addSubview:label];

[self.view addSubview:myLabel];

[self.view addSubview:myLabel1];

}

if you are getting Lat lang both (0.00 ,0.00)

this may be solution for your ,

step 1: NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription

Add these two key in Info.plist

step 2: And than [locationManager startUpdatingLocation]; start updating

step 3: and you need to implement two mehthods

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

}

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



 CLLocation * currentLocation = [locations lastObject];

    NSLog(@"Updated Lat %f",currentLocation.coordinate.longitude);
    NSLog(@"Updated Lang %f",currentLocation.coordinate.latitude);



}

of CLLocationManagerDelegate in your ViewController interface.

**step 4:**

-(void)viewDidLoad
{
    [super viewDidLoad];
 geocoder = [[CLGeocoder alloc] init];
    manager.delegate = self;
    manager.desiredAccuracy = kCLLocationAccuracyBest;
    [manager requestWhenInUseAuthorization];
    [manager requestAlwaysAuthorization];
    [manager startUpdatingLocation];


}