CLLocation Manager startUpdatingLocation not starting

Question

I have been following this tutorial http://www.devfright.com/ios-6-core-location-tutorial/ to add location services to my ios app. I have imported the Corelocation in my TestFileViewController.h file like so:

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

 @interface TestFileViewController : UIViewController <UITableViewDelegate,UITableViewDataSource, NSStreamDelegate>

 @property (nonatomic, strong) CLLocationManager *locationManager;

 @end

and then in the testFileViewController.m ViewDidLoad I added (remembering to implement the CLLocationManagerDelegate):

//start checking for location from CoreLocation Framework (currently not working)
if ([CLLocationManager locationServicesEnabled])
{
    NSLog(@"location services enabled");
    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    _locationManager.delegate = self;
    [_locationManager startUpdatingLocation];
};

}

(conditional CLLocationManager executes true and NSLogs) and then right below ViewDidLoad:

    //fail to find location, handle error
    - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError         *)error
     {
      NSLog(@"didFailWithError: %@", error);
      UIAlertView *errorAlert = [[UIAlertView alloc]
                           initWithTitle:@"Error" message:@"Failed to Get Your Location"    delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
       [errorAlert show];
      }

      //show found location, return NSLOG for proof
      - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:            (CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
      {
      NSLog(@"Made it to location Manager");
      CLLocation *location = [locationManager location];

      CLLocationCoordinate2D coordinate = [location coordinate];

      NSLog(@"%f",coordinate.latitude);
      }

I added the NSLogs just as markers to determine from the console whether or not the functions were being called at all, however neither didFailWithError nor didUpdateToLocation are called.

Yes I know that didUpdateToLocation is deprecated/outdated, and I replaced it with didUpdateLocations and it still did not work so I changed it back.

How can I get my my locationManager to start updating the current location and return coordinate values in the form of strings to be used later in my app? Thanks.

hackerinheels hackerinheels · Accepted Answer · 2014-07-10T21:35:44

Make your class a delegate for CLLocationManagerDelegate.

@interface TestFileViewController : UIViewController <UITableViewDelegate,UITableViewDataSource, NSStreamDelegate, **CLLocationManagerDelegate**>

And then set the delegate to self.

I would also recommend creating a separate class to handle location. Cleaner design.

Also ensure that you are calling startUpdatingLocation on the main thread.

dispatch_sync(dispatch_get_main_queue(), ^{ 

});

CLLocation Manager startUpdatingLocation not starting

2 Answers