How do you change the string on the alert saying:

&gt; (Appname/whatever it is) would like to use your current location

Of course, I only want to change the appname part. Because when you use the PhoneGap framework, the string is *very* ugly, something like this:

&gt; /var/mobile/Applications/157EB70D-4AA7-826E-690F0CBE0F/appname.app/www/index.html

Someone having an idea?

Location permission alert on iPhone with PhoneGap

My project worked perfectly on simulator+device,  
but now, after upgrading to **lion** os and **xcode 4.1**, I get this error when gps is active!

    server did not accept client registration 68

It&#39;s a gps based application, and i&#39;m nervous to not debug app in simulator!

Any idea to solve this issue?


----------


**UPDATE**: Gps on Simulator doesn&#39;t work also on Xcode 3.2.6 + LION.


----------

**EDIT**: Apple response on bug tracker:  

&gt; After further investigation it has
&gt; been determined that this is a known issue, which is currently being
&gt; investigated by engineering. This issue has been filed in our bug
&gt; database under the original Bug ID#.   Thank you for submitting this
&gt; bug report. We truly appreciate your assistance in helping us discover
&gt; and isolate bugs.



How to solve Xcode 4.1 (LION) GPS error?

Just a quick question on Core Location, I&#39;m trying to calculate the distance between two points, code is below:

        -(void)locationChange:(CLLocation *)newLocation:(CLLocation *)oldLocation
        {	
            
        // Configure the new event with information from the location.
            CLLocationCoordinate2D newCoordinate = [newLocation coordinate];
            CLLocationCoordinate2D oldCoordinate = [oldLocation coordinate];
            	
            CLLocationDistance kilometers = [newCoordinate distanceFromLocation:oldCoordinate] / 1000; // Error ocurring here.
            CLLocationDistance meters = [newCoordinate distanceFromLocation:oldCoordinate]; // Error ocurring here.
    }

I&#39;m getting the following error on the last two lines:

&gt; error: cannot convert to a pointer type

I&#39;ve been searching Google, but I cannot find anything.





distanceFromLocation - Calculate distance between two points

I need a way of comparing two `CLLocationCoordinate2D`&#39;s however when I tried using `==` it wouldn&#39;t work. Please can someone help me out with the best way of comparing them?

How can I compare CLLocationCoordinate2D

I&#39;m looking for a way to get a background location update every n minutes in my iOS application.  I&#39;m using iOS 4.3 and the solution should work for non-jailbroken iPhones.

I tried / considered following options:

* `CLLocationManager startUpdatingLocation/startMonitoringSignificantLocationChanges`: This works in the background as expected, based on the configured properties, but it seems not possible to force it to update the location every n minutes
* `NSTimer`: Does work when the app is running in the foreground but doesn&#39;t seem to be designed for background tasks
* Local notifications: Local notifications can be scheduled every n minutes, but it&#39;s not possible to execute some code to get the current location (without the user having to launch the app via the notification).  This approach also doesn&#39;t seem to be a clean approach as this is not what notifications should be used for.
* `UIApplication:beginBackgroundTaskWithExpirationHandler`:  As far as I understand, this should be used to finish some work in the background (also limited in time) when an app is moved to the background rather than implementing &quot;long-running&quot; background processes.

How can I implement these regular background location updates?

How do I get a background location update every n minutes in my iOS application?

My app takes the users location, gets the co-ordinates , and provides a distance to or from their destination or origin. All these possible destinations are shown in a table view, so I&#39;m getting the users co-ordinates at the same time as populating the table. The only thing is, the alert view that asks for the users location appears then disappears so quickly it&#39;s impossible to click it!

Is there any way to manually present this alert when the app first loads? I tried getting the users location when the app loads up to try and force the alert to show, but that didn&#39;t work.

Current location permission dialog disappears too quickly

How can I set the location (as it&#39;s picked up in CoreLocation services) in the iPhone Simulator? 

Set the location in iPhone Simulator

This is the section from the [CLLocationManager][1] documentation describing the app behavior with [startMonitoringSignificantLocationChanges][2]:

&gt; If you start this service and your
&gt; application is subsequently
&gt; terminated, the system automatically
&gt; relaunches the application into the
&gt; background if a new event arrives. In
&gt; such a case, the options dictionary
&gt; passed to the
&gt; application:didFinishLaunchingWithOptions:
&gt; method of your application delegate
&gt; contains the key
&gt; UIApplicationLaunchOptionsLocationKey
&gt; to indicate that your application was
&gt; launched because of a location event.
&gt; Upon relaunch, you must still
&gt; configure a location manager object
&gt; and call this method to continue
&gt; receiving location events. When you
&gt; restart location services, the current
&gt; event is delivered to your delegate
&gt; immediately. In addition, the location
&gt; property of your location manager
&gt; object is populated with the most
&gt; recent location object even before you
&gt; start location services.

So my understanding is that if your app terminates (and I assume if you don&#39;t call [stopMonitoringSignificantLocationChanges][3] from [applicationWillTerminate][4]) you will get woken up with a [UIApplicationLaunchOptionsLocationKey][5] parameter to [application:didFinishLaunchingWithOptions][6]. At that point you create your [CLLocationManager][7], call [startMonitoringSignificantLocationChanges][8] and do your background location processing for a [limited time][9].  So I am fine with this bit.

The previous paragraph only talks about what happens when the app is terminated, it doesn&#39;t suggest what you do when the application is suspended.  The documentation for [didFinishLaunchingWithOptions][10] says:

&gt; The application tracks location
&gt; updates in the background, was purged,
&gt; and has now been relaunched. In this
&gt; case, the dictionary contains a key
&gt; indicating that the application was
&gt; relaunched because of a new location
&gt; event.

Suggesting that you will only receive this call when your app is launched (because of a location change) after you have been terminated.

However the paragraph on the [Significant Change Service][11] in the [Location Awareness Programming Guide][12] has the following to say:

&gt; If you leave this service running and
&gt; your application is subsequently
&gt; suspended or terminated, the service
&gt; automatically wakes up your
&gt; application when new location data
&gt; arrives. At wake-up time, your
&gt; application is put into the background
&gt; and given a small amount of time to
&gt; process the location data. Because
&gt; your application is in the background,
&gt; it should do minimal work and avoid
&gt; any tasks (such as querying the
&gt; network) that might prevent it from
&gt; returning before the allocated time
&gt; expires. If it does not, your
&gt; application may be terminated.

This suggests you are woken up with location data if your app has been suspended, but fails to mention how you are woken up:

- Does the [UIApplicationDelegate][13] get a callback telling me that I am resuming from a suspended state into a background state?
- Does the location manager (that was freeze dried when the app was suspended) start receiving [locationManager:didUpdateToLocation:fromLocation][14] callbacks? 
- Do I just need to implement code in my [didUpdateToLocation][15] message which checks the application state and does minimal processing if in background mode? 

In the process of writing this up, I think I may have just answered my own question, but it would be great to have my understanding of this confirmed by someone more knowledgeable.


  [1]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html
  [2]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html#//apple_ref/occ/instm/CLLocationManager/startMonitoringSignificantLocationChanges
  [3]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html#//apple_ref/occ/instm/CLLocationManager/stopMonitoringSignificantLocationChanges
  [4]: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/applicationWillTerminate:
  [5]: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIApplication_Class/Reference/Reference.html#//apple_ref/c/data/UIApplicationLaunchOptionsLocationKey
  [6]: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:didFinishLaunchingWithOptions:
  [7]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html
  [8]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html#//apple_ref/occ/instm/CLLocationManager/startMonitoringSignificantLocationChanges
  [9]: http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/LocationAwarenessPG/CoreLocation/CoreLocation.html#//apple_ref/doc/uid/TP40009497-CH2-SW8
  [10]: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:didFinishLaunchingWithOptions:
  [11]: http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/LocationAwarenessPG/CoreLocation/CoreLocation.html#//apple_ref/doc/uid/TP40009497-CH2-SW8
  [12]: http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/LocationAwarenessPG/CoreLocation/CoreLocation.html
  [13]: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UIApplicationDelegate
  [14]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManagerDelegate_Protocol/CLLocationManagerDelegate/CLLocationManagerDelegate.html#//apple_ref/occ/intfm/CLLocationManagerDelegate/locationManager:didUpdateToLocation:fromLocation:
  [15]: http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CLLocationManagerDelegate_Protocol/CLLocationManagerDelegate/CLLocationManagerDelegate.html#//apple_ref/occ/intfm/CLLocationManagerDelegate/locationManager:didUpdateToLocation:fromLocation:

Behaviour for significant change location API when terminated/suspended?

I&#39;m writing an application that requires background location updates with **high accuracy and low frequency**.  The solution seems to be a background NSTimer task that starts the location manager&#39;s updates, which then immediately shuts down.  This question has been asked before:

https://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application

https://stackoverflow.com/questions/10235203/getting-user-location-every-n-minutes-after-app-goes-to-background?rq=1

https://stackoverflow.com/questions/13377750/ios-not-the-typical-background-location-tracking-timer-issue

https://stackoverflow.com/questions/15650139/ios-long-running-background-timer-with-location-background-mode

https://stackoverflow.com/questions/10706265/ios-full-time-background-service-based-on-location-tracking

but I have yet to get a **minimum example** working. After trying every permutation of the above accepted answers, I put together a starting point.  Entering background:

    - (void)applicationDidEnterBackground:(UIApplication *)application
    {
        self.bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
            NSLog(@&quot;ending background task&quot;);
            [[UIApplication sharedApplication] endBackgroundTask:self.bgTask];
            self.bgTask = UIBackgroundTaskInvalid;
        }];
    
    
        self.timer = [NSTimer scheduledTimerWithTimeInterval:60
                                                      target:self.locationManager
                                                    selector:@selector(startUpdatingLocation)
                                                    userInfo:nil
                                                     repeats:YES];
    }

and the delegate method:

    - (void)locationManager:(CLLocationManager *)manager 
        didUpdateToLocation:(CLLocation *)newLocation 
               fromLocation:(CLLocation *)oldLocation {
    
        NSLog(@&quot;%@&quot;, newLocation);

        NSLog(@&quot;background time: %f&quot;, [UIApplication sharedApplication].backgroundTimeRemaining);
        [self.locationManager stopUpdatingLocation];
    
    }

The current behavior is that the `backgroundTimeRemaining` decrements from 180 seconds to zero (while logging location), and then the expiration handler executes and no further location updates are generated.  How do I modify the above code in order to receive **periodic location updates in the background indefinitely**?

**Update**: I&#39;m targeting iOS 7 and there appears to be some evidence that background tasks behave differently:

https://stackoverflow.com/questions/18901583/start-location-manager-in-ios-7-from-background-task

Periodic iOS background location updates

How do you retrieve the user&#39;s current city name?

How to retrieve user&#39;s current city name?

I want to get the current location, but instead I get an error.

This is a snippet of my view controller.

    - (void)viewDidLoad {
    	self.locationManager = [[CLLocationManager alloc] init];
    	[locationManager setDelegate:self];
    	[locationManager setDesiredAccuracy:kCLLocationAccuracyNearestTenMeters];
    	[locationManager startUpdatingLocation];
    }
    
    - (void)locationManager:(CLLocationManager *)manager 
         didUpdateLocations:(NSArray&lt;CLLocation *&gt; *)locations {
        // I would get the latest location here
        // but this method never gets called
    }
    - (void)locationManager:(CLLocationManager *)manager 
           didFailWithError:(NSError *)error {
    	NSLog(@&quot;didFailWithError: %@&quot;, error);
    }

I&#39;m expecting the delegate method `locationManager:didUpdateLocations:` to get called, but instead, only `locationManager:didFailWithError:` gets called, and prints this:

    didFailWithError: Error Domain=kCLErrorDomain Code=0 &quot;The operation couldn’t be completed. (kCLErrorDomain error 0.)&quot; 

didFailWithError: Error Domain=kCLErrorDomain Code=0 &quot;The operation couldn’t be completed. (kCLErrorDomain error 0.)&quot;

I have an application with an explicit user interaction that makes use of the user&#39;s current location. If the user denies access to location services, I would still like subsequent uses to prompt the user to go to settings and re-enable location services for my app.

The behavior I want is that of the built-in Maps app:

1. Reset location warnings in Settings &gt; General &gt; Reset &gt; Reset Location Warnings.
1. Start Maps app.
1. Tap Current Location button in lower left corner.
1. Maps prompts with &quot;&quot;Maps&quot; Would Like to Use Your Current Location&quot; | &quot;Don&#39;t Allow&quot; | &quot;Allow&quot;.
1. Choose &quot;Don&#39;t Allow&quot; option.
1. Tap Current Location button in lower left corner again.
1. Maps prompts with &quot;Turn On Location Services to Allow &quot;Maps&quot; to Determine Your Location&quot; | &quot;Settings&quot; | &quot;Cancel&quot;.

In my own app, the same basic flow results in my CLLocationManagerDelegate -locationManager:didFailWithError: method being called with a kCLErrorDenied error at the final step and the user is not given the option to open the Settings app to correct it.

I could display my own alert in response to the error, but it would not have the ability to launch the Settings app like the alert that the OS can provide as used by the built-in Maps app.

Is there something in the CLLocationManager class I am missing that would be able to give me this behavior?

How can I prompt the user to turn on location services after user has denied their use

Is there a way to manually tell the device to dispatch a significant location change notification that will wake up any applications registered for this notification? 
This is for testing only, and I realize this private API call would get rejected upon submission to the app store.


Xcode / iOS simulator: Trigger significant location change manually

I need to get the country location of a iOS device.

I&#39;ve been trying to use CoreLocation with MKReverseGeocoder. However this seems to return erraneous quite frequently. And I only need the country, no need for streets and such.

How can this be done in a more stable way?

Get device location (only country) in iOS

I am trying to fetch user location in my iOS app. I have included corelocation framework in my project first. Then on a button click I am invoking the core location api as below. When I am trying to install this in a device, the core location never asks the user permission. When I try to fetch the location on button click, I am getting kCLAuthorizationStatusNotDetermined as the authorisationStatus. Please help me in this. I have no clue what is happening.

    - (IBAction)fetchLessAccurateLocation:(id)sender {
        [self.txtLocation setText:@&quot;&quot;];
        
        locationManager = [[CLLocationManager alloc] init];
        locationManager.delegate = self;
        locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
        locationManager.distanceFilter = 1000;
        
        if ([self shouldFetchUserLocation]) {
            [locationManager startUpdatingLocation];
        }
    }

This is my shouldFetchUserLocation method:

    -(BOOL)shouldFetchUserLocation{
        
        BOOL shouldFetchLocation= NO;
        
        if ([CLLocationManager locationServicesEnabled]) {
            switch ([CLLocationManager authorizationStatus]) {
                case kCLAuthorizationStatusAuthorized:
                    shouldFetchLocation= YES;
                    break;
                case kCLAuthorizationStatusDenied:
                {
                    UIAlertView *alert= [[UIAlertView alloc]initWithTitle:@&quot;Error&quot; message:@&quot;App level settings has been denied&quot; delegate:nil cancelButtonTitle:@&quot;Ok&quot; otherButtonTitles: nil];
                    [alert show];
                    alert= nil;
                }
                    break;
                case kCLAuthorizationStatusNotDetermined:
                {
                    UIAlertView *alert= [[UIAlertView alloc]initWithTitle:@&quot;Error&quot; message:@&quot;The user is yet to provide the permission&quot; delegate:nil cancelButtonTitle:@&quot;Ok&quot; otherButtonTitles: nil];
                    [alert show];
                    alert= nil;
                }
                    break;
                case kCLAuthorizationStatusRestricted:
                {
                    UIAlertView *alert= [[UIAlertView alloc]initWithTitle:@&quot;Error&quot; message:@&quot;The app is recstricted from using location services.&quot; delegate:nil cancelButtonTitle:@&quot;Ok&quot; otherButtonTitles: nil];
                    [alert show];
                    alert= nil;
                }
                    break;
                    
                default:
                    break;
            }
        }
        else{
            UIAlertView *alert= [[UIAlertView alloc]initWithTitle:@&quot;Error&quot; message:@&quot;The location services seems to be disabled from the settings.&quot; delegate:nil cancelButtonTitle:@&quot;Ok&quot; otherButtonTitles: nil];
            [alert show];
            alert= nil;
        }
    
        return shouldFetchLocation;
    }

Here is my core location delegate method:

    - (void)locationManager:(CLLocationManager *)manager
        didUpdateLocations:(NSArray *)locations __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_6_0){
        
        NSLog(@&quot;location fetched in delegate&quot;);
        
        CLLocation* location = [locations lastObject];
        NSDate* eventDate = location.timestamp;
        NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
        
        if (abs(howRecent) &lt; 15.0) {
            // If the event is recent, do something with it.
            NSLog(@&quot;inside loop.... latitude %+.6f, longitude %+.6f\n&quot;,
                  location.coordinate.latitude,
                  location.coordinate.longitude);
        }
        NSLog(@&quot;latitude %+.6f, longitude %+.6f\n&quot;,
              location.coordinate.latitude,
              location.coordinate.longitude);
        [self.txtLocation setText:[NSString stringWithFormat:@&quot;\nlatitude: %+.6f \nlongitude:   %+.6f&quot;, location.coordinate.latitude, location.coordinate.longitude]];
        
        [locationManager stopUpdatingLocation];
        [locationManager stopMonitoringSignificantLocationChanges];
        
        if(locationManager!=nil){
            locationManager.delegate= nil;
            locationManager= nil;
        }
    }



iOS: App is not asking user&#39;s permission while installing the app. getting kCLAuthorizationStatusNotDetermined every time - Objective-c &amp; Swift

With the release of iOS6 Apple wants us to use didUpdateLocations instead of didUpdateToLocation. Can anyone explain how to properly use didUpdateLocations?

didUpdateLocations instead of didUpdateToLocation

I have two ways of getting the magnetic fields (strength, x, y, and z) using the iOS device&#39;s magnetometer.  
  
1) Core Location  
Used the CLHeading from `CLLocationManagerDelegate` method `locationManager:didUpdateHeading:`. This is similar to Apple&#39;s Teslameter sample app.  
  
2) Core Motion  
Used `CMMagneticField` from `CMMotionManager`&#39;s `magnetometerData.magneticField`.  
  
Questions:  
a) What is the difference between the two? I am getting different values from both. I was expecting that they will return the same values.  
The difference is most notable when I start the app from a resting position (face up in a table), and then lift the device up in to the air.  
b) If there is a difference, when should I use the magnetic field from Core Location heading, and when should I use the magnetic field from Core Motion?
  
Note: I also am not sure if the &quot;magnetic field&quot; of Core Location and Core Motion refer to different magnetic field concepts.  
Note: I computed strength as the square root of (x^2 + y^2 + z^2) for both approaches.

In iOS, what is the difference between the Magnetic Field values from the Core Location and Core Motion frameworks?

I&#39;m using `CoreLocation` framework in my app in Xcode7(pre-released),and I noticed that there is a newly added property called `allowsBackgroundLocationUpdates` in `CLLocationManager` class.

What&#39;s the relationship between this property and the location updates in the Background Modes of the Capabilities tab. What&#39;s the default value of it and does it affect apps running in iOS9?

All Core Location Solutions on Gang of Coders

Total of 18 Core Location Solutions