CODEWITHSUNDEEP
iosobjective-ccllocationmanager
MSU_Bulldog
MSU_Bulldog

Reputation: 3519

iOS: Track user location

I've used location services in many apps, but this new app has a problem on iOS 8.0 and up. I am not getting the notification on the app's first load prompting to allow location services. However, on my iOS 7.1 device I get the prompt.

Here is what I have in my appDelegate in didFinishLaunchingWithOptions:

self.locationManager = [CLLocationManager new];
[self.locationManager setDelegate:self];
if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
    [self.locationManager requestAlwaysAuthorization];
}

[self initializeRegionMonitoring];

And the initializeRegionMonitoring method is:

-(void) initializeRegionMonitoring {

NSLog(@"initialize region monitoring");

self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;

// radius of region being monitored
CLLocationDistance radius = 25; // 20 metre sensitivity
CLLocationCoordinate2D coordinate;
coordinate.latitude = 25.886099;
coordinate.longitude = -80.165124;

self.someRegion = [[CLCircularRegion alloc] initWithCenter:coordinate radius:radius identifier:@"Qualex"];
self.someRegion.notifyOnEntry = YES;
self.someRegion.notifyOnExit = YES;
[self.locationManager startMonitoringForRegion:self.someRegion];

// notify changes when the device has moved x meters
self.locationManager.distanceFilter = 20; // or set to 20 meters
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
self.locationManager.activityType = CLActivityTypeAutomotiveNavigation;
[self.locationManager startUpdatingLocation];
[self.locationManager startMonitoringSignificantLocationChanges];
}

I also have set the NSLocationAlwaysUsageDescription in my info.plist, so there must be something I've forgotten, right? Thanks for the help!

Edit:

I'm also registering for remote notifications at the same time, that's never been a problem before but I thought it might be some useful extra information.

Also, when terminated the app then re-run the notification to allow location services pops up, but goes away instantly. Just flashes on the screen. I have no idea why it would dismiss without clicking one of the options on the alert.

Upvotes: 3

Views: 469

Answers (1)

n00neimp0rtant
n00neimp0rtant

Reputation: 915

Before iOS 8, you could request location permission simply by instantiating a CLLocationManager object and attempting to start location tracking. On iOS 8 and above, this does not present a permission prompt; you must request authorization manually with either the requestAlwaysAuthorization or requestWhenInUseAuthorization methods.

That being said, on iOS 8, if you call either of those methods, then the CLLocationManager instance on which you called it is released, the location permission prompt will dismiss itself. What's happening here is that you are creating a location manager, requesting permission (iOS starts to try to present the permission dialog), calling initializeRegionMonitoring, and setting the self.locationManager property to a new location manager instance. This causes the first one you created to get released by ARC, so the permission prompt is dismissed before it even gets a chance to appear.

Removing the line self.locationManager = [[CLLocationManager alloc] init]; in your initializeRegionMonitoring method should fix the issue.

Upvotes: 2

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