Cllocationmanager Delegate Methods Are Not Getting Called(Google Maps Is Integrated)

CLLocationManager delegate methods are not getting called(google maps is integrated)

From your code you are working with Swift 3, and in Swift 3 CLLocationManagerDelegate method's signature is changed like this.

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {

}

//func locationManager(_ manager: CLLocationManager, didUpdateTo newLocation: CLLocation, 
       from oldLocation: CLLocation) is deprecated with below one
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

}

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {

}

Check Apple Documentation on CLLocationManagerDelegate for more details.

CLLocationManager delegate not called in ios 10 swift 3 simulator]

Did you change the location after starting application? In menu: Debug / Location / ...
Or change the default location (on your last screenshot)

Google Maps: custom LocationSource in iOS

There is a solution. Google Maps API uses the Cocoa framework class CLLocationManager. Everyone how would like to be informed about current GPS location changes must conform to CLLocationManagerDelegate and be a delegate of the CLLocationManager object. The updates are being sent to the delegate object through the
locationManager:didUpdateLocations: delegate method.
This is a theory everyone knows about. So in order to simulate location data we need to find a way to invoke this method passing our own data to it.
Fortunately there is an opportunity to dynamically change the behaviour of any class, via the functions class_addMethod and class_replaceMethod. So now we can change the implementation of a method abc with a method override_abc which can be implemented in a category like so:

let originalSelector = NSSelectorFromString("setDelegate:")
let newSelector = NSSelectorFromString("override_setDelegate:")

let originalMethod = class_getInstanceMethod(CLLocationManager.self, originalSelector)
let newMethod = class_getInstanceMethod(CLLocationManager.self, newSelector)

method_exchangeImplementations(originalMethod, newMethod)

For our case, we need to change the setter for the location managers delegate and add our own setter as an extension:

extension CLLocationManager {
    func override_setDelegate(delegate: CLLocationManagerDelegate) {
        // save a reference to self
        GMLocationManager = self
        override_setDelegate(delegate)
    }
}

Once we have saved a reference to the Google Maps location manager we can now call locationManager:didUpdateLocations: delegate method using an additional extension method simulateLocation.

extension CLLocationManager {
    func simulateLocation(location: CLLocation) {
        self.delegate?.locationManager?(self, didUpdateLocations: [location])
    }
}
// ...

GMLocationManager?.simulateLocation(fakeLocation)

UIWebView and Google Maps

Step-1

Add these two properties in info.plist

NSLocationAlwaysUsageDescription and below property

Step-2

on your view controller call delegate method

  #import <CoreLocation/CoreLocation.h>

@interface ViewController : UIViewController <CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
}

@property (strong, nonatomic) NSString *longitude;
@property (strong, nonatomic) NSString *latitude;

Step-3

on your Implementation File on your `viewDidLoad`

   - (void)viewDidLoad
 {
     [super viewDidLoad];

    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
    {
        [locationManager requestWhenInUseAuthorization];
    }
    [locationManager startUpdatingLocation];

    }

Step-4

 -(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
UIAlertView *errorAlert = [[UIAlertView alloc]initWithTitle:@"Error" message:@"There was an error retrieving your location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[errorAlert show];
NSLog(@"Error: %@",error.description);
}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
  {
CLLocation *crnLoc = [locations lastObject];
latitude= [NSString stringWithFormat:@"%.8f",crnLoc.coordinate.latitude];
longitude = [NSString stringWithFormat:@"%.8f",crnLoc.coordinate.longitude];

}

for sample see this and this

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