How to perform action when user click on myLocation button in Objective C?

Question

I am new in iOS and I am facing problem regarding to get the information of current city of user and I also need user current latitude and longitude when I click on mycurrenLocation button.

As in the image when I click on this current location button I need the information of current latitude and longitude and also the name of current city. Is it is possible? If yes the how to do this?

Thanks in advance!

Start from here : https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/LocationAwarenessPG/CoreLocation/CoreLocation.html after getting latitude and longitude use `reverseGeoCoding` to get information about location like, city. — Sunny, Mar 01 '17 at 12:53

Anbu.Karthik · Accepted Answer · 2017-03-01T13:30:55.073

3

if you tapped the My location button the following delegate method will call

(BOOL) didTapMyLocationButtonForMapView: (GMSMapView *) mapView

and you get the output as

And you can get location by

(lldb) po mapView.myLocation
<+37.33243033,-122.03088128> +/- 386.93m (speed -1.00 mps / course -1.00) @ 5/19/14, 6:22:28 PM Moscow Standard Time

edited Mar 01 '17 at 13:30

answered Mar 01 '17 at 13:24

Anbu.Karthik

82,064
23
174
143

How can I get latitude and longitude. – Muju Mar 02 '17 at 06:08
2

@Muju - mapView.myLocation.coordinate.latitude or try with mapView.myLocation.latitude – Anbu.Karthik Mar 02 '17 at 06:15
@Anbu.Karhik Thank you. – Muju Mar 02 '17 at 06:32
@Muju - which one u used – Anbu.Karthik Mar 02 '17 at 06:33
@Anub.karthik didTapMyLocationButtonForMapView method and your comment line. – Muju Mar 02 '17 at 06:34
@Muju - no no I am not asked that `mapView.myLocation.coordinate.latitude or try with mapView.myLocation.latitude` which one u used – Anbu.Karthik Mar 02 '17 at 06:35
mapView.myLocation.coordinate.latitude – Muju Mar 02 '17 at 06:39
But it is not working on iPad in simulator it work but on real device it not work. – Muju Mar 02 '17 at 06:40
are you enabled the `gmsmapviewdelegate` in yur current class – Anbu.Karthik Mar 02 '17 at 06:42

score 0 · Answer 2 · edited May 23 '17 at 12:17

0

You can use CoreLocation to get the longitude and latitude.

#import <CoreLocation/CoreLocation.h>

CLLocationManager *locationManager;
- (void)viewDidLoad
{
    locationManager = [[CLLocationManager alloc] init];
    locationManager.distanceFilter = kCLDistanceFilterNone; 
    locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
    [locationManager startUpdatingLocation];
}

Then

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

And pass the lattitude and logitude into google location api you will get the street name.

Also check This link:

Google current location API

Stackoverflow answer

edited May 23 '17 at 12:17

Community

1
1

answered Mar 01 '17 at 12:55

Sharat Kannan

90
2
9

Check this: http://stackoverflow.com/questions/12736086/how-to-get-location-latitude-longitude-value-in-variable-on-ios – Sharat Kannan Mar 01 '17 at 12:56
How can I get city Name. – Muju Mar 01 '17 at 13:07
With the help of google API: https://developers.google.com/maps/documentation/ios-sdk/reference/interface_g_m_s_address – Sharat Kannan Mar 01 '17 at 13:12
Also refer this link: http://stackoverflow.com/questions/10515639/iphone-get-city-name-from-latitude-and-longtiude – Sharat Kannan Mar 01 '17 at 13:14

score 0 · Answer 3 · answered Mar 01 '17 at 13:01

You can get location from didUpdateToLocation is called and then use geocoding method to get location

// this delegate is called when location is found
- (void)locationManager:(CLLocationManager *)manager     didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation 
{
  // an MKReverseGeocoder is created to find a placemark  coordinates
    MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
   geoCoder.delegate = self;
   [geoCoder start];
}

// this delegate is called to convert into placemakrk
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
 {
   MKPlacemark * myPlacemark = placemark;
   // we are now retrieving the city name
    NSString *city = [myPlacemark.addressDictionary objectForKey:  (NSString*) kABPersonAddressCityKey];
   }

score 0 · Answer 4 · answered Mar 01 '17 at 13:20

check this code

Import CoreLocation framework in .h File

#import <CoreLocation/CoreLocation.h>

.m file

  @interface yourViewController : UIViewController<CLLocationManagerDelegate>
    {
        CLLocationManager *locationManager;
        CLLocation *currentLocation;
    }



- (void)viewDidLoad
{
    [super viewDidLoad];
    [self currentlocation]; 
}


-(void)currentlocation
{

    locationManager = [CLLocationManager new];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager startUpdatingLocation];

}

Step 5: Get location using this method

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    currentLocation = [locations objectAtIndex:0];
    [locationManager stopUpdatingLocation];
    CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error)
     {
         if (!(error))
         {
             CLPlacemark *placemark = [placemarks objectAtIndex:0];
             NSLog(@"\nCurrent Location Detected\n");
             NSLog(@"placemark %@",placemark);
             NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
             NSString *Address = [[NSString alloc]initWithString:locatedAt];
             NSString *Area = [[NSString alloc]initWithString:placemark.locality];
             NSString *Country = [[NSString alloc]initWithString:placemark.country];
             NSString *CountryArea = [NSString stringWithFormat:@"%@, %@", Area,Country];
             NSLog(@"%@",CountryArea);
         }
         else
         {
             NSLog(@"Geocode failed with error %@", error);
             NSLog(@"\nCurrent Location Not Detected\n");
             //return;
             CountryArea = NULL;
         }
         /*---- For more results 
         placemark.region);
         placemark.country);
         placemark.locality); 
         placemark.name);
         placemark.ocean);
         placemark.postalCode);
         placemark.subLocality);
         placemark.location);
          ------*/
     }];
}

How to perform action when user click on myLocation button in Objective C?

4 Answers4