how to get current location in google map sdk in iphone - iphone

Question

I want to set camera on current location and zoom level upto 10.
So I have written code like this and for current location i get hint from this post.
How to use delegates in Google map API for IOS 6
here is my code
mapView_=[[GMSMapView alloc]initWithFrame:CGRectZero];
CLLocationCoordinate2D currentPosition = mapView_.myLocation.coordinate;
GMSCameraPosition* camera =
[GMSCameraPosition cameraWithTarget: currentPosition zoom: 10];
mapView_.camera = camera;
mapView_.delegate=self;
mapView_.mapType = kGMSTypeSatellite;
mapView_.myLocationEnabled = YES;
self.view = mapView_;
mapView_.settings.myLocationButton = YES;
But coordinate is 0.00 in device.
Please Any Can help to solve out this issue?

Answer 1

Try this:
#property (nonatomic, retain) IBOutlet GMSMapView *googleMapView;
#property (nonatomic, retain) CLLocationManager *locationManager;
- (void)showCurrentLocation {
_googleMapView.myLocationEnabled = YES;
[self.locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:newLocation.coordinate.latitude
longitude:newLocation.coordinate.longitude
zoom:17.0];
[_googleMapView animateToCameraPosition:camera];
//...
}

Answer 2

You can add an observer for the myLocation property as follows:
[self.mapView addObserver:self
forKeyPath:#"myLocation"
options:(NSKeyValueObservingOptionNew |
NSKeyValueObservingOptionOld)
context:NULL];
You should then implement the following method:
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context {
if ([keyPath isEqualToString:#"myLocation"]) {
NSLog(#"My position changed");
}
}

Answer 3

write this line in info plist
CLLocationManager requestAlwaysAuthorization (string) abcd
//code and also set annotation pin
.h
#import<MapKit/Mapkit.h>
CLLocationManager *locationManager;
#property(nonatomic, weak) IBOutlet MKMapView* mapView;
#property(nonatomic,retain)CLLocationManager* locationManager;
- (id)init {
self = [super init];
if(self != nil) {
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
}
return self;
}
in viewDidLoad
_mapView.showsUserLocation = YES;
_mapView.mapType = MKMapTypeStandard;
_mapView.delegate = self;
if(IS_OS_8_OR_LATER) {
[self.locationManager requestAlwaysAuthorization];
}
[self.locationManager startUpdatingLocation];
// NSDictionary *dictlatitude = [_dict objectForKey:#"latitude"];
float strlatitude = [[_dict objectForKey:#"latitude"] floatValue];
// NSDictionary *dictlongitude = [_dict objectForKey:#"longitude"];
float strlongitude = [[_dict objectForKey:#"longitude"] floatValue];
NSLog(#"Staring Point latitude : %f", strlatitude);
NSLog(#"Staring Point longitude: %f", strlongitude);
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta = 0.005;
span.longitudeDelta = 0.005;
CLLocationCoordinate2D location;
location.latitude = strlatitude;
location.longitude = strlongitude;
region.span = span;
region.center = location;
[_mapView setRegion:region animated:YES];
MyAnnotation *ann = [[MyAnnotation alloc] init];
ann.title=#"name of the pin";
ann.coordinate = region.center;
[_mapView addAnnotation:ann];