Add current location on map in IOS

-(void)viewWillAppear:(BOOL)animated{

    map.mapType = MKMapTypeStandard;

    map.showsUserLocation=YES;

     NSLog(@"%f%f",self.lat_task,self.long_task);

    CLLocationCoordinate2D coord = {.latitude = self.lat_task, .longitude = self.long_task};

    MKCoordinateSpan span = {.latitudeDelta =  0.3, .longitudeDelta =  0.3};

    MKCoordinateRegion region = {coord, span};

    [map setRegion:region];

    //map.delegate=self;

     MKPlacemark *mPlacemark = [[[MKPlacemark alloc] initWithCoordinate:coord    addressDictionary:nil] autorelease];

    [map addAnnotation:mPlacemark];

  

}