MKMapView doesn't scroll and doesn't not zoom

Question

I have a MapView and marked where the user's location and nearby there are other annotationView of various types regarding tourist attractions. I want the MapView is scrollable and zoomable to see all annotationView of the city, but when I move the MapView returns immediately centered shooting, ugly looking.

this is the code in MapViewController.m

 - (void)viewDidLoad{

        //.....

   self.mapView.zoomEnabled=YES;
   self.mapView.scrollEnabled = YES;

      //......
  }


 - (void) locationManager:(CLLocationManager *) manager
 didUpdateToLocation:(CLLocation *) newLocation
        fromLocation:(CLLocation *) oldLocation {

      //......
  self.coordinate = CLLocationCoordinate2DMake(self.latitudine, self.longitudine);
  CLLocationCoordinate2D min = CLLocationCoordinate2DMake(self.coordinate.latitude -0.005,
       self.coordinate.longitude-0.005);

 CLLocationCoordinate2D max = CLLocationCoordinate2DMake(self.coordinate.latitude+0.005,
       self.coordinate.longitude+0.005);

 CLLocationCoordinate2D center = CLLocationCoordinate2DMake((max.latitude + min.latitude)
       / 2.0, (max.longitude + min.longitude) / 2.0);
 MKCoordinateSpan span = MKCoordinateSpanMake(max.latitude - min.latitude, max.longitude -
      min.longitude);
 MKCoordinateRegion region = MKCoordinateRegionMake(center, span);

 self.mapView.region= region;

  [mapView setRegion:region animated:TRUE];

     //......

 }

I don't think this is the problem, but [mapView setRegion:region animated:TRUE]; is wrong, it should be [mapView setRegion:region animated:YES]; — jcesarmobile, Nov 07 '12 at 09:54
@jcesar There is no difference in passing TRUE or YES. It won't matter at all as they are same. — Evol Gate, Nov 07 '12 at 09:57
@ConicaDegenere Check whether you are doing something in the touchesBegan/ end method. — Evol Gate, Nov 07 '12 at 09:58
I do not have the touchesBegan method which should be placed? — Ortensia C., Nov 07 '12 at 10:02

score 2 · Accepted Answer · answered Nov 07 '12 at 11:13

I think it is because the update is getting called constantly, so it will center the screen all the time with your mapview setregion bit.

When you declared your locationManager bet sure to set the sensitivity.

self.locationManager.distanceFilter = 10.0f;

This will only call the update if it changes more than 10 meters.

score 0 · Answer 2 · answered Nov 07 '12 at 19:53

Everytime the device notices it has changed location, you are zooming the map to self.latitudine and self.longitudine. In the code you have shown you are not setting those values to anything new. Do you mean to be zooming in on the newLocation coordinates?

MKMapView doesn't scroll and doesn't not zoom

2 Answers2