I'm implement MKMapView and works fine when the user loads the app for the very first time but after that it doesn't refresh the user locations even when the user comes back from background.

This part of my code:

```
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.mapView.delegate=self;
    self.mapView.zoomEnabled = YES;
    self.mapView.userTrackingMode = MKUserTrackingModeFollow;
    self.mapView.zoomEnabled = YES;
    self.mapView.showsUserLocation = YES;
}

```

I tried implement the code above in viewWillAppear to see if it will reload every time the user loads the app but it didn't work.

any of you knows of has any idea of how can reload the mapview everytime the app loads?

I'll really appreciate your help.