iOS 硬件 地图-基础-自定义追踪

• (void)mapView:(MKMapView )mapView didUpdateUserLocation:(MKUserLocation )userLocation{

  userLocation.title = @”我的位置”;

  userLocation.subtitle = @”my location”;

  //设置中心
  [self.mapView setCenterCoordinate:userLocation.location.coordinate animated:YES];

  //设置范围
  /*
  typedef struct {
  CLLocationCoordinate2D center;
  MKCoordinateSpan span;
  } MKCoordinateRegion;
  */

  /*
  typedef struct {
  CLLocationDegrees latitudeDelta;
  CLLocationDegrees longitudeDelta;
  } MKCoordinateSpan;
  */

  MKCoordinateSpan span = MKCoordinateSpanMake(0.735144, 0.546570);

  MKCoordinateRegion region = MKCoordinateRegionMake(userLocation.location.coordinate, span);

  [self.mapView setRegion:region animated:YES];

}

//==================求出 经纬度的跨度

• (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{

  NSLog(@”%f”,self.mapView.region.span.latitudeDelta);

  NSLog(@”%f”,self.mapView.region.span.longitudeDelta);
  }