setcentercoordinate不会允许放大和缩小在IOS 7

Question

同样的方法在IOS工作正常6 我使用didUpdateToLocation方法及其实现如下： -

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation  *)Location fromLocation:(CLLocation *)oldLocation 
{ 
if(appDelegate->mapView) 
{ 
    if(Span) 
    {   
     [appDelegate->mapView setRegion:MKCoordinateRegionMake(Location.coordinate, MKCoordinateSpanMake(0.01f, 0.01f)) animated:YES]; 

     Span = NO; 
    } 
    else 
    { 
     [appDelegate->mapView setCenterCoordinate:Location.coordinate animated:YES]; 
    } 
} 

}

请建议应该做些什么以便跟踪用户的位置，并且用户还应该能够在地图上放大和缩小。地图还应该围绕当前的GPS位置。

Answer 1

我用这个缩放地图加载时的用户位置。

- (void)mapViewDidFinishLoadingMap:(MKMapView *)mapView { 
    NSLog(@"mapViewDidFinishLoadingMap"); 

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 2 * NSEC_PER_SEC), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 
     [self zoomMapView:mapView ToUserLocation:mapView.userLocation.coordinate]; 
    }); } 


-(void)zoomMapView:(MKMapView*)mapView ToUserLocation:(CLLocationCoordinate2D)coordinate { 

    if (!isZoomed) { 
     isZoomed=TRUE; 
    MKCoordinateRegion region = mapView.region; 
    MKCoordinateSpan span; 

    region.center = coordinate; 
    span.latitudeDelta = 0.02; 
    span.longitudeDelta = 0.02; 
    region.span=span; 

    [mapView setMapType:MKMapTypeStandard]; 
    [mapView setZoomEnabled:YES]; 
    [mapView setScrollEnabled:YES]; 
    [mapView setShowsUserLocation:YES]; 
    [mapView setRegion:region animated:YES]; 
    } } 

，每当你想缩放用户当前的位置，你可以调用-(void)zoomMapView:(MKMapView*)mapView ToUserLocation:(CLLocationCoordinate2D)coordinate方法。