iPhone-中心地图，直到完全准确为止

如何解决iPhone-中心地图，直到完全准确为止

| 我正在制作一个应用程序，打开它时，我开始获取用户位置并将地图居中放置在用户位置：

    locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    [locationManager startUpdatingLocation];

那我有

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

    location = newLocation.coordinate;

    if (isopening) {

        //Center location and set zoom on user when opening the app
        MKCoordinateRegion region;
        region.center = location;

        //Set Zoom level using Span
        MKCoordinateSpan span;
        span.latitudeDelta = .005;
        span.longitudeDelta = .005;
        region.span = span;

        isopening = NO;

        [mapView setRegion:region animated:TRUE]; 
    }


}

使用isopening标志，地图会在获得完全准确性之前停止居中，但如果我未设置标志，则地图将一遍又一遍地居中。有没有一种方法可以获取位置并完全准确地对中地图，然后停止对中？     

解决方法

这是我的方法：

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation {
    NSTimeInterval locationAge = -[userLocation.location.timestamp timeIntervalSinceNow];
    if (locationAge > 5.0) return;
    if (userLocation.location.horizontalAccuracy < 0) return;

    CLLocation *location = userLocation.location;
    static BOOL found = NO;
    if (location && !found) {
        MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(location.coordinate,1000,1000);
        [ridesMap setRegion:region animated:YES];
        found = YES;
    }//end if

}//end