How to search MKMapView with UISearchBar?

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This maybe the easiest method. It uses apple servers for geocoding. Sometimes the apple servers provide better response than google. And soon (in IOS 6.1) the google maps will be completely out of IOS. So it is good if the app stays inside the apples provided features.

-(void)searchBarSearchButtonClicked:(UISearchBar *)theSearchBar
{
    [theSearchBar resignFirstResponder];
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder geocodeAddressString:theSearchBar.text completionHandler:^(NSArray *placemarks, NSError *error) {
        //Error checking

        CLPlacemark *placemark = [placemarks objectAtIndex:0];
        MKCoordinateRegion region;
        region.center.latitude = placemark.region.center.latitude;
        region.center.longitude = placemark.region.center.longitude;
        MKCoordinateSpan span;
        double radius = placemark.region.radius / 1000; // convert to km

        NSLog(@"[searchBarSearchButtonClicked] Radius is %f", radius);
        span.latitudeDelta = radius / 112.0;

        region.span = span;

        [theMapView setRegion:region animated:YES];
    }];
}

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