如何在iOS 4.3中处理MKReverseGeocoder/PBHTTPStatusCode = 503错误？

import CoreLocation

func reverseGeocodeLocation(location: CLLocation) {
    let geocoder = CLGeocoder()
    geocoder.reverseGeocodeLocation(location) { (placemarks, error) in
        if let error = error {
            print("Reverse geocoding failed with error: \(error.localizedDescription)")
        } else if let placemarks = placemarks {
            for placemark in placemarks {
                let name = placemark.name ?? ""
                let address = placemark.addressDictionary ?? [:]
                print("Name: \(name), Address: \(address)")
            }
        }
    }
}