如何通过GPS获取我当前所在的城市或街道

http://www.cocoachina.com/bbs/read.php?tid=54370&page=1

1. - (void)startedReverseGeoderWithLatitude:(double)latitude longitude:(double)longitude{
2.     CLLocationCoordinate2D coordinate2D;
3.     coordinate2D.longitude = longitude;
4.     coordinate2D.latitude = latitude;
6.     MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:coordinate2D];
7.     geoCoder.delegate = self;
8.     [geoCoder start];
9. }#pragma mark -
10. - (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
11. {
12. //NSString *subthroung=placemark.subThoroughfare;
13. NSString *local=placemark.locality;
14. //NSLog(@"城市名:%@-%@-%@",placemark.locality,local,subthroung);
15.     if (local) {
16.         [cityLabel setText:local];
17.     }
18. }
21. - (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
22. {
24. }