IOS GPS（定位城市）

a.使用CoreLocation 定位得到经度和纬度

b.在-(void)locationManager:(CLLocationManager )manager didUpdateToLocation:(CLLocation )newLocation代理方法中使用CLGeocoder的reverseGeocodeLocation: :方法解析

c.在b中解析方法的完成回掉块completionHandler:^(NSArray *placemarks, NSError *error)中得到Country(国家) State(城市) SubLocality(区)

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

[locationManager stopUpdatingLocation];
NSLog(@"location ok");

CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark * placemark in placemarks) {

NSDictionary *test = [placemark addressDictionary];
//  Country(国家)  State(省)  SubLocality(区)城市需要用place mark.locality获得
NSLog(@"%@", [test objectForKey:@"State"]);
}
}];
}