在iOS中 
定位自己的当前位置，知道经纬度很简单，然后有些时候要知道地名，apple 也有了现成的api直接调用就可以（以下方法是iOS5.0以上的，现在基本都忽略了 iOS5.0以下的设备）

#pragma mark -#pragma mark CLLocationManagerDelegate - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {      CLGeocoder *geocoder=[[CLGeocoder alloc] init];    [geocoder reverseGeocodeLocation:newLocation                   completionHandler:^(NSArray *placemarks,                                       NSError *error)    {        CLPlacemark *placemark=[placemarks objectAtIndex:0];        NSLog(@"name:%@\n country:%@\n postalCode:%@\n ISOcountryCode:%@\n ocean:%@\n inlandWater:%@\n locality:%@\n subLocality:%@ \n administrativeArea:%@\n subAdministrativeArea:%@\n thoroughfare:%@\n subThoroughfare:%@\n",              placemark.name,              placemark.country,               placemark.postalCode,               placemark.ISOcountryCode,               placemark.ocean,               placemark.inlandWater,               placemark.administrativeArea,               placemark.subAdministrativeArea,              placemark.locality,               placemark.subLocality,               placemark.thoroughfare,               placemark.subThoroughfare);     }];	if (wasFound) return;    wasFound = YES;    	CLLocationCoordinate2D loc = [newLocation coordinate];		strLatitude = [NSString stringWithFormat: @"%f", loc.latitude];	strLongitude = [NSString stringWithFormat: @"%f", loc.longitude];		NSLog(@"strLatitude==%@,strLongitude==%@",strLatitude,strLongitude);	 }

 log 是：

 name:市民广场 country:中国 postalCode:(null) ISOcountryCode:CN ocean:(null) inlandWater:(null) locality:广东省 subLocality:(null)  administrativeArea:深圳市 subAdministrativeArea:福田区 thoroughfare:市民广场 subThoroughfare:(null)

第二种方法就是 我们已经知道了一个经纬度 然后反查地名：

自己写个方法：

-(void)change{    //22.540681,=114.061324    CLLocationCoordinate2D coordinate;    coordinate.latitude =  22.540681;    coordinate.longitude = 114.061324;    CLLocation *newLocation=[[CLLocation alloc]initWithLatitude:coordinate.latitude longitude: coordinate.longitude];    CLGeocoder *geocoder=[[CLGeocoder alloc] init];    [geocoder reverseGeocodeLocation:newLocation                   completionHandler:^(NSArray *placemarks,                                       NSError *error)     {         CLPlacemark *placemark=[placemarks objectAtIndex:0];         NSLog(@"我我的:%@\n country:%@\n postalCode:%@\n ISOcountryCode:%@\n ocean:%@\n inlandWater:%@\n locality:%@\n subLocality:%@ \n administrativeArea:%@\n subAdministrativeArea:%@\n thoroughfare:%@\n subThoroughfare:%@\n",               placemark.name,               placemark.country,               placemark.postalCode,               placemark.ISOcountryCode,               placemark.ocean,               placemark.inlandWater,               placemark.administrativeArea,               placemark.subAdministrativeArea,               placemark.locality,               placemark.subLocality,               placemark.thoroughfare,               placemark.subThoroughfare);     }];}

nslog 的结果和上面的一样。

iOS 根据经纬度反查 地名