系統自帶的方法：

//根據經緯度解析成位置  

1.    CLGeocoder *geocoder=[[[CLGeocoder alloc]init]autorelease];  
2.    [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemark,NSError *error)  
3.     {  
4.         CLPlacemark *mark=[placemark objectAtIndex:0];  
5.         [email protected]"沒有當前位置的詳細資訊";  
6.         [email protected]"詳細資訊請點選‘附近’檢視";  
7.         place.title=[NSString stringWithFormat:@"%@%@%@",mark.subLocality,mark.thoroughfare,mark.subThoroughfare];  
8.         place.subTitle=[NSString stringWithFormat:@"%@",mark.name];//獲取subtitle的資訊  
9.         [self.myMapView selectAnnotation:place animated:YES];  
10.     } ];  

// 百度地圖反編譯

-(void)mapViewWillStartLocatingUser:(BMKMapView *)mapView{
NSLog(@"開始定位");
}

/**
 *使用者位置更新後，會呼叫此函式
 *@param mapView 地圖View
 *@param userLocation 新的使用者位置
 */
-(void)mapView:(BMKMapView *)mapView didUpdateUserLocation:(BMKUserLocation *)userLocation{
NSLog(@"latitude--%f,longtitude---%f
 
",userLocation.location.coordinate.latitude,userLocation.location.coordinate.longitude);
locaLatitude=userLocation.location.coordinate.latitude;//緯度
locaLongitude=userLocation.location.coordinate.longitude;//精度
BMKCoordinateRegion region;
//將定位的點居中顯示
region.center.latitude=locaLatitude;
region.center.longitude=locaLongitude;

   //反地理編碼出地理位置
CLLocationCoordinate2D pt=(CLLocationCoordinate2D){0,0};
pt=(CLLocationCoordinate2D){locaLatitude,locaLongitude};

BOOL flag=[_search reverseGeocode:pt];
if (flag) {
myMapView.showsUserLocation=NO;//不顯示自己的位置
self.btnDone.enabled=YES;
}


//當前位置標註和地圖的比例（註釋為可不用）//	BMKCoordinateSpan spans;//	spans.latitudeDelta=0.01;//	spans.longitudeDelta=0.01;//	region.span=spans;
myMapView.region=region;
}

在使用  [_search reverseGeocode:pt] 的時候，會呼叫它的一個協議方法，也就是下面的方法： 

//反地理編碼
-(void)onGetAddrResult:(BMKAddrInfo *)result errorCode:(int)error{
if (error==0) {
BMKPointAnnotation *item=[[BMKPointAnnotation alloc] init];
item.coordinate=result.geoPt;//地理座標
item.title=result.strAddr;//地理名稱
[myMapView addAnnotation:item];
myMapView.centerCoordinate=result.geoPt;

self.lalAddress.text=[result.strAddr stringByReplacingOccurrencesOfString:@"-" withString:@""];
if (![self.lalAddress.text isEqualToString:@""]) {
strProvince=result.addressComponent.province;//省份
strCity=result.addressComponent.city;//城市
strDistrict=result.addressComponent.district;//地區
}
//		CLGeocoder *geocoder=[[CLGeocoder alloc] init];//		CLGeocodeCompletionHandler handle=^(NSArray *palce,NSError *error){//			for (CLPlacemark *placemark in palce) {//				NSLog(@"%@1-%@2-%@3-%@4-%@5-%@6-%@7-%@8-%@9-%@10-%@11-%@12",placemark.name,placemark.thoroughfare,placemark.subThoroughfare,placemark.locality,placemark.subLocality,placemark.administrativeArea,placemark.postalCode,placemark.ISOcountryCode,placemark.country,placemark.inlandWater,placemark.ocean,placemark.areasOfInterest);//				break;//			}//		};//		CLLocation *loc = [[CLLocation alloc] initWithLatitude:locaLatitude longitude:locaLongitude];//		[geocoder reverseGeocodeLocation:loc completionHandler:handle];
}
}