请问高德地图逆地理编码结果没有数据，是什么问题？

今天试了下逆地理编码功能，相关代码如下：

 -(void)initMapS{
 if (!self.mapS) {
 self.mapS = [[AMapSearchAPI alloc] initWithSearchKey:GAODEMAPKEY Delegate:self];
 }
 }

//初始化逆地理编码
 -(AMapReGeocodeSearchRequest *)initializeRegeoReqWithLatitude:(double)latitude longitude:(double)longitude{
 AMapReGeocodeSearchRequest *regeoReq = [[AMapReGeocodeSearchRequest alloc]init];
 regeoReq.searchType = AMapSearchType_Geocode;
 regeoReq.location = [AMapGeoPoint locationWithLatitude:latitude longitude:longitude];
 regeoReq.requireExtension = YES;
 return regeoReq;
 }
 // 开始逆地理编码
 -(void)beginGeoCodeWithSearchReq:(AMapReGeocodeSearchRequest *)searchReq{
 if (searchReq) {
 [self initMapS];
 [self.mapS AMapReGoecodeSearch:searchReq];
 }
 }

-(void)onReGeocodeSearchDone:(AMapReGeocodeSearchRequest *)request response:(AMapReGeocodeSearchResponse *)response{
 if (self.isReoGeo) {
 self.isReoGeo = NO;
 }
if(response.regeocode != nil){
    NSString *result = [NSString stringWithFormat:@"%@",response.regeocode.addressComponent];
    NSLog(@"逆地理编码结果:%@",result);
    if(result && result.length > 0){
        self.addCL.text = result;
    }
}


}

最终输出的结果却什么都没有：
逆地理编码结果:{province: , city: , district: , township: , neighborhood: , building: , citycode: , adcode: , streetNumber: {street: , number: , location: {0.000000, 0.000000}, distance: 0, direction: }, businessAreas: }
请问这是什么问题？