#import <BaiduMapAPI_Base/BMKBaseComponent.h>
#import <BaiduMapAPI_Search/BMKSearchComponent.h>

BMKDistrictSearch *search = [[BMKDistrictSearch alloc] init];

search.delegate = self;

BMKDistrictSearchOption *option = [[BMKDistrictSearchOption alloc] init];  
option.city = @"北京";
option.district = @"朝阳区";  

BOOL flag = [search districtSearch:option];  
if (flag) {  
    NSLog(@"district检索发送成功");  
}  else  {  
    NSLog(@"district检索发送失败");  
}  

/**
*返回行政区域搜索结果
 *@param searcher 搜索对象
 *@param result 搜索结果BMKDistrictSearch
 *@param error 错误号，@see BMKSearchErrorCode
 */ 
- (void)onGetDistrictResult:(BMKDistrictSearch *)searcher result:(BMKDistrictResult *)result errorCode:(BMKSearchErrorCode)error {  
   if (error == BMK_SEARCH_NO_ERROR) {  
         //在此处理正常结果  
   } else {  
       NSLog(@"检索失败");  
   }  
}