ios 百度地图（开启百度地图之旅 2 检索和反检索）

上篇开启百度之旅

3.创建地图周边检索 <BMKMapViewDelegate,BMKLocationServiceDelegate,BMKPoiSearchDelegate>

3.1导入头文件

#import <BaiduMapAPI_Map/BMKMapView.h>//只引入所需的单个头文件

#import <BaiduMapAPI_Map/BMKMapComponent.h>//引入地图功能所有的头文件

#import <BaiduMapAPI_Location/BMKLocationComponent.h>//引入定位功能所有的头文件

#import <BaiduMapAPI_Search/BMKSearchComponent.h>

3.2

{  
 BMKLocationService* _locService;  
 BMKPointAnnotation* pointAnnotation;  
 BMKPoiSearch* _poisearch;   int curPage;  
 }
 @property (nonatomic,strong) BMKMapView* mapView;
//判断是不是第一次开启地图
 @property (nonatomic,assign) BOOL isfirst;
//结果数组
 @property (nonatomic,strong) NSMutableArray *poiListArray;

3.3

/************************检索**************************************/
//这个方法就是在Map移动后执行，所以我们可以在这里获取移动后地图中心点的经纬度了。-(void)mapView:(BMKMapView*)mapView regionDidChangeAnimated:(BOOL)animated
{  
 BMKCoordinateRegionregion; 
 CLLocationCoordinate2DcenterCoordinate = mapView.region.center;
 region.center= centerCoordinate; 
 NSLog(@"regionDidChangeAnimated %f,%f ",centerCoordinate.latitude, centerCoordinate.longitude); 
   //初始化检索对象
 _poisearch=[[BMKPoiSearchalloc]init]; 
 _poisearch.delegate=self;   
 //发起检索 
BMKNearbySearchOption*option = [[BMKNearbySearchOptionalloc]init];   option.pageIndex=curPage; 
option.pageCapacity=50;
option.location=CLLocationCoordinate2DMake(centerCoordinate.latitude,centerCoordinate.longitude);  
option.keyword=@"小区";  
BOOLflag = [_poisearchpoiSearchNearBy:option]; 
if(flag) { 
   NSLog(@"周边检索发送成功");
   }  else {  
     NSLog(@"周边检索发送失败");  
     }  
 }

3.4

/** *根据anntation生成对应的View *@param mapView地图View *@param annotation指定的标注 *@return生成的标注View */
- (BMKAnnotationView*)mapView:(BMKMapView*)view viewForAnnotation:(id<BMKAnnotation>)annotation{ 
     //生成重用标示identifier   
     NSString*AnnotationViewID =@"xidanMark";   //检查是否有重用的缓存
     BMKAnnotationView* annotationView =   [viewdequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];
      //缓存没有命中，自己构造一个，一般首次添加annotation代码会运行到此处
     if(annotationView ==nil) 
        {
            annotationView = [[BMKPinAnnotationViewalloc]initWithAnnotation:annotationreuseIdentifier:AnnotationViewID];                 ((BMKPinAnnotationView*)annotationView).pinColor=BMKPinAnnotationColorRed;
           //设置重天上掉下的效果(annotation)
            ((BMKPinAnnotationView*)annotationView).animatesDrop=YES;
        } 
    //设置位置 
    annotationView.centerOffset=CGPointMake(0, -(annotationView.frame.size.height*0.5));  
    annotationView.annotation= annotation;
     //单击弹出泡泡，弹出泡泡前提annotation必须实现title属性 
     annotationView.canShowCallout=YES;   
   //设置是否可以拖拽    annotationView.draggable=NO
     ((BMKPinAnnotationView*)annotationView).animatesDrop=YES;
     returnannotationView;
}

3.5

#pragma mark -#pragma mark implement BMKSearchDelegate
/** *返回POI搜索结果 *@param searcher 搜索对象 *@param poiResult 搜索结果列表 *@param errorCode 错误号，@see BMKSearchErrorCode */
- (void)onGetPoiResult:(BMKPoiSearch*)searcher result:(BMKPoiResult*)poiResult errorCode:(BMKSearchErrorCode)errorCode{ 
    NSArray* array = [NSArray arrayWithArray:_mapView.annotations];
//移除原来的大头针
    [_mapView removeAnnotations:array];  
    [self.poiListArray removeAllObjects]; 
   if (errorCode == BMK_SEARCH_NO_ERROR) 
   {        
         NSMutableArray *annotations = [NSMutableArray array];
        for (int i = 0; i < poiResult.poiInfoList.count; i++)  
      {       
             BMKPoiInfo* poi = [poiResult.poiInfoList objectAtIndex:i]; 
             NSLog(@"%@",poi.name);
             [self.poiListArray addObject:poi.address];
             /**调用大头针*/
             pointAnnotation = [[BMKPointAnnotation alloc]init];
             pointAnnotation.coordinate =poi.pt;   
            [annotations addObject:pointAnnotation];
        }
         /**调用大头针*/
        [_mapView addAnnotations:annotations]; 
        [_mapView showAnnotations:annotations animated:YES];
    }   
}

4.创建地图反检索 <BMKGeoCodeSearchDelegate>

4.1导入头文件

#import<BaiduMapAPI_Search/BMKSearchComponent.h>

4.2

{
  BMKGeoCodeSearch* _geocodesearch;
}

4.3

/** *用户位置更新后，会调用此函数 *@param userLocation新的用户位置 */
- (void)didUpdateBMKUserLocation:(BMKUserLocation*)userLocation
{ 
   CLLocationCoordinate2Dpt = (CLLocationCoordinate2D){0,0};//初始化
   pt = (CLLocationCoordinate2D){_locService.userLocation.location.coordinate.latitude,       _locService.userLocation.location.coordinate.longitude}; 
   BMKReverseGeoCodeOption*reverseGeocodeSearchOption = [[BMKReverseGeoCodeOptionalloc]init];//初始化反编码请求    reverseGeocodeSearchOption.reverseGeoPoint= pt;//设置反编码的店为pt
   BOOLflag = [_geocodesearchreverseGeoCode:reverseGeocodeSearchOption];
//发送反编码请求.并返回是否成功
   if(flag)   { 
      NSLog(@"反geo检索发送成功");
    }   else    { 
      NSLog(@"反geo检索发送失败");  
  } 
      [_mapViewupdateLocationData:userLocation]; 
  if(_isfirst==YES) { 
  //那么定位点置中    
    self.mapView.centerCoordinate=_locService.userLocation.location.coordinate;
    }  
     [_locServicestopUserLocationService];}

4.4

-(void) onGetReverseGeoCodeResult:(BMKGeoCodeSearch *)searcher result:(BMKReverseGeoCodeResult *)result errorCode:(BMKSearchErrorCode)error
{  
  NSArray* array = [NSArray arrayWithArray:_mapView.annotations]; 
   [_mapView removeAnnotations:array]; 
   [self.poiListArray removeAllObjects]; 
   if (error == 0)    {  
      NSMutableArray *annotations = [NSMutableArray array];    
     for (int i = 0; i < result.poiList.count; i++)    { 
           BMKPoiInfo* poi = [result.poiList objectAtIndex:i]; 
           NSLog(@"%@",poi.name); 
           [self.poiListArray addObject:poi.address];
            pointAnnotation = [[BMKPointAnnotation alloc]init];
            pointAnnotation.coordinate =poi.pt; 
           [annotations addObject:pointAnnotation]; 
                  }
        [_mapView addAnnotations:annotations];
        [_mapView showAnnotations:annotations animated:YES]; 
   }   
}