Add multiple pins on the Ios gold map How do I know which pin I clicked in the multiplexing queue?

Create a Pin object     MAPointAnnotation *pointAnnotation = [[MAPointAnnotation  alloc] init];    //where to insert the pin     pointannotation.coordinate =  cllocationcoordinate2dmake (39.989631, 116.481018);     //pin title      pointannotation.title = @ "Fang Heng International";     //pin sub-title      pointannotation.subtitle = @ "No. 6th, Fu Tong East Street";     [_mapview addannotation: Pointannotation];//The following methods can make the map pin pop-up bubble-  (maannotationview *) Mapview: (mamapview *) mapview  Viewforannotation: (id <maannotation>) annotation{    if  ([annotation  Iskindofclass:[mapointannotation class]])     {         static nsstring *pointreuseindetifier = @ "Pointreuseindetifier";         MAPinAnnotationView*annotationView =  (mapinannotationview*) [mapview  dequeuereusableannotationviewwithidentifier:pointreuseindetifier];         if  (Annotationview == nil)         {             annotationview = [[mapinannotationview  alloc] initWithAnnotation:annotation reuseIdentifier:pointReuseIndetifier];         }        annotationview.canshowcallout=  yes;       //set bubbles can pop up, default is no         annotationview.animatesdrop = yes;        //Set the callout animation display, Default is no        annotationview.draggable = yes;         //setting annotations can beDrag, default to no        annotationview.pincolor =  mapinannotationcolorpurple;        return annotationview;             }    return nil;} Use coordinate information to judge     you didn't say the exact effect you wanted    I'll tell you one.    suppose you have n pins on the map    In fact, that is, n pointannotation   you can get to   directly by _mapview.annotations This is the array    in the method of clicking the Pin-  ( void) Mapview: (bmkmapview *) Mapview didselectannotationview: (bmkannotationview *) View{NSArray  * array = [nsarray arraywitharray:_mapview.annotations];    for   (int i=0; i<array.count; i++)     {         if  (view.annotation.coordinate.latitude == (bmkpointannotation*) array[i]). Coordinate.latitude) &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSp {            //gets to the current pin    You can do some things         }        else         {             //operation of the remaining pins    I was deleting             //[ _mapview removeannotation:array[i]];        }     }}

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Add multiple pins on the Ios gold map How do I know which pin I clicked in the multiplexing queue?