iOS mapView - 只有一個水龍頭的拖動銷

Question

我有一個MapView上有兩個引腳（自定義引腳）。

兩個引腳都設置爲可拖動，但我的問題是我可以拖動其中之一，我必須先選擇它，然後才能開始拖動它。這意味着屏幕上有兩個按鍵。

我知道this的答案，但他只有一個pin在他的地圖上，在我看來，一次只能選擇一個pin，所以設置[MyPin setSelected：YES];在這種情況下不會幫助我。

感謝您的幫助！

//Custom pin on mapview 
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation { 

      MKAnnotationView *MyPin=[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"]; 

      MyPin.draggable = YES; 

      //Get annotaion title to determine what image to use 
      MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc]init]; 
      annotationPoint = annotation; 

      if([annotationPoint.title isEqualToString:@"user"]) 
      { 
       MyPin.image = [UIImage imageNamed:@"userLocation_pin"]; 
       MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]); 
      } 
      else if ([annotationPoint.title isEqualToString:@"destination"]) 
      { 
       MyPin.image = [UIImage imageNamed:@"destination_pin_up"]; 
       MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]); 
      } 

      return MyPin; 
     } 

Answer 1

通過添加[MyPin setSelected：YES]來解決我自己的問題;裏面的if語句是這樣的：

//Custom pin on mapview 
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation { 

      MKAnnotationView *MyPin=[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"]; 

      MyPin.draggable = YES; 

      //Get annotaion title to determine what image to use 
      MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc]init]; 
      annotationPoint = annotation; 

      if([annotationPoint.title isEqualToString:@"user"]) 
      { 
       MyPin.image = [UIImage imageNamed:@"userLocation_pin"]; 
       MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]); 
       [MyPin setSelected:YES]; 
      } 
      else if ([annotationPoint.title isEqualToString:@"destination"]) 
      { 
       MyPin.image = [UIImage imageNamed:@"destination_pin_up"]; 
       MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]); 
       [MyPin setSelected:YES]; 
      } 

      return MyPin; 
     }