How to get annotation indexpath in mapview

Question

I have a problem.
I have a mapView, and I have many annotations in my mapView.
how to know the indexPath that I select the annotation.
I find the function didSelectAnnotationView but I don't know how to use it.

This is my code:

 BOOL firstLocationReceived;

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
{
    CLLocation *currentLocation = locations.lastObject; //current location

    if(firstLocationReceived == NO)
    {
        MKCoordinateRegion region = _shopMapView.region;
        region.center = currentLocation.coordinate;
        region.span.latitudeDelta = 0.05;
        region.span.longitudeDelta = 0.05;

        [_restaurantMapView setRegion:region animated:true];

        //Add Annotation

        for (int i = 0; i < self.items.count ; i++) 
        {
            MKPointAnnotation *annotation = [MKPointAnnotation new];

            NSDictionary *item = self.items[i];

            CLLocationDegrees latitude = [item[@"latitude"] doubleValue];
            CLLocationDegrees longitude = [item[@"longitude"] doubleValue];

            annotation.coordinate = CLLocationCoordinate2DMake(latitude, longitude);
            annotation.title = item[@"name"];
            annotation.subtitle = item[@"address"];

            [_shopMapView addAnnotation:annotation];

          firstLocationReceived == YES;
        }
    }
}

-(MKAnnotationView*)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
    if (annotation == mapView.userLocation)
    {
        return nil;
    }

    NSString *identifier = @"shop";

    MKAnnotationView *result = [mapView dequeueReusableAnnotationViewWithIdentifier:identifier];

    if(result ==nil)
    {
        result = [[MKAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:identifier];
    }
    else
    {
        result.annotation = annotation;
    }
    result.canShowCallout = true;

    UIImage *annotationViewImage = [UIImage imageNamed:@"point.png"];
    result.image = annotationViewImage;

    result.leftCalloutAccessoryView = [[UIImageView alloc]initWithImage:annotationViewImage];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    [button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];
    result.rightCalloutAccessoryView = button;

    return result;
}

Thanks!

see this http://stackoverflow.com/questions/12369328/detecting-the-selected-map-annotation-xcode — Anbu.Karthik, Sep 02 '16 at 05:25
http://stackoverflow.com/questions/38156800/how-to-get-annotation-index-in-mapkit/38157106#38157106 see this — balkaran singh, Sep 02 '16 at 05:28

Gokul G · Answer 1 · 2018-06-21T07:32:36.267

You can get your selected annotation index by this way,

-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{
     MKPointAnnotation * annotation = [[MKPointAnnotation alloc]init];
     annotation = view.annotation;
     NSString * selectedTitle = [NSString stringWithFormat:@"%@",annotation.title];
     NSInteger index = [[self.items valueForKey:@"name"] indexOfObject:selectedTitle]; //Considering self.items as NSDictionary consist of all annotation names.
     NSLog(@"You selected index: %ld",(long)index);
}

Swift

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    var annotation = MKPointAnnotation()
    if let anAnnotation = view.annotation as? MKPointAnnotation {
       annotation = anAnnotation
    }
    let selectedTitle = "\(annotation.title ?? "")"
    let index: Int? = (items["name"] as? NSArray)?.index(of: selectedTitle)
    //Considering self.items as NSDictionary consist of all annotation names.
    print("You selected index: \(Int(index))")
}

Get the annotation title of selected annotation point and lets find it's index in our array of all names.

@imbeginner_sorry did you checked it..? – Gokul G Sep 07 '16 at 11:37 — Gokul G, Sep 07 '16 at 11:37
@DaniSpringer Yeah sure.. Please check updated answer – Gokul G Jun 21 '18 at 07:33 — Gokul G, Jun 21 '18 at 07:33

How to get annotation indexpath in mapview

1 Answers1