如何在MapView中獲取注釋indexpath

Question

我有個問題。
我有一個mapView，並且我的mapView中有很多注釋。
如何知道我選擇注釋的indexPath 。
我找到了函數didSelectAnnotationView但是我不知道如何使用它。

這是我的代碼：

 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;
}

謝謝！

Answer 1

• 您可以通過這種方式獲取所選的注釋索引，

   -(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); } 

  迅速

   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))") } 

• 獲取所選注釋點的annotation title ，並在我們所有名稱的數組中找到它的索引。