func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView?
    {
        if annotation is MKUserLocation
        {
            return nil
        }


        let annotationIdentifier = "AnnotationIdentifier"
        var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier)

        if annotationView == nil {
            annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
            annotationView!.canShowCallout = false
            annotationView!.rightCalloutAccessoryView = UIButton.init(type: UIButtonType.infoLight)
        }
        else {
            annotationView!.annotation = annotation
            annotationView!.canShowCallout = false
        }

        if isRequestSelected == true {

            let pinImage = UIImage(named: "bluePin")
            annotationView!.image = pinImage
        }
        else
        {
            let pinImage = UIImage(named: "bluePin")
            annotationView!.image = pinImage
        }

        if let pointAnnotation = annotationView?.annotation as? CustomMKPointAnnotation {


            if pointAnnotation.isMyProfile {
                let pinImage = UIImage(named: "my_location_pin")
                annotationView!.image = pinImage
                return annotationView
            }


            if pointAnnotation.tag == 100 {
                let pinImage = UIImage(named: "map_marker")
                annotationView!.image = pinImage
            }
        }

        annotationView!.canShowCallout = false
        annotationView?.addTapGestureRecognizer(action: {
            if self.selectedAnnotationView != nil {
                for subview in self.selectedAnnotationView!.subviews
                {
                    subview.removeFromSuperview()
                }
            }
            let views = Bundle.main.loadNibNamed("CustomCalloutView", owner: nil, options: nil)
            let calloutView = views?[0] as! CustomCalloutView
            calloutView.center = CGPoint(x: annotationView!.bounds.size.width / 2, y: -calloutView.bounds.size.height*0.52)

            self.selectedUserID = (annotationView?.annotation as? CustomMKPointAnnotation)?.userID ?? ""

            calloutView.nameLabel.text = (annotationView?.annotation as? CustomMKPointAnnotation)?.title

            calloutView.nameLabel.text = (annotationView?.annotation as? CustomMKPointAnnotation)?.title
            calloutView.skillLabel.text = (annotationView?.annotation as? CustomMKPointAnnotation)?.subtitle
            calloutView.ratingView.rating = (annotationView?.annotation as? CustomMKPointAnnotation)?.ratings ?? 0.0
            calloutView.ratingView.text = "(" + "((annotationView?.annotation as? CustomMKPointAnnotation)!.totalReviews)" + ")"
            calloutView.bussinessLabel.text = (annotationView?.annotation as? CustomMKPointAnnotation)?.bussinessName
            calloutView.profileImageView.sd_setImage(with: URL(string: (annotationView?.annotation as? CustomMKPointAnnotation)?.profileImage ?? ""), placeholderImage: UIImage(named: "defaultProfile"))
            annotationView!.addSubview(calloutView)
            mapView.setCenter((annotationView!.annotation?.coordinate)!, animated: true)
            self.selectedAnnotationView = annotationView
        })
        return annotationView
    }