Generate pop-over for map pin (announcement)

 func mapView (mapView:MKMapView, viewForAnnotation:MKAnnotation) ->MKAnnotationView? {
    if announcement is MKUserLocation {
        return nil
    }

    // Identifier
    let myAnnotationIdentifier="myAnnotation"

    // Request AnnotationView
    var myAnnotationView: MKAnnotationView!=mapView.dequeueReusableAnnotationViewWithIdentifier (myAnnotationIdentifier)

    // Setting the button to the right of the annotation
    let button —UIButton = UIButton (type: UIButtonType.InfoLight)
    if myAnnotationView == nil {
        myAnnotationView = MKPinAnnotationView (annotation:annotation, reuseIdentifier: myAnnotationIdentifier)

        // Attach a button to the right of the annotation
        myAnnotationView.rightCalloutAccessoryView=button
        myAnnotationView.canShowCallout=true
    }
    return myAnnotationView
}

funcmapView(mapView:MKMapView, announcementView:MKAnnotationView, calloutAccessoryControlTapped control:UIControl){

    print("tapped")
    self.performSegueWithIdentifier("detailController", sender:view)

}