How do I add a UIView on top of a MKAnnotationView and then display it on a MKMapView?

Question

My goal is to have custom pins on a MKMapView . I have a UIView with a label on it and I'd like to use it for the custom pins. I've implemented the viewForAnnotation method to display my UIView on the map.

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation {
        return mapView.dequeueReusableAnnotationViewWithIdentifier("")
    } else {
        let annotationView = MKAnnotationView()
        annotationView.canShowCallout = false
        annotationView.addSubview(myView) // myView is the regular UIView
        return annotationView
    }
}

The pins are now displayed, but they're placed randomly on the map. I think this is because I have to create a MKAnnotation and assign coordinates to it. How do I add a UIView to a MKAnnotationView and then display it on a MKMapView ?

Answer 1

您省略了一个微小但关键的步骤：在每种情况下，您必须将传入注释分配给注释视图的annotation属性。