How to make a MGLPolyline tapable?

问题

I am currently looking for a way to make a route (MGPLPolyline) tappable such that a user can choose between two possible routes under Mapbox. Unfortunately the route annotation doesn't seem to be tappable at all:

While i have properly set my MGLMapViewDelegate this method:

func mapView(_ mapView: MGLMapView, didSelect annotation: MGLAnnotation)

is never invoked.

What did i miss knowing that each line inherited from MGLPolyline which is a subclass of an MGLAnnotation (which i was expected to be tappable...).

回答1:

The Mapbox iOS API doesn't support that yet, unfortunately. See here.

There are a couple of workarounds within that link that you could try though.

UPDATE: This is now possible: Check here.

回答2:

You could do the following:

First, when you create the polyline do the following:

let polyline = CustomPolyline(coordinates: &coordinates, count: UInt(coordinates.count))

polyline.title = "" //It does not seem to matter what you set it to.

polyline.color = .darkGray

Then in the following method return false:

 func mapView(_ mapView: MGLMapView, annotationCanShowCallout annotation: MGLAnnotation) -> Bool {
    // Always allow callouts to popup when annotations are tapped.
    print("ran?")
    return false
}

来源：https://stackoverflow.com/questions/43683846/how-to-make-a-mglpolyline-tapable