CODEWITHSUNDEEP
swiftuikitmkmapview
Ben Robinson
Ben Robinson

Reputation: 1745

mapView.annotations(in: mapView.visibleMapRect) returning hidden clusters

In my MKMapView I have this code:

let annotations = mapView.annotations(in: mapView.visibleMapRect)
let clusterAnnotations = annotations.compactMap { $0 as? MKClusterAnnotation }

This works and will populate clusterAnnotations with the clusters currently visible.

However if I mess around with the map, zooming in and out (so the clusters are repeatably re-calculated); when I settle the map and re-run this code clusterAnnotations will contain annotations that have been removed (de-clustered).

If I only look at the standard annotations, they are correct - the problem is only with the MKClusterAnnotation.

I assume MapKit is holding on for efficiency; but how can I get only the clusters that are actually shown?

The code is run on a button click (rather than during map interaction), so I don't mind too much if the solution is a little slow...

Upvotes: 0

Views: 22

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