Display thousands of map annotations efficiently
WHAT IT TESTS: Annotation clustering and view reuse in MapKit. OUTLINE: Enable clustering via clusteringIdentifier, reuse views with dequeueReusableAnnotationView, render clusters with MKClusterAnnotation in viewFor.
WHAT IT TESTS: Whether you know MapKit's built-in clustering and reuse mechanisms. ANSWER OUTLINE: Add the data as lightweight MKAnnotation objects, but render efficiently with annotation clustering: give annotation views a clusteringIdentifier so MapKit groups nearby pins into MKClusterAnnotation at low zoom. Reuse views with mapView.dequeueReusableAnnotationView(withIdentifier:) inside mapView(_:viewFor:), and register reuse identifiers. This keeps only visible views allocated.
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- #ios
- #mapkit
- #annotations
- #clustering
- #performance
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