title: Updating MKMapView Annotations from Updated array?
body: <p>I am working with an <code>NSMutableArray</code> of objects that conform to the <code>MKAnnotation</code> protocol. My question is over time new objects are added to the array, can anyone tell me what is the preferred method for updating the annotations on the mapView. Should I be looking at removing all the pins before adding back the updated array, or would I be better to mark/tag existing pins in the <code>MKAnnotation</code> object and only add back the new (un-tagged) pins?</p>