I'm currently working on an application that displays annotations on the map. They have multiple colours that represent different things. For example green represents cafes and Purple is to represent museums. I would like to be able to have a button that filters the annotations so that all the purple show whilst the other colours stay hidden and vice versa.
Thanks in advance, Niall.
MKAnnotationView, being a subclass of UIView, has a hidden property. Just filter your mapView.annotations based on the UI and apply a true value to that property.