How to know whether MKMapView visibleMapRect contains a Coordinate?

Question

If I have a MKMapView and a CLLocationCoordinate2D how do you test whether the map's visible area contains the coordinate?

Accepted Answer

The fastest way is to use the inbuilt Apple functions which will make this sort of thing super quick!

```
if(MKMapRectContainsPoint(mapView.visibleMapRect, MKMapPointForCoordinate(coordinate)))
{
    //Do stuff
}
```

Where coordinate is your CLLocation2D.

This will be much faster than working out coordinates with a bulk if statement. Reason is that Apple use a Quadtree and can do fast lookups for you.

Solution