I need to check if user location belongs to the MKCoordinateRegion. I was surprised not to find simple function for this, something like: CGRectContainsCGPoint(rect, point).
I found following piece of code:
CLLocationCoordinate2D topLeftCoordinate =
CLLocationCoordinate2DMake(region.center.latitude
+ (region.span.latitudeDelta/2.0),
region.center.longitude
- (region.span.longitudeDelta/2.0));
CLLocationCoordinate2D bottomRightCoordinate =
CLLocationCoordinate2DMake(region.center.latitude
- (region.span.latitudeDelta/2.0),
region.center.longitude
+ (region.span.longitudeDelta/2.0));
if (location.latitude < topLeftCoordinate.latitude || location.latitude > bottomRightCoordinate.latitude || location.longitude < bottomRightCoordinate.longitude || location.longitude > bottomRightCoordinate.longitude) {
// Coordinate fits into the region
}
But, I am not sure if it is accurate as documentation does not specify exactly how the region rectangle is calculated.
There must be simpler way to do it. Have I overlooked some function in the MapKit framework documentation?
In case there is anybody else confused with latitudes and longitues, here is tested, working solution: