How do I create an image overlay and add to MKMapView?

Question

I am trying to learn MapKit and am now trying to add an image as an overlay to the map view. I can\'t seem to find any sample code to help explain how to do this.

Ca

Answer 1

In the search for a solution for my problem, I keep coming back to this question, and here and also here

They were all answering the question I needed answered but in reverse.

I needed to determine if a UIView, i.e. a draw square on my MapView contains a map pin, if it does let me know so I can remove it or select it etc.

Finally after trying to convert my UIView into some MKCoordinateRegion or alike, I thought work backwards. Instead of turning my UIView or square into map madness, I turned the pins into simple CGPoints and did a simple Rect contains point. Which ended up being my solution.. after about 2 hrs!

Hope this help someone down the line

 func findMapPinsWithinBox() {

    guard let myBox = myBox else { return } // some UIView you have drawn or placed on map

    let visibleMapRect = mapView.visibleMapRect
    let visibleAnnotations =  mapView.annotationsInMapRect(visibleMapRect)

    for pin in visibleAnnotations {

        // depending on design you may need to do some casting here
        // ie let pin = pin as! MyMapAnnotation

        let pinsCGPoint = mapView.convertCoordinate(pin.coordinate, toPointToView: self.view)

        if myBox.frame.contains(pinsCGPoint) {
            print("Pin Found within the Box")
            // select pin or delete etc
        }
    }
}