how to use MapView from a framework library Xcode8 - ios

Question

I created a custom tile service and add it to a mapView then it works fine. then I used the same code and created a framework library with a MapView return type in Xcode 8. then I used a sample test app and import that library to it and I called the method used in library and add it to a mapView. So my problem Is when I call and that method to mapView it displays the MapKit map not my custom map
code used in library
import Foundation
import MapKit
public class mapLib: NSObject{
public class func createMap(mapView: MKMapView) ->MKMapView{
let mapView = mapView
//custom map URL
let template = "http://tile.openstreetmap.org/{z}/{x}/{y}.png"
let overlay = MKTileOverlay(urlTemplate: template)
overlay.canReplaceMapContent = true
mapView.add(overlay, level: .aboveLabels)
return mapView;
}
}
code used in app
import UIKit
import MapKit
import mapLib
class ViewController: UIViewController {
#IBOutlet weak var mapV: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
let view = mapLib.createMap(mapView: mapV)
mapV.addOverlays(view.overlays)
//any additional setup after loading the view, typically from a nib.
}
I need to clarify that the way I'm going to approach would work or any other method to do it :)

Answer 1

You are missing add self as delegate and implement func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer method, you can do this in your library
something like this
import Foundation
import MapKit
public class mapLib: NSObject{
public class func createMap(mapView: MKMapView) ->MKMapView{
let mapView = mapView
//custom map URL
let template = "http://tile.openstreetmap.org/{z}/{x}/{y}.png"
let overlay = MKTileOverlay(urlTemplate: template)
overlay.canReplaceMapContent = true
mapView.add(overlay, level: .aboveLabels)
mapView.delegate = self
return mapView;
}
}
extension mapLib : MKMapViewDelegate{
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
if let overlayTile = overlay as? MKTileOverlay{
let overLayRenderer = MKTileOverlayRenderer(tileOverlay: overlayTile)
return overLayRenderer
}
return MKOverlayRenderer(overlay: overlay)
}
}