How to draw or make custom route using MKMapView - ios

Question

I am trying to write an app that will show the route of a tram line. I have added the map, but I am having problems trying to find how to add this route to my app.
I have looked at MKOverlayRenderer and I think I have to add an image on top of the map to do this. There are some tutorials but they are outdated.
Can someone help me with this. Thank you

Answer 1

As a beginner you should check the https://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial.
example
func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer! {
if overlay is MKPolyline {
let lineView = MKPolylineRenderer(overlay: overlay)
lineView.strokeColor = UIColor.redColor()
lineView.lineWidth = 1
return lineView
}
return nil
}
func addRoute() {
mapView.deselectAnnotation(selectedAnnotationView.annotation, animated: true)
let track = Track.GetAll()// to get list of coordinates you should write your own way to store
if track.count == 0 {
return
}
var pointsToUse: [CLLocationCoordinate2D] = []
var isTrackChanged = false
for i in 0...track.count-1 {
let x = CLLocationDegrees((track[i].Latitude as NSString).doubleValue)
let y = CLLocationDegrees((track[i].Longitude as NSString).doubleValue)
pointsToUse += [CLLocationCoordinate2DMake(x, y)]
if i > 0 {
if pointsToUse[i-1].latitude != pointsToUse[i].latitude || pointsToUse[i-1].longitude != pointsToUse[i].longitude {
isTrackChanged = true
}
}
}
let myPolyline = MKGeodesicPolyline(coordinates: &pointsToUse, count: track.count)
mapView.addOverlay(myPolyline)
}
//model
class Track{
var latitude =""
var longitude=""
}