swift custom map class - ios

Question

I am learning Swift and want to create a subclass of MKMapKit to encapsulate some specific functionality, like checking distance between two points and creating custom annotations and separate all the map code into one class.
I have created a class:
class GameMapViewController: MKMapView, MKMapViewDelegate{...}
I initiate the class in code in the main view controller (and adding it as a subview to a view on the storyboard so I can control where it is more easily):
gameMap = GameMapViewController(container: mapViewHolder)
which sets everything up ok and all works EXCEPT for when I want to trigger a segue from a custom annotation:
func mapView(mapView: MKMapView!, didSelectAnnotationView view: MKAnnotationView!) {...}
The didSelectAnnotationView gets called when I tap on an annotation callout but nothing has the method performSegueWithIdentifier that I am looking for, that all the solutions to similar questions suggest I should be using....
(I have tried putting a MapKit View onto the storyboard and changing its class to use GameMapViewController but none of the init functions get fired)
I am guessing its something to with how I am initialising my custom class?
MainViewController.swift:
override func viewDidLoad() {
super.viewDidLoad()
....
// Create the game map
gameMap = GameMapViewController(container: mapViewHolder)
mapViewHolder.addSubview(gameMap)
...
}
GameMapViewController.swift:
import UIKit
import MapKit
class GameMapViewController: MKMapView, MKMapViewDelegate{
var spanQuestion:MKCoordinateSpan = MKCoordinateSpanMake(180, 180)
var spanAnswer:MKCoordinateSpan = MKCoordinateSpanMake(180, 180)
var hasUserCityLocationGuess: Bool = false
var containingView: UIView
override init(){
println ("GameMapViewController init")
containingView = UIView()
super.init(frame: CGRect(x: 0, y: 0, width: 1000, height: 1000))
self.delegate=self
var latDeltaAnswer:CLLocationDegrees = 50
var lngDeltaAnswer:CLLocationDegrees = 50
spanAnswer = MKCoordinateSpanMake(latDeltaAnswer, lngDeltaAnswer)
var latDeltaQuestion:CLLocationDegrees = 180
var lngDeltaQuestion:CLLocationDegrees = 180
spanQuestion = MKCoordinateSpanMake(latDeltaQuestion, lngDeltaQuestion)
}
required init(coder aDecoder: NSCoder) {
containingView = UIView()
super.init(coder: aDecoder)
self.delegate = nil
println ("GameMapViewController init with decoder")
}
convenience init(container: UIView) {
println ("GameMapViewController convenience")
self.init()
self.delegate = self
containingView = container
}
func mapViewDidFinishLoadingMap(mapView: MKMapView!) {
println("mapViewDidFinishLoadingMap")
}
func mapViewWillStartLoadingMap(mapView: MKMapView!) {
self.frame = CGRect (x: 0, y: 0, width: containingView.frame.width, height: containingView.frame.height)
self.contentMode = UIViewContentMode.ScaleAspectFill
superview?.sizeToFit()
var guessPlaceRecognizer = UILongPressGestureRecognizer(target: self, action: "guessPlace:")
guessPlaceRecognizer.minimumPressDuration = 1.0
mapView.addGestureRecognizer(guessPlaceRecognizer)
mapView.mapType = MKMapType.Satellite
}
func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {
if overlay is MKCircle {
var circleRenderer = MKCircleRenderer(overlay: overlay)
circleRenderer.strokeColor = UIColor.redColor()
circleRenderer.fillColor = UIColor(red: 255, green: 0, blue: 0, alpha: 0.1)
circleRenderer.lineWidth = 1
//userOverlayCircleRender = circleRenderer
return circleRenderer
} else {
return nil
}
}
func guessPlace(gestureRecognizer:UIGestureRecognizer){
let guessPlaceFirst = NSUserDefaults.standardUserDefaults().boolForKey("guess_place_preference")
if guessPlaceFirst {
var touchPoint = gestureRecognizer.locationInView(self)
var newCoord:CLLocationCoordinate2D = self.convertPoint(touchPoint, toCoordinateFromView: self)
var userAnnotation = UserPointAnnotation()
userAnnotation.coordinate = newCoord
self.addAnnotation(userAnnotation)
var getLat: CLLocationDegrees = newCoord.latitude
var getLon: CLLocationDegrees = newCoord.longitude
var circleCenter: CLLocation = CLLocation(latitude: getLat, longitude: getLon)
addRadiusCircle(circleCenter)
hasUserCityLocationGuess = true
}
}
func showCity() {
let location = CLLocationCoordinate2D(latitude: (currentCity["latitude"]! as CLLocationDegrees), longitude: (currentCity["longitude"]! as CLLocationDegrees))
let region:MKCoordinateRegion = MKCoordinateRegionMake(location, self.spanAnswer)
let city: String = currentCity["city"]! as String
let conditions: String = currentCity["description"] as String
let country: String = currentCity["country"]! as String
let address = "\(city), \(country)"
let cityAnnotation = CityPointAnnotation()
cityAnnotation.title = address
cityAnnotation.subtitle = "\(conditions)"
cityAnnotation.coordinate = location
self.setRegion(region, animated: true)
self.addAnnotation(cityAnnotation)
self.selectAnnotation(cityAnnotation, animated: true)
}
func cityInfoClick(sender:UIButton){
//sender.performSegueWithIdentifier("segueCityWebView")
}
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
// Handle any custom annotations.
if annotation is CityPointAnnotation {
// Try to dequeue an existing pin view first.
let reuseId = "CityPointAnnotationView"
var annotationView = self.dequeueReusableAnnotationViewWithIdentifier(reuseId)
if annotationView == nil {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
annotationView.image = UIImage(named: "marker.png")
annotationView.rightCalloutAccessoryView = UIButton.buttonWithType(.InfoDark) as UIButton
annotationView.canShowCallout = true
return annotationView;
} else {
annotationView.annotation = annotation
}
return annotationView
}
return nil;
}
func mapView(mapView: MKMapView!, didSelectAnnotationView view: MKAnnotationView!) {
println("didSelectAnnotationView")
}
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
println("calloutAccessoryControlTapped1")
///////////////////
// I want to do a segue here
// but nothing has the method performSegueWithIdentifier (self, mapView, control....)
///////////////////
}
func resetMap(){
self.removeAnnotations(self.annotations)
self.removeOverlays(self.overlays)
var region:MKCoordinateRegion = MKCoordinateRegionMake(self.centerCoordinate, spanQuestion)
self.setRegion(region, animated: true)
hasUserCityLocationGuess = false
}
func addRadiusCircle(location: CLLocation){
var radius = NSUserDefaults.standardUserDefaults().doubleForKey("guess_place_radius") as CLLocationDistance
var circle = MKCircle(centerCoordinate: location.coordinate, radius: radius )
self.removeOverlays(self.overlays)
self.addOverlay(circle)
}
func doGeoCode( cityObject:PFObject ) -> Bool {
....
}
func userCityLocationGuess(userGuessTemp:Int)->NSDictionary {
....
}
}

Answer 1

It's because you're confusing views and view controllers. You have a view (subclass of MKMapView, but you're naming it and trying to use it as a controller. It is also doings the job of a controller.
So, you should really have a view controller which owns and configures a map view (plain MKMapView), and then it can interact with segues.