MKMapView Not being called Swift ios 8 - xcode

Question

Hi im just wondering why isnt my MapView function is not being called. I am trying to draw a line between points but all is showing is just the center location.
Thanks in advance.
import UIKit
import CoreLocation
import MapKit
class ThirdViewController: UIViewController , CLLocationManagerDelegate {
#IBOutlet weak var theMap: MKMapView!
#IBOutlet weak var theLabel: UILabel!
var manager:CLLocationManager!
var myLocations: [CLLocation] = []
override func viewDidLoad() {
super.viewDidLoad()
//Setup our Location Manager
manager = CLLocationManager()
self.manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestAlwaysAuthorization()
manager.startUpdatingLocation()
//Setup our Map View
// theMap.delegate = self
theMap.mapType = MKMapType.Standard
theMap.showsUserLocation = true
}
func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) {
theLabel.text = "\(locations[0])"
myLocations.append(locations[0] as CLLocation)
let spanX = 0.007
let spanY = 0.007
var newRegion = MKCoordinateRegion(center: theMap.userLocation.coordinate, span: MKCoordinateSpanMake(spanX, spanY))
theMap.setRegion(newRegion, animated: true)
println("not yet ")
if (myLocations.count > 1){
println("here ")
var sourceIndex = myLocations.count - 1
var destinationIndex = myLocations.count - 2
let c1 = myLocations[sourceIndex].coordinate
let c2 = myLocations[destinationIndex].coordinate
var a = [c1, c2]
var polyline = MKPolyline(coordinates: &a, count: a.count)
theMap.addOverlay(polyline)
}
}
func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {
println("sad")
if overlay is MKPolyline {
println("aadsfsad")
var polylineRenderer = MKPolylineRenderer(overlay: overlay)
polylineRenderer.strokeColor = UIColor.blueColor()
polylineRenderer.lineWidth = 4
return polylineRenderer
}
return nil
}
}

Answer 1

in ios8+ MapView didn`t load LocationCoordinate automatically. If we want to use MKMapView to load the more accurate location with "mapView:didUpdateUserLocation":
Premise:
1.setup the mapView delegate.
2.setShowsUserLocation:YES
3.mapView must in a container(addSubview:mapView)!!!!!
For example:
self.mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
_mapView.delegate = self;
[_mapView setShowsUserLocation:YES];
[[UIApplication sharedApplication].keyWindow addSubview:_mapView];