Swift 2 Adding callouts to annotations - swift2

Question

I'm having extreme difficulty having callouts added to my annotations. I've removed any attempt at adding the callout from the code below.
The annotations are added at the bottom of the updateVisiblePins function
import UIKit
import MapKit
import CoreLocation
import Foundation
class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
#IBOutlet weak var mapView: MKMapView!
var locationManager = CLLocationManager()
var landmarkToPass: String!
var rowIndex: Int!
struct MyVars {
static var prevLoc = CLLocation()
static var region = MKCoordinateRegion()
static var landmarks = [Landmark]()
static var landmark: Landmark = Landmark(title: String(), locationName: String(), discipline: String(), coordinate: CLLocationCoordinate2D())
}
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager = CLLocationManager()
self.locationManager.delegate = self
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
self.mapView.showsUserLocation = true
var landmarks: [Landmark] = [Landmark]()
loadInitialData()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
var prevLoc = MyVars.prevLoc
let userLoction: CLLocation = locations[0]
let distance = calculateDisatnceBetweenTwoLocations(prevLoc, destination: userLoction)
if prevLoc != userLoction {
prevLoc = userLoction
MyVars.prevLoc = userLoction
if distance > 5 {
let latitude = userLoction.coordinate.latitude
let longitude = userLoction.coordinate.longitude
let latDelta: CLLocationDegrees = 0.05
let lonDelta: CLLocationDegrees = 0.05
let span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, lonDelta)
let location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
MyVars.region = MKCoordinateRegionMake(location, span)
self.mapView.showsUserLocation = true
self.mapView.setRegion(MyVars.region, animated: true)
updateVisiblePins()
} else {
let latitude = userLoction.coordinate.latitude
let longitude = userLoction.coordinate.longitude
let span = mapView.region.span
let location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
MyVars.region = MKCoordinateRegionMake(location, span)
self.mapView.showsUserLocation = true
updateVisiblePins()
}
}
}
func calculateDisatnceBetweenTwoLocations(source:CLLocation,destination:CLLocation) -> Double{
var distanceMeters = source.distanceFromLocation(destination)
var distanceKM = distanceMeters / 1000
return distanceKM
}
func updateVisiblePins() {
for (index, landmark) in MyVars.landmarks.enumerate() {
let landmarkLat = landmark.coordinate.latitude
let landmarkLon = landmark.coordinate.longitude
let userLocation = locationManager.location
let landmarkLocation = CLLocation(latitude: landmarkLat, longitude: landmarkLon)
let distance = calculateDisatnceBetweenTwoLocations(userLocation!, destination: landmarkLocation)
if distance < 30 {
mapView.addAnnotation(landmark)
} else {
if rowIndex != nil {
if index == rowIndex{
self.mapView.addAnnotation(landmark)
} else {
mapView.removeAnnotation(landmark)
}
}
}
}
}
func loadInitialData() {
// 1
let fileName = NSBundle.mainBundle().pathForResource("PublicLandmark", ofType: "json")
var data: NSData = NSData()
do {
data = try NSData(contentsOfFile: fileName!, options: [])
} catch {
}
// 2
var jsonObject: AnyObject!
do {
jsonObject = try NSJSONSerialization.JSONObjectWithData(data,
options: [])
} catch {
}
// 3
if let jsonObject = jsonObject as? [String: AnyObject],
// 4
let jsonData = JSONValue.fromObject(jsonObject)?["data"]?.array {
for landmarkJSON in jsonData {
if let landmarkJSON = landmarkJSON.array,landmark = Landmark.fromJSON(landmarkJSON) {
MyVars.landmarks.append(landmark)
}
}
}
}
}

Answer 1

The mapView.delegat = self line needs to be added to viewDidLoad() function.