make pin draggable and long click - ios

Question

I've been trying for hours to make the pin draggable in MapKit, but it seems that the pin is so stubborn it didn't want to move.
this is my code:
import UIKit
import MapKit
protocol AddCoffeeDelegate {
func viewController(vc: AddCoffeeViewController, didAddCoffee coffee : Coffee! )
}
class AddCoffeeViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
#IBOutlet var mapView: MKMapView!
#IBOutlet weak var coffeeName: UITextField!
#IBOutlet weak var coffeeRating: UITextField!
var coffee: Coffee?
var delegate: AddCoffeeDelegate?
////////////////////////////////////////////////////
var coreLocationManager = CLLocationManager()
var locationManager : LocationManager!
var savedLocation : CLLocation?
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKPointAnnotation {
let pinAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myPin")
pinAnnotationView.pinTintColor = UIColor.redColor()
pinAnnotationView.draggable = true
pinAnnotationView.canShowCallout = false
pinAnnotationView.animatesDrop = true
return pinAnnotationView
}
return nil
}
func getLocation(){
locationManager.startUpdatingLocationWithCompletionHandler { (latitude, longitude, status, verboseMessage, error) -> () in
self.displayLocation(CLLocation(latitude: latitude, longitude: longitude))
}
}
func displayLocation(location: CLLocation){
mapView.setRegion(MKCoordinateRegion(center: CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude), span: MKCoordinateSpanMake(0.05, 0.05)), animated: true)
let locationPinCoord = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let annotation = MKPointAnnotation()
annotation.title = "My Title"
annotation.subtitle = "My Subtitle"
annotation.coordinate = locationPinCoord
mapView.addAnnotation(annotation)
savedLocation = location
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status != CLAuthorizationStatus.NotDetermined || status != CLAuthorizationStatus.Denied || status != CLAuthorizationStatus.Restricted {
getLocation()
}
}
////////////////////////////////////////////////////
override func viewDidLoad() {
super.viewDidLoad()
coreLocationManager.delegate = self
locationManager = LocationManager.sharedInstance
let authorizationCode = CLLocationManager.authorizationStatus()
if authorizationCode == CLAuthorizationStatus.NotDetermined && coreLocationManager.respondsToSelector("requestAlwaysAuthorization") || coreLocationManager.respondsToSelector("requestWhenInUseAuthorization"){
if NSBundle.mainBundle().objectForInfoDictionaryKey("NSLocationAlwaysUsageDescription") != nil {
coreLocationManager.requestAlwaysAuthorization()
}else{
print("no desscription provided ")
}
}else{
getLocation()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func cancel(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
#IBAction func save(sender: AnyObject) {
var createdCoffee = Coffee()
createdCoffee.name = self.coffeeName.text!
createdCoffee.rating = Double(self.coffeeRating.text!)!
createdCoffee.place = savedLocation
self.coffee = createdCoffee
self.delegate?.viewController(self, didAddCoffee: self.coffee)
}
}
I have tried every related issue with mapkit in swift, but it seems that the pin won't drag itself.Where could the problem be? I have already set the title and implement the MKMapViewDelegate protocol, but still it wont drag.

Answer 1

Did you set the delegate of the mapview to the view controller either in code, or via the Storyboard?
override func viewDidLoad() {
super.viewDidLoad()
mapView.delegate = self
...
}