Messenger

calloutAccessoryControlTapped-MapViewController.swift

func mapView(mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        let coordinate = view.annotation!.coordinate
        
        let geocoder = CLGeocoder()
        let location = CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude)
        
        geocoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in
            if (error != nil) {
                print("Error occured \(error!.localizedDescription)")
                return
            }
            
            if placemarks != nil && placemarks!.count > 0 {
                let clPlacemark = placemarks!.first!
                let placemark = MKPlacemark(placemark: clPlacemark)
                let mapItem = MKMapItem(placemark: placemark)
                
                mapItem.name = view.annotation!.title!
                
                var mapItems = [MKMapItem]()
                
                mapItems.append(mapItem)
                mapItems.append(MKMapItem.mapItemForCurrentLocation())
                
                let launchOptions: [String:AnyObject] = [MKLaunchOptionsMapTypeKey : MKMapType.Hybrid.rawValue, MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeDriving]
                
                MKMapItem.openMapsWithItems(mapItems, launchOptions: launchOptions)
            }
            
        })
        
    }

didUpdateLocations-LocationManager.swift

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        
        let newLocation = locations.last!
        let locationAge = -newLocation.timestamp.timeIntervalSinceNow
        
        if locationAge > 5.0{
            return
        }
        
        if newLocation.horizontalAccuracy < 0{
            return
        }
        
        if lastLocation == nil || lastLocation!.horizontalAccuracy > newLocation.horizontalAccuracy {
            lastLocation = newLocation
            
            if newLocation.horizontalAccuracy <= manager.desiredAccuracy{
                stopLocationManager()
            }
        }
    }

viewDidLoad-MapViewcontroller.swift

override func viewDidLoad() {
        super.viewDidLoad()
        
        mapView.delegate = self

        for message in messages{
            
            let toUser = message["to_user"] as! String
            let fromUser = message["from_user"] as! String
            let title = "\(toUser) \(fromUser)"
            
            let coordinate = CLLocationCoordinate2DMake(message["latitude"] as! Double, message["longitude"] as! Double)
            
            let annotation = MessageAnnotation(coordinate: coordinate, title:title, subtitle:message["topic"] as! String)
            self.mapView.addAnnotation(annotation)
            
        }
        
    }

viewForAnnotation-MapViewController.swift

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
        if let _ = annotation as? MessageAnnotation
        {
            let reusableId = "MessengerAnnotationID"
            var pinAnnotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(reusableId) as? MKPinAnnotationView
            if pinAnnotationView == nil{
                pinAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reusableId)
                pinAnnotationView!.pinColor = MKPinAnnotationColor.Green
                pinAnnotationView!.canShowCallout = true
                
                let callOutButton = UIButton(type:.DetailDisclosure)
                pinAnnotationView!.rightCalloutAccessoryView = callOutButton
            }
            else{
                pinAnnotationView!.annotation = annotation
            }
            
            return pinAnnotationView
        }
        return nil
    }