title: Adding a button to MKPointAnnotation?
body: <p>I just wrote few lines of code and got stuck trying add a detail button to my annotation point, I don't know how. Does anyone know how to do that? The image below shows what I want to achieve. Thanks! </p>
  
  <p><a href="http://i.stack.imgur.com/kK1Ox.jpg" rel="nofollow">http://i.stack.imgur.com/kK1Ox.jpg</a></p>
  
  <p>Im trying to get the big i in the circle in my annotation.</p>
  
  <p>Right now I just have an annotation with a title and a subtitle, which looks like below.</p>
  
  <p><a href="http://imgur.com/L3VMe5l.png" rel="nofollow">http://imgur.com/L3VMe5l.png</a></p>
  
  <p>Also, if you know, when a user clicks on the i in the circle, how do i bring them to a new segue?</p>
  
  <p>Thanks for your help.</p>
  
  <pre><code>import UIKit
  import MapKit
  
  class PropertyMasterViewConroller: UIViewController, MKMapViewDelegate {
  
  
      @IBOutlet weak var nMapView: MKMapView!
      @IBOutlet weak var testButton: UIButton!
  
      override func viewDidLoad() {
          super.viewDidLoad()
  
          //Location of Boston College
          let initLocation = CLLocationCoordinate2D(
              latitude: 42.335992,
              longitude: -71.167333
          )
          //Span of the Map
          let span = MKCoordinateSpanMake(0.1, 0.1)
          let region = MKCoordinateRegion(center: initLocation, span: span)
          nMapView.setRegion(region, animated: true)
  
          addAnnotations()
  
          testButton.setTitle("Test Button", forState: .Normal)
  
      }
  
      override func viewWillAppear(animated: Bool) {
          super.viewWillAppear(animated)
          self.navigationController?.navigationBar.setBackgroundImage(UIImage(named:"nav.png"), forBarMetrics: .Default)
          self.navigationController?.navigationBar.shadowImage = UIImage()
          self.navigationController?.navigationBar.translucent = true
      }
  
      // When user taps on the disclosure button you can perform a segue to navigate to another view controller
      func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
          if control == view.rightCalloutAccessoryView{
              println(view.annotation.title) // annotation's title
              println(view.annotation.subtitle) // annotation's subttitle
  
              //Perform a segue here to navigate to another viewcontroller
              // On tapping the disclosure button you will get here
          }
      }
  
      // Here we add disclosure button inside annotation window
      func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -&gt; MKAnnotationView! {
  
          println("viewForannotation")
          if annotation is MKUserLocation {
              //return nil
              return nil
          }
  
          let reuseId = "pin"
          var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
  
          if pinView == nil {
              //println("Pinview was nil")
              pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
              pinView!.canShowCallout = true
              pinView!.animatesDrop = true
          }
  
          var button = UIButton.buttonWithType(UIButtonType.DetailDisclosure) as UIButton // button with info sign in it
  
          pinView?.rightCalloutAccessoryView = button
  
  
          return pinView
      }
  
      func addAnnotations() -&gt; Void {
  
          let annotationView = MKAnnotationView()
          let detailButton: UIButton = UIButton.buttonWithType(UIButtonType.DetailDisclosure) as UIButton
          annotationView.rightCalloutAccessoryView = detailButton
  
  
          //1070 Beacon
          let annotation = MKPointAnnotation()
          annotation.setCoordinate(CLLocationCoordinate2D (latitude: 42.345532,longitude: -71.109526))
          annotation.title = "1070 Beacon Street"
          annotation.subtitle = "Brookline, MA 02446"
          nMapView.addAnnotation(annotation)
  
          //1070 Beacon
          let location_18 = MKPointAnnotation()
          location_18.setCoordinate(CLLocationCoordinate2D (latitude: 42.347236,longitude: -71.15000))
          location_18.title = "18 Shepard Street"
          location_18.subtitle = "Brighton, MA 02135"
          nMapView.addAnnotation(location_18)
  
  
          //1070 Beacon
          let location_26 = MKPointAnnotation()
          location_26.setCoordinate(CLLocationCoordinate2D (latitude: 42.358663,longitude: -71.146024))
          location_26.title = "26 Lincoln Street"
          location_26.subtitle = "Brighton, MA 02135"
          nMapView.addAnnotation(location_26)
  
          //1070 Beacon
          let location_1280 = MKPointAnnotation()
          location_1280.setCoordinate(CLLocationCoordinate2D (latitude: 42.363639,longitude: -71.139366))
          location_1280.title = "1280 Soldiers Field Road"
          location_1280.subtitle = "Brighton, MA 02135"
          nMapView.addAnnotation(location_1280)
  
          //1070 Beacon
          let location_59 = MKPointAnnotation()
          location_59.setCoordinate(CLLocationCoordinate2D (latitude: 42.363147,longitude: -71.201493))
          location_59.title = "59-85 Chapel Street"
          location_59.subtitle = "Newton, MA 02458"
          nMapView.addAnnotation(location_59)
  
          //1070 Beacon
          let location_1 = MKPointAnnotation()
          location_1.setCoordinate(CLLocationCoordinate2D (latitude: 42.309260,longitude: -71.134556))
          location_1.title = "1 Newton Place"
          location_1.subtitle = "Newton, MA 02458"
          nMapView.addAnnotation(location_1)
      }
  }
  </code></pre>