NSNotification 通知が失敗し、指定したMapが表示されません。（日本地図が表示されます）
コードは以下の通りです。問題点を教えて頂けませんでしょうか。
よろしくお願いいたします。

《やりたいこと》
1.ViewController 条件分岐
2.NSTimer　→　3秒後に画面遷移を設定
　NSNotification　→　userInfoに数値データをもたせ、SecondViewControllerに通知を送る
3.SecondViewController 通知を受け取り、switchで受け取った数値を選択、Mapを表示させる

ViewController.swift

import UIKit

class ViewController: UIViewController {

  var timer:NSTimer = NSTimer()


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func didTouchAddButton(sender: AnyObject) {

  let randNum = Int(arc4random_uniform(5))

  if randNum == 0 {
     timer = NSTimer.scheduledTimerWithTimeInterval(3.0, target: self, selector: #selector(ViewController.changeView), userInfo: ["value": 0], repeats: false)

     let n : NSNotification = NSNotification(name: "dummy", object: self, userInfo: ["value": 0])
     NSNotificationCenter.defaultCenter().postNotification(n)


  }else if(randNum == 1){
    timer = NSTimer.scheduledTimerWithTimeInterval(3.0, target: self, selector: #selector(ViewController.changeView), userInfo: ["value": 1], repeats: false)

    let n : NSNotification = NSNotification(name: "dummy", object: self, userInfo: ["value": 1])
    NSNotificationCenter.defaultCenter().postNotification(n)

  //〜〜〜省略〜〜〜

  }else{
    timer = NSTimer.scheduledTimerWithTimeInterval(3.0, target: self, selector: #selector(ViewController.changeView), userInfo:  ["value": 100], repeats: false)

    let n : NSNotification = NSNotification(name: "dummy", object: self, userInfo: ["value": 100])
    NSNotificationCenter.defaultCenter().postNotification(n)
      }
}
func changeView() {
    self.performSegueWithIdentifier("toMap", sender: nil)
 }
}

SecondViewController.swift

import UIKit
import MapKit

class SecondViewController: UIViewController,MKMapViewDelegate {

@IBOutlet weak var mapView: MKMapView!


override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(false)

    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(SecondViewController.start) ,name: "dummy", object: nil)

}
    func start(notification: NSNotification) {
        if let userInfo = notification.userInfo {
            let result = userInfo["value"]! as! Int

    switch result {

    case 0:
        let coordinate = CLLocationCoordinate2DMake(33.590241, 130.421222)

        let span = MKCoordinateSpanMake(0.01, 0.01)

        let region = MKCoordinateRegionMake(coordinate, span)
        self.mapView.setRegion(region, animated: true)

        let annotation = MKPointAnnotation()
        annotation.coordinate = CLLocationCoordinate2DMake(33.590241, 130.421222)
        annotation.title = "Hakata Station"
        annotation.subtitle = "博多駅"
        self.mapView.addAnnotation(annotation)


    case 1:
        let coordinate = CLLocationCoordinate2DMake(34.985849, 135.758767)

        let span = MKCoordinateSpanMake(0.01, 0.01)

        let region = MKCoordinateRegionMake(coordinate, span)
        self.mapView.setRegion(region, animated: true)

        let annotation = MKPointAnnotation()
        annotation.coordinate = CLLocationCoordinate2DMake(34.985849, 135.758767)
        annotation.title = "Kyoto Station"
        annotation.subtitle = "京都駅"
        self.mapView.addAnnotation(annotation)

    //〜〜〜省略〜〜〜

    default:
        let coordinate = CLLocationCoordinate2DMake(43.068661, 141.350755)

        let span = MKCoordinateSpanMake(0.01, 0.01)

        let region = MKCoordinateRegionMake(coordinate, span)
        self.mapView.setRegion(region, animated: true)

        let annotation = MKPointAnnotation()
        annotation.coordinate = CLLocationCoordinate2DMake(43.068661, 141.350755)
        annotation.title = "Sapporo Station"
        annotation.subtitle = "札幌駅"
        self.mapView.addAnnotation(annotation)
      }
     }
    }
   }