Compile completes but simulator halts before anything displays.

func getRandomFact() -> String {
    let randomNumber =
        GKRandomSource.sharedRandom().nextIntWithUpperBound(facts.count)

    /*  Class that we are getting Random Number from
    //  is GKRandomSource.  Usually we create an
    //  instance here but we are not.  Instead we are
    //  going to DIRECTLY CALL A METHOD ON IT.  We do
    //  this with calling sharedRandom.  This is a
    //  CLASS METHOD OR A TYPE METHOD.  In this case
    //  it returns an instance.
    //  Note the dot ".".  This is because we are
    //  CHAINING METHODS.  Next one nextIntWith . . .
    //  nextIntWithUpperBound(10)
    //  This method accepts an upper bounds input.
    //  We are setting it at 10.  A better way is to
    //  dynamically set it with the use of the count
    //  property of all array.
    */


    return facts[randomNumber]
}

@IBOutlet weak var funFactLabel: UILabel!

let factModel = FactModel()

override func viewDidLoad() {
    super.viewDidLoad()
    funFactLabel.text = factModel.getRandomFact()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func showFunFact() {
    funFactLabel.text = factModel.getRandomFact()
}

var window: UIWindow?


func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    return true
}

func applicationWillResignActive(application: UIApplication) {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

func applicationDidEnterBackground(application: UIApplication) {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

func applicationWillEnterForeground(application: UIApplication) {
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

func applicationDidBecomeActive(application: UIApplication) {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

func applicationWillTerminate(application: UIApplication) {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}