Game Center in tvOS not showing up - swift

Question

I currently have Game Center working in my iOS target, but not working in the tvOS target.
I've already added the Leaderboard images and placed the identifier in Xcode here:
This is the class that I'm using to bring up the leaderboard and initiate the player. It's called GameKitHelper.swift:
import UIKit
import Foundation
import GameKit
let PresentAuthenticationViewController = "PresentAuthenticationViewController"
class GameKitHelper: NSObject {
static let sharedInstance = GameKitHelper()
var authenticationViewController: UIViewController?
var gameCenterEnabled = false
func authenticateLocalPlayer() {
//1
let localPlayer = GKLocalPlayer()
localPlayer.authenticateHandler = {(viewController, error) in
if viewController != nil {
//2
self.authenticationViewController = viewController
NSNotificationCenter.defaultCenter().postNotificationName(PresentAuthenticationViewController, object: self)
}
else if error == nil {
//3
self.gameCenterEnabled = true
}
}
}
func reportAchievements(achievements: [GKAchievement], errorHandler: ((NSError?)->Void)? = nil) {
guard gameCenterEnabled else {
return
}
GKAchievement.reportAchievements(achievements, withCompletionHandler: errorHandler)
}
func showGKGameCenterViewController(viewController: UIViewController) {
guard gameCenterEnabled else {
return
}
//1
let gameCenterViewController = GKGameCenterViewController()
//2
gameCenterViewController.gameCenterDelegate = self
//3
viewController.presentViewController(gameCenterViewController, animated: true, completion: nil)
}
func saveHighScore(identifier: String, score: Int) {
if (GKLocalPlayer.localPlayer().authenticated) {
let scoreReporter = GKScore(leaderboardIdentifier: identifier)
scoreReporter.value = Int64(score)
let scoreArray:[GKScore] = [scoreReporter]
GKScore.reportScores(scoreArray, withCompletionHandler: {
error -> Void in
if (error != nil) {
print("error")
}
else {
print("Posted score of \(score)")
}
})
}
}
}
extension GameKitHelper: GKGameCenterControllerDelegate {
func gameCenterViewControllerDidFinish(gameCenterViewController: GKGameCenterViewController) {
gameCenterViewController.dismissViewControllerAnimated(true, completion: nil)
}
}
NavigationController class:
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self,
selector: Selector("showAuthenticationViewController"),
name: PresentAuthenticationViewController,
object: nil)
GameKitHelper.sharedInstance.authenticateLocalPlayer()
}
func showAuthenticationViewController() {
let gameKitHelper = GameKitHelper.sharedInstance
if let authenticationViewController = gameKitHelper.authenticationViewController {
topViewController?.presentViewController(authenticationViewController,
animated: true,
completion: nil)
}
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}

Answer 1

Make sure you have an "Apple TV Dashboard Image" in your app's asset catalog. The dashboard artwork should be 923x150 with transparency, and it doesn't need to be layered since the user can't select it.
The tvOS Human Interface Guidelines claim that the dashboard artwork is optional, but in my experience GKGameCenterViewController will refuse to appear if you don't have one.