游戏中心排行榜：新分数不会立即显示

Question

我有以下代码报告得分并显示排行榜。一切似乎都没问题但是当我发送新的更新分数时，除非我点击挑战标签或所有时间，否则它不会在排行榜上显示分数。基本上，它需要我点击排行榜内的其他内容，以便排行榜可以刷新并显示最新的分数。

func reportLeaderboardIdentifier(identifier: String, score: Int) {
    let scoreObject = GKScore(leaderboardIdentifier: identifier)
    scoreObject.value = Int64(score)
    GKScore.reportScores([scoreObject]) { (error) -> Void in
        if error != nil {
            println("Error in reporting leaderboard scores: \(error)")
        }
    }
}
func displayLeaderboard () {
    var gameCenterController: GKGameCenterViewController = GKGameCenterViewController()
    gameCenterController.viewState = GKGameCenterViewControllerState.Leaderboards
    gameCenterController.gameCenterDelegate = self
    self.vc.presentViewController(gameCenterController, animated: true , completion:nil)
}

func gameCenterViewControllerDidFinish(gameCenterViewController: GKGameCenterViewController!) {
    gameCenterViewController.dismissViewControllerAnimated(true, completion: nil)
}