iOS show specific leaderboard Game Center

Question

How can I display an specific leaderboard in Game Center?

My code is:

    GKGameCenterViewController *gameCenterController = [[GKGameCenterViewController alloc] init];

    if (gameCenterController != nil)
    {
        gameCenterController.leaderboardIdentifier = @"leaderboard1";
        gameCenterController.gameCenterDelegate = self;
        gameCenterController.viewState = GKGameCenterViewControllerStateLeaderboards;

        [self presentViewController: gameCenterController animated: YES completion:nil];
    }

I want to display only "leaderboard1" but it displays all leaderboards. Leaderboard identifier name is correct.

Thanks