Question

I have the following code:

    - (void)startGameWithBlock:(void (^)(Game *))block
{
    GameViewController *gameViewController = [[GameViewController alloc] initWithNibName:@"GameViewController" bundle:nil];
    gameViewController.delegate = self;

    [self presentViewController:gameViewController animated:NO completion:^
    {
        Game *game = [[Game alloc] init];
        gameViewController.game = game;
        game.delegate = gameViewController;
        block(game);
    }];

}

Which allocate the GameViewController
present it, and then allocate the Game object.
Finally, it calls your block to do the game-type specific initializations

I have read about Blocks and It is fire the block after the gameviewcontroller loadView
I want the code run in the same way as it is now but with out present the view please help

Answer 1

If I understand you right, you simply do not want to present the gameViewController. So you want to do this:

- (void)startGameWithBlock:(void (^)(Game *))block
{
    GameViewController *gameViewController = [[GameViewController alloc] initWithNibName:@"GameViewController" bundle:nil];
    gameViewController.delegate = self;

    Game *game = [[Game alloc] init];
    gameViewController.game = game;
    game.delegate = gameViewController;
    block(game);
}

There are two issues with this.

1. As soon as you leave this function, there is no hard reference to your gameViewController so it would be deallocated again. You could solve this by defining a property in whatever view controller self refers to and assigning to that.
2. Your block-call could include code that depends on gameViewController to be shown. If this is not the case, you should be fine.

Hope this helps.