My view controller does not load with Game Center - ios

Question

I am following a tutorial doing a Game Center Turn-based match, tic-tac-toe game, and my view controller is not loaded. It works when i use the source code but not with the code i have typed myself, from the book. I have checked and cant find any difference.
I do get into Game Center and when i click on "Play your turn" it loads the initial screen with the button "Begin game" and not, as the original code, the "tictactoeGameViewController" as it suppose to.
I would very much appreciate if someone could help me out here :-)
Here is my code:
#import "ViewController.h"
#import "tictactoeGameViewController.h"
#interface ViewController ()
#end
#implementation ViewController
-(IBAction)beginGame:(id)sender {
GKMatchRequest *match = [[GKMatchRequest alloc]init];
[match setMaxPlayers:2];
[match setMinPlayers:2];
GKTurnBasedMatchmakerViewController *tmvc = nil;
tmvc = [[GKTurnBasedMatchmakerViewController alloc]initWithMatchRequest:match];
[tmvc setTurnBasedMatchmakerDelegate:self];
[self presentModalViewController:tmvc animated:YES];
[tmvc release];
[match release];
}
- (void)viewDidLoad {
[super viewDidLoad];
if ([GameCenterManager isGameCenterAvailable]) {
[[NSNotificationCenter defaultCenter]addObserver:self selector:#selector(localUserAuthenticationChanged:) name:GKPlayerAuthenticationDidChangeNotificationName object:nil];
gcManager = [[GameCenterManager alloc]init];
[gcManager setDelegate:self];
[gcManager authenticateLocalUser];
}
}
-(void)processGameCenterAuthentication:(NSError *)error {
if (error != nil) {
NSLog(#"An error occured during authentication: %#", [error localizedDescription]);
}
}
-(void)localUserAuthenticationChanged:(NSNotification *)notif {
NSLog(#"Authentication Changed: %#", notif.object);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - GCTurnBasedMatchHelperDelegate
-(void)turnBasedMatchmakerViewController:(GKTurnBasedMatchmakerViewController *)viewController didFindMatch:(GKTurnBasedMatch *)match {
[self dismissModalViewControllerAnimated:YES];
tictactoeGameViewController *gameVC = [[tictactoeGameViewController alloc]init];
gameVC.match = match;
[[self navigationController]pushViewController:gameVC animated:YES];
[gameVC release];
}
-(void)turnBasedMatchmakerViewController:(GKTurnBasedMatchmakerViewController *)viewController playerQuitForMatch:(GKTurnBasedMatch *)match {
[match participantQuitOutOfTurnWithOutcome:GKTurnBasedMatchOutcomeQuit withCompletionHandler:^(NSError *error) {
if (error) {
NSLog(#"An error occured ending match: %#", [error localizedDescription]);
}
}];
}
-(void)turnBasedMatchmakerViewController:(GKTurnBasedMatchmakerViewController *)viewController didFailWithError:(NSError *)error {
NSLog(#"Turned Based Matchmaker Failed with Error: %#", [error localizedDescription]);
}
-(void)turnBasedMatchmakerViewControllerWasCancelled:(GKTurnBasedMatchmakerViewController *)viewController {
[self dismissModalViewControllerAnimated:YES];
}
#end

Answer 1

I did find the solution:
The ViewController must be RootViewController so i changed:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil] autorelease];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
To:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *controller = [[ViewController alloc] init];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:controller];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}