Ogre & Gamecenter - Problem with presentModalViewController

[azrialelf]

Hey Guys!
I'm trying to update my game with Game Center support and I've come across an error that ventures outside my area of expertise. I'm simply trying to load the GameCenter Leaderboards and Achievements, using Masterfalcon's sample project.
Here is the code to load the GameCenter views, straight from Apple's guide http://developer.apple.com/library/ios/ ... 04-CH6-SW9

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KLeaderboardViewController *leaderboardController = [[GKLeaderboardViewController alloc] init];
    if (leaderboardController != nil)
    {
        leaderboardController.leaderboardDelegate = self;
        [self presentModalViewController: leaderboardController animated: YES];
    }

The error I get is:

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2012-08-11 21:17:12.642 DeadmansRun[2805:707] -[AppDelegate presentModalViewController:animated:]: unrecognized selector sent to instance 0x1ce5ff80
2012-08-11 21:17:12.645 DeadmansRun[2805:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[AppDelegate presentModalViewController:animated:]: unrecognized selector sent to instance 0x1ce5ff80'

I searched as much as I could but the best help I could find was "You cannot use presentModalViewController:animated: directly from an AppDelegate. It must be presented from an instance of UIViewController. This is the cause of the error." - It's helpful but unfortunately I don't know objective C well enough to be able to implement a fix.

I realize this isn't really an Ogre problem, but it's a problem I'm having trying to use Ogre so I was hoping one of you programming gurus could provide some insight!

[masterfalcon]

Yeah sounds like you need to call that from an UIViewController subclass. You may be able to attach it to the view controller that Ogre creates(in 1.8 only). Use the getCustomAttribute function to get the "VIEWCONTROLLER" attribute from your window instance.

[azrialelf]

Yeah sounds like you need to call that from an UIViewController subclass. You may be able to attach it to the view controller that Ogre creates(in 1.8 only). Use the getCustomAttribute function to get the "VIEWCONTROLLER" attribute from your window instance.

So - I should create a UIViewController subclass, attach it to .... my main window?
And then replace the 'self' in the Apple provided gamecenter code with the UIViewController object?

[masterfalcon]

You could either create your own or use the one that Ogre already makes and retrieve a pointer to it using getCustomAttribute. If you create your own you will need to inform Ogre of it when the window is created by passing it in the miscParams argument.

[azrialelf]

I'm using 1.7, will that still work?

[masterfalcon]

No, view controller support was added in 1.8.

[Igor Gedymin]

I found a solution for 1.7.3

1. Add class UIViewController to your project (check XIB in wizard)
2. Get params "WINDOW" and "VIEW" from render window:

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unsigned long hWnd = 0;
m_pRenderWnd->getCustomAttribute("WINDOW", &hWnd);
    
unsigned long hView = 0;
m_pRenderWnd->getCustomAttribute("VIEW", &hView);

these are UIWindow and UIView.

3. Then create UIViewController instance and assign:

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mainWindow = (UIWindow*) hWnd;
mainView = (UIView*) hView;
rootViewController = [[MyViewController alloc] initWithNibName:@"MyViewController" bundle:nil];
rootViewController.view = mainView;
mainWindow.rootViewController = rootViewController;

Now, you can use rootViewController for Game Center
4. [rootViewController presentModalViewController: leaderboardController animated: YES];

[azrialelf]

Wow - Thanks Igor! I'm excited to try this out!

[azrialelf]

Ok I gave it a shot - Here's my implementation:

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- (void)go {
	
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    
    //Creates Ogre framework
    //This handles input and the 'main loop'
    new OgreFramework();
    if(!OgreFramework::getSingletonPtr()->initOgre("Deadman's Run v1.0",
												   &game, 0))
		return;
    
    //NEW OGRECODE as per FORUMS
    unsigned long hWnd=0;
    OgreFramework::getSingletonPtr()->m_pRenderWnd->getCustomAttribute("WINDOW", &hWnd);
    
    unsigned long hView=0;
    OgreFramework::getSingletonPtr()->m_pRenderWnd->getCustomAttribute("VIEW", &hView);
    
    window = (UIWindow*) hWnd;
    gameView = (UIView*) hView;
    //mainVC = [[MyViewController alloc] initWithNibName:@"MyViewController" bundle:nil];
    mainVC=[[UIViewController alloc] init];
    mainVC.view=gameView;
    window.rootViewController= mainVC;
    

However, here is the result:


If I put the code after the first frame is rendered, the result changes, but is still wrong.
If I take this code block out, it goes back to working normally.

Any ideas?