Where do I create a new view controller for game center achievement list?

cocos2d-x C++
#1

All online tutorials say to make this function but I dont know where to put it and it gets a lot of errors.

void showAchievements()
{
    //if (hasGameCenter)
    GKAchievementViewController *achievements = [[GKAchievementViewController alloc] init];
    if (achievements != nil)
    {
        achievements.achievementDelegate = self;

        // Create an additional UIViewController to attach the GKAchievementViewController to
        UIViewController *myViewController = [[UIViewController alloc] init];

        // Add the temporary UIViewController to the main OpenGL view
        [[[CCDirector sharedDirector] openGLView] addSubview:myViewController.view];

        [myViewController presentModalViewController:achievements animated:YES];
    }
    [achievements release];
}

It doesn’t like the part about ‘self’. Sorry I’m new to obj-c so I’m having a hard time. I’m already authenticating the player properly and giving achievements I just cant get the achievement view to work. Thanks everyone.

#2

Did you use cocos2d-x?

#3

Yes I am using cocos2d-x

#4

// Add the temporary UIViewController to the main OpenGL view
[[[CCDirector sharedDirector] openGLView] addSubview:myViewController.view];

In cocos2d-x you can not use it like this, because CCDirector is a c*+ class.
May be you should learn how to mix use c*+ and object-c first.

#5

I’m already mixing c++ and obj-c using a .mm file but I don’t fully understand obj-c. Do you mind showing me how this code should be so I can learn from you? Thank you.

#6

You can refer CocosDenshion/iphone/SimpleAudioEngine.mm and CocosDenshion/include/SimpleAudionEngine.h.

#7

SimpleAudioEngine shows how to mix c++ and obj-c which I’m already doing fine. My issue is with the function listed in my original post. How can I rewrite the above function to work with cocos2d-x director?

#8

I put this in AppController.mm, and it seems to work. Is this a bad way to do it?

+ (void) ShowAchievements
{
    GKAchievementViewController *achievements = [[GKAchievementViewController alloc] init];

    if (achievements != nil)
    {
        //bool test = true;
        achievements.achievementDelegate = self;

        // Create an additional UIViewController to attach the GKAchievementViewController to
        myViewController = [[UIViewController alloc] init];

        cocos2d::CCDirector::sharedDirector()->purgeCachedData();

        // Add the temporary UIViewController to the main OpenGL view
        //[[[CCDirector sharedDirector] openGLView] addSubview:myViewController.view];
        EAGLView *view = [EAGLView sharedEGLView];
        [view addSubview:(myViewController.view)];

        [myViewController presentModalViewController:achievements animated:YES];
    }
    [achievements release];
}

+ (void)achievementViewControllerDidFinish:(GKAchievementViewController *)viewController
{
    [myViewController dismissModalViewControllerAnimated:YES];
    [myViewController release];
}
#9

This works, however while in the achievement view page if I tap around on the screen then close the window when my game returns to view the iPhone keyboard will pop up and wont go away. I have to restart the app to get rid of the keyboard. Does anyone know why this might be happening? Thanks a million!

1 Like
#10

this is how I did for leaderboard
First a OpenFeintCppBridge.m file with

#include 
#import 
#import "AppController.h"

void displayLeaderBoard(void)    
{    
    UIViewController    *tempVC;
    tempVC=[[UIViewController alloc] init];
    GKLeaderboardViewController *leaderboardController = [[[GKLeaderboardViewController alloc] init] autorelease];
    if (leaderboardController != nil)
    {
        UIApplication* clientApp = [UIApplication sharedApplication];
        UIWindow* topWindow = [clientApp keyWindow];
        if (!topWindow)
        {
            topWindow = [[clientApp windows] objectAtIndex:0];
        }
        [topWindow addSubview:tempVC.view];
        leaderboardController.leaderboardDelegate = (AppController *)[UIApplication sharedApplication].delegate;
        [tempVC presentModalViewController:leaderboardController animated: YES];
    }
}

OpenFeint-C-interface.h

#ifndef flying_panda_OpenFeint_C_interface_h
#define flying_panda_OpenFeint_C_interface_h
extern "C"
{
    void displayLeaderBoard(void);
}
#endif

in AppController.mm
add

- (void)leaderboardViewControllerDidFinish:(GKLeaderboardViewController *)LeaderboardViewController
{
    [LeaderboardViewController dismissModalViewControllerAnimated:YES];
}

in AppController.h
add the GKLeaderboardViewControllerDelegate protocole

When you want to popup leaderboard in your cpp files
#include “OpenFeint-C-interface.h”
displayLeaderBoard();

Got this inside OpenFeint last sdk
Using EAGLview missplace the view in my case

#11

Hmm, on the line where you set the .leaderboardDelegate I get an error…

Assigning to ‘id’ from incompatible type ‘AppController *’

#12

you probably forget to

in AppController.h
add the GKLeaderboardViewControllerDelegate protocole

#13

well after that you lose all touch event

#14

Fixed much simpler

void displayLeaderBoard(void)    
{    
    GKLeaderboardViewController *leaderboardController = [[[GKLeaderboardViewController alloc] init] autorelease];
    if (leaderboardController != nil)
    {
        UIApplication* clientApp = [UIApplication sharedApplication];


        UIWindow* topWindow = [clientApp keyWindow];
        if (!topWindow)
        {

            topWindow = [[clientApp windows] objectAtIndex:0];
        }
        leaderboardController.leaderboardDelegate = (AppController *)clientApp.delegate;
        [((AppController *)clientApp.delegate).getViewController presentModalViewController:leaderboardController animated: YES];
    }
}

and adding getViewController method to AppController.mm

-(RootViewController*)getViewController
{
    return viewController;
}
- (void)leaderboardViewControllerDidFinish:(GKLeaderboardViewController *)LeaderboardViewController
{
    [LeaderboardViewController dismissModalViewControllerAnimated:YES];
    [LeaderboardViewController becomeFirstResponder];
}

And in AppController.h

-(RootViewController*)getViewController;
#15

I still get Assigning to ‘id’ from incompatible type ‘AppController *’ error on this line:

leaderboardController.leaderboardDelegate = (AppController *)clientApp.delegate;

Weird thing is, I don’t even have any text boxes in my project so I have no idea why the keyboard even thinks it’s supposed to pop up in the first place.

#16

The only thing that comme to my mind is that you are missing GKLeaderboardViewControllerDelegate in
AppController.h

@class RootViewController;
#import 
#import 
@interface AppController : NSObject  {
    UIWindow *window;
    RootViewController  *viewController;
}
-(RootViewController*)getViewController;
@end
#17

Joseph - thanks for the help, you’ve solved my problem!

One thing though, what is the difference between putting a + or - before the function names? I’ve noticed that you get different results using each, and sometimes even errors, or callbacks that don’t get called. Is it a private/public type of identifier or something?

#18
  • is for normal method for a class
  • is for static method like in c++