[cocos2d Advent Calendar 2011]FacebookのOAuth認証のライブラリ「Facebook Connect」をcocos2dで使用する方法（サンプル付き）

//
//  AppDelegate.h
//  untitled
//

#import <UIKit/UIKit.h>
#import "FBConnect.h"

//facebook
#define kFBAppId                    @"xxxxx"                    //REPLACE ME
#define kFBAppSecret                @"xxxxx"                //REPLACE ME

@class RootViewController;

@interface AppDelegate : NSObject <uiapplicationDelegate, FBRequestDelegate, FBDialogDelegate, FBSessionDelegate> {
	UIWindow			*window;
	RootViewController	*viewController;

    //facebook
    Facebook* _facebook;
    NSArray* _permissions;
    NSNumber *facebookState;//0,1,2 でログイン状態をメモログイン前、ログイン後、つぶやき終了
}

@property (nonatomic, retain) UIWindow *window;
@property (nonatomic, retain) Facebook *_facebook;
-(NSNumber *) facebook:(NSString*)s;

@end

//facebook
-(NSNumber *) facebook:(NSString*)s
{
    if(!facebookState) facebookState = [[NSNumber alloc] initWithInt:0];

    if(s == @"logout") {//ログアウトの場合
        [_facebook logout:self];
        facebookState = [[NSNumber alloc] initWithInt:0];
        return facebookState;
    }

    if([facebookState intValue] == 2) return facebookState;

    //状態取得したい時
    if(s == @"") {
        if(_facebook && _facebook.isSessionValid==YES) {
            facebookState = [[NSNumber alloc] initWithInt:1];
        } else {
            facebookState = [[NSNumber alloc] initWithInt:0];
        }
        return facebookState;
    }

    //実行関連
    if([facebookState intValue] == 0) {//ログインの場合
        [self facebookAccountLogin];
    } else if([facebookState intValue] == 1) {//投稿
        [self postfacebook:s];
        facebookState = [[NSNumber alloc] initWithInt:2];
    }

    return facebookState;
}

-(void) facebooktReset
{
    facebookState = [[NSNumber alloc] initWithInt:0];
}