Xcode的臉書連接爲iPhone

我已經從GIT存儲庫下載了SDK。
我已經在我的Xcode 4.2項目中複製了/ SRC /。

我有這樣的代碼上AppDelegate.h

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

@class ViewController; 

@interface AppDelegate : UIResponder <UIApplicationDelegate,FBSessionDelegate> { 
    Facebook *facebook; 
} 

@property (strong, nonatomic) UIWindow *window; 
@property (strong, nonatomic) ViewController *viewController; 
@property (nonatomic, retain) Facebook *facebook; 

@end

我有AppDelegate.m此代碼

#import "AppDelegate.h" 
#import "ViewController.h" 

@implementation AppDelegate 

@synthesize window = _window; 
@synthesize viewController = _viewController; 
@synthesize facebook; 


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 

    self.window.rootViewController = self.viewController; 
    [self.window makeKeyAndVisible]; 

    facebook = [[Facebook alloc] initWithAppId:@"HERE_APP_ID" andDelegate:self]; 

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 

    if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) { 
     facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"]; 
     facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"]; 
    } 

    if (![facebook isSessionValid]) { 
     [facebook authorize:nil]; 
    } 

    return YES; 
} 

- (BOOL) application:(UIApplication *)application handleOpenURL:(NSURL *)url { 
    return [facebook handleOpenURL:url]; 
} 


-(void) fbDidLogin { 
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
    [defaults setObject:[facebook accessToken] forKey:@"FBAccessTokenKey"]; 
    [defaults setObject:[facebook expirationDate] forKey:@"FBExpirationDateKey"]; 
    [defaults synchronize]; 

}