#import
    #import"FBConnect.h"

    @interface yAppDelegate : UIResponder
    {
        Facebook *facebook;

    }

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

    @end

    #import"yAppDelegate.h"
    #import"yViewController.h"

    static NSString* kAppId = @"350435425024264";

    @implementation yAppDelegate

    @synthesize window = _window;
    @synthesize facebook;

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
    {    
        yViewController *viewController = [[yViewController alloc] init];

        facebook = [[Facebook alloc] initWithAppId:kAppId andDelegate:viewController];

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

        return YES;
    }

    - (void)applicationDidBecomeActive:(UIApplication *)application {
        [[self facebook] extendAccessTokenIfNeeded];
    }

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

    - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
        return [self.facebook handleOpenURL:url];
    }

    #import
    #import"FBConnect.h"

    @interface yViewController : UIViewController
    {
        NSArray *permissions;
    }

    @property (nonatomic, retain) NSArray *permissions;

    @end

    #import"yViewController.h"
    #import"yAppDelegate.h"
    #import"FBConnect.h"

    @interface yViewController ()
    @end

    @implementation yViewController
    @synthesize permissions;

    - (IBAction)buttonPressed:(UIButton *)sender {

        NSLog(@"Button pressed!");

        permissions = [[NSArray alloc] initWithObjects:@"offline_access", nil];

        yAppDelegate *delegate = (yAppDelegate *)[UIApplication sharedApplication].delegate;
        if (![[delegate facebook] isSessionValid]) {
            [[delegate facebook] authorize:permissions];
        } else {
            //[self showLoggedIn];
        }
        NSLog(@"login!!");

    }


    - (void)viewDidLoad
    {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
    }

    - (void)viewDidUnload
    {
        [super viewDidUnload];
        // Release any retained subviews of the main view.
    }

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
    }

    #pragma mark - FBSessionDelegate Methods
    /**
     * Called when the user has logged in successfully.
     */
    - (void)fbDidLogin {
        NSLog(@"did login");
    }

    -(void)fbDidExtendToken:(NSString *)accessToken expiresAt:(NSDate *)expiresAt {
        NSLog(@"token extended");
    }

    /**
     * Called when the user canceled the authorization dialog.
     */
    -(void)fbDidNotLogin:(BOOL)cancelled {
        NSLog(@"fbDidNotLogin");
    }

    /**
     * Called when the request logout has succeeded.
     */
    - (void)fbDidLogout {

        NSLog(@"fbDidLogout");

        // Remove saved authorization information if it exists and it is
        // ok to clear it (logout, session invalid, app unauthorized)
        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
        [defaults removeObjectForKey:@"FBAccessTokenKey"];
        [defaults removeObjectForKey:@"FBExpirationDateKey"];
        [defaults synchronize];

    }

    /**
     * Called when the session has expired.
     */
    - (void)fbSessionInvalidated {

        NSLog(@"fbSessionInvalidated");

        [self fbDidLogout];
    }

    #pragma mark - FBRequestDelegate Methods
    /**
     * Called when the Facebook API request has returned a response.
     *
     * This callback gives you access to the raw response. It's called before
     * (void)request:(FBRequest *)request didLoad:(id)result,
     * which is passed the parsed response object.
     */
    - (void)request:(FBRequest *)request didReceiveResponse:(NSURLResponse *)response {
        //NSLog(@"received response");
    }

    /**
     * Called when a request returns and its response has been parsed into
     * an object.
     *
     * The resulting object may be a dictionary, an array or a string, depending
     * on the format of the API response. If you need access to the raw response,
     * use:
     *
     * (void)request:(FBRequest *)request
     *      didReceiveResponse:(NSURLResponse *)response
     */
    - (void)request:(FBRequest *)request didLoad:(id)result {
        NSLog(@"-(void)request");
    }

    /**
     * Called when an error prevents the Facebook API request from completing
     * successfully.
     */
    - (void)request:(FBRequest *)request didFailWithError:(NSError *)error {
        NSLog(@"Err message: %@", [[error userInfo] objectForKey:@"error_msg"]);
        NSLog(@"Err code: %d", [error code]);
    }

@end