Question

I am executing the following code to logout of Facebook from my iPhone application:

if ([mFacebook isSessionValid]) {
    [mFacebook logout];
}

This code runs successfully and the delegate is called after this in which I am clearing the access token:

- (void)fbDidLogout 
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults removeObjectForKey:@"FBAccessTokenKey"];
    [defaults removeObjectForKey:@"FBExpirationDateKey"];
    [defaults synchronize];
}

But when I again log in to Facebook, it does not ask for username and password.

What am I doing wrong?

Answer 1

Are you using FB mobile Login Dialog? In Facebook.m, add the following code to remove cookies at m.facebook.com domain.

- (void)invalidateSession {

   ...
    NSArray* facebookMCookies = [cookies cookiesForURL:
                                [NSURL URLWithString:@"https://m.facebook.com"]];

    for (NSHTTPCookie* cookie in facebookMCookies) {
        [cookies deleteCookie:cookie];
    }

  ...
}