How to implement Logout functionality for Facebook graph API

Question

I implemented Facebook Graph API in my iPhone App and I successfully post it in a wall. But each time I end my application and come back it stores my credentials (in Safari I guess as a cookie). It asks my permission with my previous credentials. But at this point I want my Facebook API should prompt for a new username and password login for requesting permission. In simple I want to logout of my Facebook when i select a button in my App.

score 2 · Answer 1 · answered Jul 17 '12 at 07:34

fbGraph.accessToken = nil;
NSHTTPCookie *cookie;
NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
for (cookie in [storage cookies])
{
    NSString *domainName = [cookie domain];
    NSRange domainRange = [domainName rangeOfString:@"facebook"];
    if(domainRange.length > 0)
    {
        [storage deleteCookie:cookie];
    }
}

score 1 · Accepted Answer · answered Jan 26 '11 at 04:54

1

How did you log in to facebook in the first place? If you are using facebook iOS SDK, you just basically have to call [facebook logout:self];. Otherwise if you're implementing Graph API yourself you just need to clear out your cookies and delete your access token.

answered Jan 26 '11 at 04:54

Enrico Susatyo

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you can check out this question: http://stackoverflow.com/questions/1852515/how-to-clear-cookies-from-nshttpcookiestorage-more-then-once – Enrico Susatyo Jan 26 '11 at 10:41
I can successfully log out from application. But safari remembers me. So I want totally logout from both my application and safari. How can I do it? – Burak Apr 07 '12 at 13:40
@Burak they have different cookies. You can't logout from the app and safari from the app. – Enrico Susatyo Apr 09 '12 at 00:11
Ok, then how can I login with different user? – Burak Apr 09 '12 at 10:46
The same way you previously log in. – Enrico Susatyo Apr 09 '12 at 12:42

score 1 · Answer 3 · answered Sep 15 '11 at 10:48

1

when you are call the facebook button at that method last line u wil write this method [facebook logout]

answered Sep 15 '11 at 10:48

Nag_iphone

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score 0 · Answer 4 · edited Sep 03 '13 at 13:34

0

NSHTTPCookieStorage* cookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];
        for (NSHTTPCookie* cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies])
        {
            [cookies deleteCookie:cookie];
        }

These codes are enough to implement logout functionality.

Its working perfectly on my app.

edited Sep 03 '13 at 13:34

Dilip Manek

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answered Apr 23 '12 at 13:42

ios developer

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How to implement Logout functionality for Facebook graph API

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