Open facebook post/pageurl with facebook session within app in uiwebview

Question

I am using latest Facebook iOS Sdk for Facebook integration. I am able to perform login and graph api/FQL operation very well. But now I want to open Facebook post/pageurl with facebook session within app in UIWebView after login. So, anyone know how to do it?

Answer 1

To do this you have to force Facebook webView login

// Initialize a session object
FBSession *session = [[FBSession alloc] init];
// Set the active session
[FBSession setActiveSession:session];
// Open the session
[session openWithBehavior: FBSessionLoginBehaviorForcingWebView
        completionHandler:^(FBSession *session,
                            FBSessionState status,
                            NSError *error) {
            // Respond to session state changes, 
            // ex: updating the view
        }];

The webView based login will add some login cookies to your app (cookies manager)

Next: When you open post in webView load the cookies:

// req is NSURLRequest that you pass to your UIWebView
// this code should be before loading the UIWebView
NSArray *cooks = [[NSHTTPCookieStorage sharedHTTPCookieStorage]cookiesForURL:req.URL];
[self addCookies:cooks forRequest:req];

Here is the implementation for addCookies:forRequest:

- (void)addCookies:(NSArray *)cookies forRequest:(NSMutableURLRequest *)request
{
    if ([cookies count] > 0)
    {
        NSHTTPCookie *cookie;
        NSString *cookieHeader = nil;
        for (cookie in cookies)
        {
            if (!cookieHeader)
            {
                cookieHeader = [NSString stringWithFormat: @"%@=%@",[cookie name],[cookie value]];
            }
            else
            {
                cookieHeader = [NSString stringWithFormat: @"%@; %@=%@",cookieHeader,[cookie name],[cookie value]];
            }
        }
        if (cookieHeader)
        {
            [request setValue:cookieHeader forHTTPHeaderField:@"Cookie"];
        }
    }
}