Facebook openActiveSessionWithReadPermission reach completion too fast with status fail - objective-c

Question

[FBSession openActiveSessionWithReadPermissions:nil
allowLoginUI:YES
completionHandler:
^(FBSession *session,
FBSessionState state, NSError *error) {
[self sessionStateChanged:session state:state error:error];
}];
Well, after a while an alert show us saying that my application tries to access facebook and ask whether it's allowed or not.
However, that alert shows up AFTER completion handler is reached.
State is already FBSessionStateClosedLoginFailed by that time.
What should I do? Works fine in simulator.
Actually scrumptious sample in face book also fail on my iPhone. But I have facebook apps installed and logged in.

Answer 1

Facebook Login checklist:
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [FBSession.activeSession handleOpenURL:url];
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
// We need to properly handle activation of the application with regards to SSO
// (e.g., returning from iOS 6.0 authorization dialog or from fast app switching).
[FBSession.activeSession handleDidBecomeActive];
}
- (void)applicationWillTerminate:(UIApplication *)application {
// if the app is going away, we close the session object; this is a good idea because
// things may be hanging off the session, that need releasing (completion block, etc.) and
// other components in the app may be awaiting close notification in order to do cleanup
[FBSession.activeSession close];
}
In my sessionStateChanged: I am doing this
switch ( state ) {
case FBSessionStateOpen:
[[Facebook _instance] fbDialogLogin:session.accessToken expirationDate:session.expirationDate];
break;
case FBSessionStateClosed:
[FBSession.activeSession closeAndClearTokenInformation];
break;
case FBSessionStateClosedLoginFailed:
break;
default:
NSLog(#"FBSessionStateUnknown: %d", state);
break;
}
And dont forget to make sure that your FacebookAppID and BundleID is the same as the one you create in Facebook Developer Dashboard!