- (BOOL)openFBSessionWithAllowLoginUI:(BOOL)allowLoginUI
            withCompletionHandler:(void (^)())completionHandler
{
 
    NSArray *permissions = [NSArray arrayWithObjects:
                        @"user_photos",@"email",nil];
    return [FBSession openActiveSessionWithReadPermissions:permissions allowLoginUI:allowLoginUI completionHandler:^(FBSession *session,FBSessionState state,NSError *error) {
       if (error != nil) {
        ...
       } else {
            switch (state) {
               case FBSessionStateOpen:
               {
                   ...
               }
               case FBSessionStateClosed:
               {
                   ...
               }
               case FBSessionStateClosedLoginFailed:
               {
                   ...
               }
               default:
                   break;
           }
       }
   }];
}

以上工作正常登录.但是,当我使用以下代码注销时

[FBSession.activeSession closeAndClearTokenInformation];

这再次调用openActiveSessionWithReadPermissions的completionHandler：permission allowLoginUI :.这对我来说没有意义.我不认为这是正确的行为.有没有人看到这个问题？我们如何退出？我在iOS6上使用SDK 3.5.