     var lastTimeMessagesCount: Int = 0
 
     // 位于后台时收到的消息
-    private var inActiveNewMessageIDSet = Set<String>()
+    private var inactiveNewMessageIDSet = Set<String>()
 
     var conversationCollectionViewHasBeenMovedToBottomOnce = false
 


    private func tryInsertInActiveNewMessages() {

        if inActiveNewMessageIDSet.count > 0 {
            updateConversationCollectionViewWithMessageIDs(Array(inActiveNewMessageIDSet), messageAge: .New, scrollToBottom: false, success: { _ in
            })

            inActiveNewMessageIDSet = []

            println("insert inActiveNewMessageIDSet to CollectionView")
        }
    }



        } else {
            // 不然就先记下来
            inactiveNewMessageIDSet.unionInPlace(filteredMessageIDs)
            println("inactiveNewMessageIDSet: \(inactiveNewMessageIDSet)")
        }
    }

