React Native-useEffect内的函数集不工作

因此,我在useEffect中为两个uid设置了sendMessage函数:

初始化:

const [sendMessage, setSendMessage] = useState(() => () => {console.log("original")});

var sb;

     const sendbirdConnect = () => {
            /*setMessages([
        {
            user: {
            _id: uid,
            },
        },
        ]);*/
        sb = new SendBird({appId: "96483917-912B-47EE-9727-1C0D1EC38447", localCacheEnabled: false });   // The `localCacheEnabled` is optional.
        sb.connect(uid, function(user, error) {
            if (error) {
                // Handle error.
                console.log(error)
            }
            else
            {
                console.log("connected!")
            }
            // The user is connected to Sendbird server.
        });
        sb.GroupChannel.createChannelWithUserIds([uid,"Harry"], true, uid, null, null, function(groupChannel, error) {
            if (error) {
                // Handle error.
                console.log(error);
            }
            else
            {
                console.log("channel created!");
                console.log(groupChannel.url);
                console.log(groupChannel);
            }
            // A group channel of the specified users is successfully created.
            // Through the "groupChannel" parameter of the callback function,
            // you can get the group channel's data from the result object that Sendbird 
            getMessages(groupChannel);
            setSendMessage((params) => (params) => {
                groupChannel.sendUserMessage(params, function(message, error) {
                    if (error) {
                        // Handle error.
                        console.log(error);
                    }
                    else
                    {
                        console.log("message sent!")
                    }
                    // The message is successfully sent to the channel.
                    // The current user can receive messages from other users through the onMessageReceived() method of an event handler.
                });
            });
        });
    
    }
    useEffect(() => {
        getUId();
        //sendbirdConnect();
    },[]);
    useEffect(() => {
        sendbirdConnect();
    }, [uid]);

带GiftedChat的Onsend功能:

    const onSend = useCallback((messages = []) => {
        const params = new sb.UserMessageParams();
        params.message = messages[0].text;
        let message = messages[0]
        let data = {
            "_id": message["_id"], 
            "createdAt": message.createdAt, 
            "user": {"_id": message.user["_id"]}
        }
        data = JSON.stringify(data);
        params.data = data;
        //const sendMessageNow = () => { sendMessage(params) }
        //sendMessageNow();
        sendMessage(params);
        setMessages(previousMessages => GiftedChat.append(previousMessages, messages));
    }, []);

现在其他一切都正常了,用户与sendbird连接,并加载了以前的消息(getMessages),但sendMessage只有在我保存文件并metro重新加载它时才有效。