所以，我面临着一个问题，当我导航到我的扫描仪屏幕，并返回到前一个屏幕，然后再次导航到我的扫描仪屏幕，条形码扫描仪不工作.甚至控制台日志不工作.我必须清除现金和所有数据从博览会应用程序，以便再次工作扫描仪屏幕.我真的不知道是什么原因造成的问题，但高度怀疑导航.有人能帮助我请？我添加我的扫描仪屏幕右下方。

import React, { useState, useEffect } from "react";
import {
  Text,
  View,
  FlatList,
  Button,
  Modal,
  Pressable,
  Alert,
  StyleSheet,
} from "react-native";
import { BarCodeScanner } from "expo-barcode-scanner";
import axios from "axios";
import { localIP, ngrokServer } from "../constants";
import allStyles from "../components/molecules/Styles";

const styles = allStyles;

export default function ScannerScreen({ navigation }) {
  const [hasPermission, setHasPermission] = useState(null);
  const [scanned, setScanned] = useState(false);

  useEffect(() => {
    setReset(false);
  });

  useEffect(() => {
    (async () => {
      const { status } = await BarCodeScanner.requestPermissionsAsync();
      setHasPermission(status === "granted");
    })();
  }, []);

  const handleBarCodeScanned = async ({ type, data }) => {
    setScanned(true);
    console.log("Data: ", data);
  };

  if (hasPermission === null) {
    return <Text>Requesting for camera permission</Text>;
  }
  if (hasPermission === false) {
    return <Text>No access to camera</Text>;
  }

  return (
    <View style={styles.scannerScreenContainer}>
      <BarCodeScanner
        onBarCodeScanned={scanned ? undefined : handleBarCodeScanned}
        style={StyleSheet.absoluteFillObject}
      />
      {scanned && reset && (
        <Button title={"Tap to Scan Again"} onPress={() => setScanned(false)} />
      )}
      
    </View>
  );
}

字符串
我正在使用axios.post，并认为这可能是问题的原因，但当我删除该代码块并再次运行时，它不扫描QR码。