因此，我想根据我的react native应用程序中的登录用户访问配置文件名称。这里的问题是，即使我可以访问suer文档，我也无法访问其中的数据。

import React, { useState, useEffect } from 'react';
import { View, Text, StyleSheet } from 'react-native';
import { app, auth } from '../firebaseconfig';
import { getFirestore, doc, getDoc } from 'firebase/firestore';
const db = getFirestore(app);
const MainPage = () => {
  const [userName, setUserName] = useState('');
  useEffect(() => {
    const fetchUserData = async () => {
      try {
        const user = auth.currentUser;
        console.log('current user UID is:', user.uid);
    
        if (user) {
          const userDocRef = doc(db, 'users', user.uid);
          console.log('The doc is:', userDocRef);
    
          const userDocSnapshot = await getDoc(userDocRef);
          console.log('User document:', userDocSnapshot);
    
          if (userDocSnapshot) {
            console.log('User document exists:', userDocSnapshot.data());
            
            // Check if userData and userData.name exist before setting the state
            const userData = userDocSnapshot.data();
            if (userData && 'name' in userData) {
              setUserName(userData.name);
              console.log('Name property found:', userData.name);
            } else {
              console.log('Name property not found in user data');
            }
          } else {
            console.log('User document does not exist in Firestore');
          }
        }
      } catch (error) {
        console.error('Error fetching user data:', error);
      }
    };
    
    fetchUserData();
  }, []);
  return (
    <View style={styles.container}>
      <Text style={styles.text}>Hello, {userName}</Text>
    </View>
  );
};
const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  text: {
    fontSize: 20,
    fontWeight: 'bold',
  },
});
export default MainPage;

日志

LOG  current user UID is: 4sXptgVpAgUSh8jILHuv45R8fiz1
 LOG  The doc is: {"_key": {"path": {"len": 2, "offset": 0, "segments": [Array]}}, "converter": null, "firestore": {"app": [FirebaseAppImpl], "databaseId": [DatabaseId], "settings": [FirestoreSettingsImpl]}, "type": "document"}   
 LOG  User document: {"_converter": null, "_document": null, "_firestore": {"app": [FirebaseAppImpl], "databaseId": [DatabaseId], "settings": [FirestoreSettingsImpl]}, "_firestoreImpl": {"app": [FirebaseAppImpl], "databaseId": [DatabaseId], "settings": [FirestoreSettingsImpl]}, "_key": {"path": {"len": 2, "offset": 0, "segments": [Array]}}, "_userDataWriter": {"firestore": [Object]}, "metadata": {"fromCache": false, "hasPendingWrites": false}}
 LOG  User Data: undefined
 LOG  Name property not found in user data

1.重新配置Firestore规则，以确保它们允许基于用户的UID进行读取访问。
1.控制台已记录代码以检查为什么我无法访问数据。