Base64在React本机的“图像选取器库”中未定义

import { launchImageLibrary } from 'react-native-image-picker';

const options = {
  mediaType: 'photo',
  includeBase64: true, // 确保这一项设置为true
};

launchImageLibrary(options, (response) => {
  if (response.didCancel) {
    console.log('User cancelled image picker');
  } else if (response.error) {
    console.log('ImagePicker Error: ', response.error);
  } else {
    const source = { uri: 'data:image/jpeg;base64,' + response.uri };
    console.log(source);
  }
});

import { launchImageLibrary } from 'react-native-image-picker';
import RNFS from 'react-native-fs';

const options = {
  mediaType: 'photo',
};

launchImageLibrary(options, async (response) => {
  if (response.didCancel) {
    console.log('User cancelled image picker');
  } else if (response.error) {
    console.log('ImagePicker Error: ', response.error);
  } else {
    const imagePath = response.uri;
    const base64Data = await RNFS.readFile(imagePath, 'base64');
    const source = { uri: 'data:image/jpeg;base64,' + base64Data };
    console.log(source);
  }
});