react native vision camera拍照上传到本地服务器

要在React Native中使用Vision Camera拍照并将照片上传到本地服务器，你需要按以下步骤操作：

1. 安装必要的库：

npm install react-native-vision-camera
npm install axios

2. 使用Vision Camera拍照并获取图片路径。
3. 使用axios将图片上传到本地服务器。

以下是一个简化的代码示例：

import React, { useState, useEffect } from 'react';
import { Button, Image, StyleSheet, Text, View } from 'react-native';
import axios from 'axios';
import { VisionCamera, useCameraDevices } from 'react-native-vision-camera';
 
export default function App() {
  const [camera, setCamera] = useState(null);
  const [previewUrl, setPreviewUrl] = useState(null);
 
  useEffect(() => {
    (async () => {
      const { camera } = await VisionCamera.getCameraInfo()[0];
      setCamera(camera);
    })();
  }, []);
 
  const takePhoto = async () => {
    if (camera) {
      const photo = await camera.takePicture();
      setPreviewUrl(photo.uri);
      uploadPhoto(photo.uri);
    }
  };
 
  const uploadPhoto = async (photoUri) => {
    const data = new FormData();
    data.append('photo', { uri: photoUri, name: 'photo.jpg', type: 'image/jpeg' });
    try {
      const response = await axios.post('http://your-local-server/upload', data, {
        headers: {
          'Content-Type': 'multipart/form-data',
        },
      });
      console.log('Photo uploaded:', response.data);
    } catch (error) {
      console.error('Error uploading photo:', error);
    }
  };
 
  return (
    <View style={styles.container}>
      {camera && (
        <VisionCamera style={styles.camera} cameraTexture={{}} camera={camera}>
          <View style={styles.preview}>
            {previewUrl && <Image source={{ uri: previewUrl }} style={styles.image} />}
          </View>
        </VisionCamera>
      )}
      <Button title="Take Photo" onPress={takePhoto} />
    </View>
  );
}
 
const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  camera: {
    width: '100%',
    aspectRatio: 1.0,
  },
  preview: {
    overflow: 'hidden',
    aspectRatio: 1.0,
  },
  image: {
    width: '100%',
    height: '100%',
    resizeMode: 'contain',
  },
});

确保替换http://your-local-server/upload为你的本地服务器的实际上传URL。

注意：本示例假设你的本地服务器配置正确，可以接收上传的图片。在实际应用中，你可能需要处理权限问题、错误处理、优化用户体验等。