如何在react native中通过API body将图像或文件发送到服务器

npm install react-native-image-picker react-native-fetch-blob --save

import React, { Component } from 'react';
import { Button } from 'react-native';
import ImagePicker from 'react-native-image-picker';

class ImageUpload extends Component {
  handleImageUpload = () => {
    const options = {
      title: 'Select Image',
      storageOptions: {
        skipBackup: true,
        path: 'images',
      },
    };

    ImagePicker.showImagePicker(options, (response) => {
      if (response.didCancel) {
        console.log('User cancelled image picker');
      } else if (response.error) {
        console.log('ImagePicker Error: ', response.error);
      } else {
        // 发送图像或文件到服务器
        this.uploadToServer(response);
      }
    });
  };

  uploadToServer = (imageData) => {
    // 使用react-native-fetch-blob库发送请求
    // 这里只是一个示例，你需要根据你的服务器端实现进行相应的调整
    const url = 'http://your-server-url.com/upload';
    const data = new FormData();
    data.append('image', {
      uri: imageData.uri,
      type: imageData.type,
      name: imageData.fileName,
    });

    fetch(url, {
      method: 'POST',
      body: data,
    })
      .then((response) => response.json())
      .then((responseData) => {
        console.log('Upload success', responseData);
      })
      .catch((error) => {
        console.log('Upload error', error);
      });
  };

  render() {
    return (
      <Button title="Select Image" onPress={this.handleImageUpload} />
    );
  }
}

export default ImageUpload;