下载插件

使用npm:

npm i react-webcam

使用yarn:

yarn add react-webcam

使用npm:

npm i react-webcam

使用yarn：

yarn add react-webcam

前端

import React, { useEffect, useRef, useState } from 'react';
import Webcam from 'react-webcam';
import axios from 'axios';
import { history } from 'umi';
import './index.less';
import { Button } from 'antd-mobile';

export default function CameraComponent() {

  const webcamRef = useRef(null);
  const [obj, setObj] = useState(
    JSON.parse(window.sessionStorage.getItem('userinfo')),
  );

  const captureImage = () => {

    const imageSrc = webcamRef.current.getScreenshot();
    // 将图像数据发送到服务器
    uploadPic(imageSrc);
    history.push('/');
  };
  //将base64格式的图片转换成formdata格式，并上传到后台并获取本地图像
  const uploadPic = async (base64String) => {
    // 下面将要把 base64 转换成formdata
    // 这里对base64串进行操作，去掉url头，并转换为byte
    let bytes = window.atob(base64String.split(',')[1]);
    let array = [];
    for (let i = 0; i < bytes.length; i++) {
      array.push(bytes.charCodeAt(i));
    }
    let blob = new Blob([new Uint8Array(array)], { type: 'image/jpeg' });
    // 生成FormData对象
    let fd = new FormData();
    // 注：此处 file 应和后台接收参数匹配
    fd.append('file', blob, Date.now() + '.jpg');
    let config = {
      headers: { 'Content-Type': 'multipart/form-data' },
    };
    let { data } = await axios.post(
      'http://localhost:3000/img',
      fd,
      config,
    );
    console.log(data);
    obj[0].image = data.path;
    window.sessionStorage.setItem('userinfo', JSON.stringify(obj));  
  };

  return (
    <div className="camera">
      <Webcam
        audio={false}
        ref={webcamRef}
        style={{
          width: '100%',
        }}
      />
      <Button block color="primary" size="large" onClick={captureImage}>
        拍照并上传
      </Button>
    </div>
  );
}

后端

创建一个upload用来接收照片

router.post("/img", async (req, res) => {
  let form = new multiparty.Form()
  form.uploadDir = "upload"
  form.parse(req, (err, formData, imgData) => {
    console.log(imgData);
    res.send({ path: "http://localhost:3000/" + imgData.file[0].path })
  })
})