前言：

       react有一个第三方插件 ReactFileReader   可以实现这个功能。

实现步骤：

1.安装插件  

npm install react-file-reader --save

 2.代码引入

import ReactFileReader from "react-file-reader";

3.写页面方法

<ReactFileReader

    fileTypes={[".png",".jpg",".gif", "jpeg"]}
    base64
    multipleFiles={!1}
    handleFiles={this.handleFiles}>
    <Button>
        <Icon type="upload" /> 选择文件
    </Button>

</ReactFileReader>


// 获取上传的图片的base64地址

handleFiles = (files) => {

    console.log(files.base64);

}

api:官网入口

Usage

Import React File Reader

import ReactFileReader from 'react-file-reader';

Basic Use

handleFiles = files => {

  console.log(files)

}



<ReactFileReader handleFiles={this.handleFiles}>

  <button className='btn'>Upload</button>

</ReactFileReader>

Response

HTML5 FileList

Base64

When base64 is true, React File Reader returns a JS Object including both the base64 files and the HTML5 FileList. You can access their values at Object.base64 or Object.fileList

handleFiles = (files) => {

  console.log(files.base64)

}



<ReactFileReader fileTypes={[".csv",".zip"]} base64={true} multipleFiles={true} handleFiles={this.handleFiles}>

  <button className='btn'>Upload</button>

</ReactFileReader>

Response

multipleFiles={true}

["data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA", "data:image/png;base64,i..."]

multipleFiles={false}

  "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA..."

Access HTML5 FileList with base64={true}

handleFiles = (files) => {
  console.log(files.fileList)
}