React后台管理手动封装图片上传组件

分为两个文件夹，index.js(逻辑文件)　　　　styled.js(样式文件)

index.js文件，编写完成之后在对应的地方引入即可

import React from "react"
import { UploadContainer } from "./styled"
import { Icon ,message} from "antd"
import { fetch as fetchPro } from "whatwg-fetch"
class Upload extends React.Component {
    constructor(props) {
        super(props)
        this.state = {
            imgUrl: ""
        }
        if (this.props.value) {
            this.state.imgUrl = this.props.value
        }
    }
    render() {
        let { imgUrl } = this.state
        return (
            <UploadContainer>
                <input type="file" onChange={this.handleUpdate.bind(this)} ref="files" />
                <div className="imgContent">
                    {imgUrl ? <img src={imgUrl} /> : <Icon type="plus" style={{ fontSize: 26 }} />}
                </div>
            </UploadContainer>
        )
    }
    async handleUpdate() {
        let fileImg = this.refs.files.files[0];


        let formData = new FormData()



        formData.append("filesImg", fileImg)//第一个参数为后端规定字段，第二个参数时需要上传的图片



        let data = await fetchPro("/ajax/upload/files", {
            method: "post",
            body: formData
        }).then(res => res.json())//第一个参数为地址,第二个参数为配置项
        
        if(data.data.urlPath){
            this.setState({
                imgUrl:data.data.urlPath
            })
        }else{
            message.error(data.data.info)
        }
    }
}




export default Upload

styled.js文件

import styled from "styled-components"

export const UploadContainer = styled.div`
    110px;
    height:110px;
    border:1px dashed #ccc;
    position:relative;
    input{
        opacity:0;
        110px;
        height:100%;
        position:absolute;
        left:0;
        top:0;
        z-index:2;
    }
    .imgContent{
        padding:5px;
        100%;
        height:100%;
        position:absolute;
        left:0;
        top:0;
        display:flex;
        justify-content:center;
        align-items:center;
        img{
            100%;
            height:100%;
        }
    }
`