前端对图片上传处理的两种方法

1. 前端传给后端进行上传

<el-image style="position:relative;height: 144px;width: 144px;border-radius: 50%"
          :src="basicForm.avatarUrl"></el-image>
<label class="btn" for="fileUpload"
       style="color: #f90;position: absolute;left: 25px;bottom: -50px;border: 1px solid #f90;font-size: 14px;height: 32px;width: 102px;text-align: center;line-height: 32px">更换头像<i
        style="margin-left:5px"></i></label>
<input @change="picSubmit" type="file" accept="image/*" id="fileUpload"
       style="position: absolute;clip: rect(0 0 0 0);"/>

picSubmit(event) {
                this.newFiles = event.target.files[0] || event.dataTransfer.files[0];
                this.isChangePic = true;
                let reader = new FileReader();
                var _this = this;
                reader.onload = (function () {
                    return function (e) {
                        _this.basicForm.avatarUrl = e.target.result;
                    };
                })(this.basicForm);
                reader.readAsDataURL(this.newFiles);
            },

提交：

import {Loading} from 'element-ui' // 等待样式

submitForm() {if (this.isChangePic) {
                    // 上传头像接口
                    // let data = new FormData();
                    // data.append('docStream', this.newFiles);  form的格式
                    let reader = new FileReader();  
                    var _this = this;
                    reader.onload = (function () {
                        return function (e) {
                            let options = {
                                text: '正在修改信息', spinner: 'el-icon-loading',
                                background: 'rgba(0, 0, 0, 0.7)', color: '#f90'
                            };
                            let loadingInstance = Loading.service(options);
                            reApi.postAvatar(_this.newFiles.type.split('/')[1], e.target.result).then(res => {
                                if (res.success) {
                                    _this.isChangePic = false;
                                    _this.basicForm.avatarUrl = res.data;
                        };
                    })(this.newFiles);
                    reader.readAsArrayBuffer(this.newFiles);
                }
            },

2. 前端上传OSS

picSubmit(event) {
//                console.log(event);
                let files = event.target.files || event.dataTransfer.files;
                if (!files.length) return;
                this.picValue = files[0];
                onSetUpOSS(this.picValue, url => {
                    this.productForm.picture = url;
                });
            },

import OSS from 'ali-oss';
//  图片上传阿里云OSS

function onSetUpOSS(image, callback = function () {
}) {
    let client = new OSS({
        region: 'oss-cn-shenzhen',
        accessKeyId: '',
        accessKeySecret: '',
        bucket: 'rootingfire-product'  // 文件夹
    });   
    client.put('目录' + new Date().getTime(), image).then((r1) => {
        callback(r1.url)
    });
}
export default onSetUpOSS;