最近碰到一个项目要求需要上传给后端图片进行验证 话不多说 直接上代码 也等于给自己一个备份在碰见类似的可以再过来看一看

<template>
    <!-- <avue-form :option="option" v-model="form">
    </avue-form> -->
    <div class="uploadimg">
        <el-upload ref="upload" 
        :action="url"
         list-type="picture-card"
          accept="image/*" 
          :file-list="fileList"
            :limit="limit" 
            :auto-upload="false"
             :before-remove="beforremove" 
             :on-preview="handlePictureCardPreview"
            :on-exceed="handleExceed"
             :on-change="handlechange">
            <i class="el-icon-plus"></i>
        </el-upload>
        <el-dialog :visible.sync="dialogVisible" append-to-body>
            <img width="100%" :src="dialogImageUrl" alt="">
        </el-dialog>
        <el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传人脸照片</el-button>
    </div>
</template>

<script>
import { collection } from "@/api/system/user"; 封装好的上传地址 后端接口
export default {
    data() {
        return {
            // url:   //上传的地址
            fileList: [],
            formData: {},
            dialogImageUrl: '',
            limit: 3,
            dialogVisible: false,

        }
    },
    mounted() {
        this.fileList = []
    },
    methods: {
        async submitUpload() {
            let formData = new FormData();
            this.formData.forEach(file => {
                formData.append('pic', file.raw);
            })
            var that = this;
            //调用上传接口
            collection(formData).then(res => {
                console.log("上传结果", res);
                this.$message({
                    type: "msg",
                    message: res.data.msg,
                });
            })
        },
        handleExceed(files, fileList) {
            this.$message.warning(`当前限制选择 ${this.limit} 个文件`);
        },
        // beforremove(file, fileList) {
        //     this.$message.warning(`禁止删除`);
        //     return false;
        // },
        handleRemove(file, fileList) {
            this.checkLimit(fileList);
            console.log("删除文件：", file);
            this.fileList = fileList;
        },
        handlechange(file, fileList) {
            this.formData = fileList;
            this.checkLimit(fileList)
        },
        /**
          * @description: 检查文件长度, 若与限制长度相同则隐藏上传按钮
          * @param {*} filelist 上传文件列表
          * @return {*}
          */
        checkLimit(filelist) {
            const limit = this.limit
            const uploadDom = this.$refs['upload'];
            if (filelist.length === limit) {
                uploadDom.$children[1].$el.style.display = 'none'
            } else {
                uploadDom.$children[1].$el.style.display = ''
            }
        },
        handlePictureCardPreview(file) {
            console.log("文件预览：", file);
            this.dialogImageUrl = file.url;
            this.dialogVisible = true;
        }
    },

}
</script>