vue封装组件之上传图片组件

<template>  <div>    <el-form>      <!-- :on-change="uploadFile" -->      <el-upload        :limit="limit"   //最大允许上传个数        action        accept="image/*" //接受上传的        :on-change="uploadFile" //文件状态改变时的函数        list-type="picture-card" //文件列表的类型        :auto-upload="false" //是否在选取文件后立即进行上传        :file-list="fileList" //虚拟文件数组        :on-exceed="handleExceed" //文件超出个数限制时的函数        :on-preview="handlePictureCardPreview" //点击文件列表中已上传的文件时的函数        :on-remove="handleRemove" //文件列表移除文件时的函数        ref="upload"        class="avatar-uploader"        :class="{hide:showUpload}" //用来隐藏到达limit最大值之后 关闭上传按钮        :disabled="disabled" //为查看不能上传进行处理      >        <i class="el-icon-plus"></i>      </el-upload>      //查看图片      <el-dialog width="30%" :visible.sync="dialogVisible">        <img width="100%" :src="imgUrl.url" alt />      </el-dialog>      //如果不是需要直接上传的,而是需要按钮点击再进行图片上传请打开此方法      //上面的el-upload标签里on-change换成http-request方法      <!-- <Button text="上 传" type="add_u" style="margin-top: 10px;" @click.native="submitUpload"></Button> -->    </el-form>  </div></template><script>//引入上传图片接口import { uploadImg } from "@/api/public/api";export default {  props: {    limit: Number,    fileList: Array,    disabled: Boolean,  },  data() {    return {      showUpload: false, //控制limit最大值之后 关闭上传按钮      dialogVisible: false, //查看图片弹出框      imgUrl: [], //上传图片后地址合集    };  },  //监听上传图片的数组(为了处理修改时,自动渲染问题,和上传按钮消失问题);  watch: {    fileList(newName, oldName) {      if (newName.length == this.limit) this.showUpload = true;      else this.showUpload = false;    },  },  methods: {    //文件列表移除文件时的函数    handleRemove(file, fileList) {      const index = this.fileList.findIndex((item) => item === file.uid);      this.imgUrl.splice(index, 1);      this.$emit("delUrl", this.imgUrl);      if (fileList.length < this.limit) this.showUpload = false;    },    //点击文件列表中已上传的文件时的函数    handlePictureCardPreview(file) {      this.imgUrl.url = file.url;      this.dialogVisible = true;    },    //这里是不需要直接上传而是通过按钮上传的方法    submitUpload() {      this.$refs.upload.submit();    },    //文件状态改变时的函数(主要逻辑函数)    uploadFile(e, fileList) {      //判断用户上传最大数量限制,来让上传按钮消失      if (fileList.length >= this.limit) this.showUpload = true;      // const file = e.file; <- 这里是不需要直接上传而是通过按钮上传的      const file = e.raw; // <- 这里是直接上传的      //大小      const size = file.size / 1024 / 1024 / 2;      if (        !(          file.type === "image/png" ||          file.type === "image/gif" ||          file.type === "image/jpg" ||          file.type === "image/jpeg"        )      ) {        this.$notify.warning({          title: "警告",          message:            "请上传格式为image/png, image/gif, image/jpg, image/jpeg的图片",        });      } else if (size > 2) {        this.$notify.warning({          title: "警告",          message: "图片大小必须小于2M",        });      } else {        if (this.limit == 1) this.imgUrl = []; //此处判断为一张的时候需要清空数组        const params = new FormData();        params.append("source", file);        uploadImg(params).then((res) => {        //这里返回的数据结构(根据自己返回结构进行修改)          if (res.data.status === 1) {            this.$message.success("上传成功");            this.imgUrl = res.data;            //调用父组件的方法来传递图片参数            this.$emit("getUrl", this.imgUrl);          } else this.$message.error("上传失败");        });      }    },    //文件超出个数限制时的函数    handleExceed(files, fileList) {      this.$message.info(`最多只允许上传${this.limit}张图片`);    },  },};</script>//这里修改上传前后的样式(我觉得el-upload不好看 也可以自行修改)<style  scope>.hide .el-upload--picture-card {  display: none !important;}.avatar-uploader > .el-upload {  width: 200px;  height: 200px;  line-height: 200px;  border-radius: 0px;  background: #fff;  border: 1px dashed #ccc;}.avatar-uploader > .el-upload > i {  font-size: 28px;  color: #ccc;}.avatar-uploader > .el-upload-list {  display: block;}.avatar-uploader > .el-upload-list > .el-upload-list__item {  width: 200px;  height: 200px;  display: block;}.avatar-uploader > .el-upload-list > .el-upload-list__item > img {  width: 200px;  height: 200px;  border-radius: 0px;}</style>

//图片上传组件import UploadImg from "@/views/common/UploadImg.vue";Vue.component('UploadImg', UploadImg)

<el-form-item label="上传图片"> //limit 最大上传几张图片  //fileList 图片数组   //getUrl 获取上传后地址 //delUrl 删除上传后地址  // disabled 禁用处理  <UploadImg :limit="1" :file-list="fileList" @getUrl="getUrl($event,'自己需要携带的参数')" @delUrl="delUrl($event,'自己需要携带的参数')" :disabled="true" /></el-form-item>//变量声明data:{ fileList:[] }//函数getUrl(getUrl){ console.log(getUrl) };delUrl(getUrl){console.log(getUrl)};