Elment UI上传图片

官网地址:http://element.eleme.io/#/zh-CN/component/upload

1.引用element 上传控件。

 <el-upload
        action="/mgr/common/imgUpload"//这里需要配置一下文件上传地址（跨域）
        list-type="picture-card"
        accept="image/*"
        :limit="imgLimit"
        :file-list="productImgs"
        :multiple="isMultiple"
        :on-preview="handlePictureCardPreview"
        :on-remove="handleRemove"
        :on-success="handleAvatarSuccess"
        :before-upload="beforeAvatarUpload"
        :on-exceed="handleExceed"
        :on-error="imgUploadError">
        <i class="el-icon-plus"></i>
      </el-upload>
      <el-dialog :visible.sync="dialogVisible">
        <img width="100%" :src="dialogImageUrl" alt="">
      </el-dialog>

2.js

export default {
    data() {
      return {
        dialogImageUrl: '',
        dialogVisible: false,
        productImgs: [],
        isMultiple: true,
        imgLimit: 6
      }
    },
    methods: {
      handleRemove(file, fileList) {//移除图片
        console.log(file, fileList);
      },
      handlePictureCardPreview(file) {//预览图片时调用
        console.log(file);
        this.dialogImageUrl = file.url;
        this.dialogVisible = true;
      },
 
      beforeAvatarUpload(file) {//文件上传之前调用做一些拦截限制
        console.log(file);
        const isJPG = true;
        // const isJPG = file.type === 'image/jpeg';
        const isLt2M = file.size / 1024 / 1024 < 2;
 
        // if (!isJPG) {
        //   this.$message.error('上传头像图片只能是 JPG 格式!');
        // }
        if (!isLt2M) {
          this.$message.error('上传图片大小不能超过 2MB!');
        }
        return isJPG && isLt2M;
      },
      handleAvatarSuccess(res, file) {//图片上传成功
        console.log(res);
        console.log(file);
        this.imageUrl = URL.createObjectURL(file.raw);
      },
      handleExceed(files, fileList) {//图片上传超过数量限制
        this.$message.error('上传图片不能超过6张!');
        console.log(file, fileList);
      },
      imgUploadError(err, file, fileList){//图片上传失败调用
        console.log(err)
        this.$message.error('上传图片失败!');
      }
    }
  }

传单张：

<el-upload
  class="avatar-uploader"
  action="/api/v1/uploadImg"//注意跨域 
  :show-file-list="false"
  :on-success="handleAvatarSuccess"
  :before-upload="beforeAvatarUpload">
  <img v-if="imageUrl" :src="imageUrl" class="avatar">
  <i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>

<style>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
</style>

<script>
  export default {
    data() {
      return {
        imageUrl: ''
      };
    },
    methods: {
      handleAvatarSuccess(res, file) {
        this.imageUrl = URL.createObjectURL(file.raw);
      },
      beforeAvatarUpload(file) {
        const isJPG = file.type === 'image/jpeg';
        const isLt2M = file.size / 1024 / 1024 < 2;

        if (!isJPG) {
          this.$message.error('上传头像图片只能是 JPG 格式!');
        }
        if (!isLt2M) {
          this.$message.error('上传头像图片大小不能超过 2MB!');
        }
        return isJPG && isLt2M;
      }
    }
  }
</script>