<el-button v-if="sys_push_type_add"
            class="filter-item"
            size="small"
            @click="handleCreate"
            type="primary"
            icon="edit">添加
       </el-button>
        <el-form-item label="头像" prop="icon">
          <el-upload
            class="avatar-uploader"
            action="/admin/upload"//后台提供的地址
            :show-file-list="false"
            :on-success="handleAvatarSuccess"
            :before-upload="beforeAvatarUpload">
            <img v-if="form.icon" :src="form.icon" class="avatar">
            <i v-else class="el-icon-plus avatar-uploader-icon"></i>
          </el-upload>
        </el-form-item>
    
    handleCreate() {
    //重点就是这里添加的时候可以直接清空整个表单，但是icon: ""一定要有，不然上传的图片就不会显示
      this.form = {icon: ""};
    },

    handleAvatarSuccess(jsonData, field) {
      this.form.icon = jsonData.filename;//图片上传成功后台返回的地址
    }, 

    beforeAvatarUpload(file) {}