vue+elementUI实现图片上传功能

<el-form-item label="图片" prop="logo">
 <el-upload name="file" v-if="optype==0" 
  :action="'/upload'" 
  accept=".jpg, .png" 
  list-type="picture-card" 
  :file-list="fileLists" 
  :on-preview="handlePictureCardPreview" 
  :on-success="success" 
  :on-remove="handleRemove">
 <i class="el-icon-plus"></i>
 </el-upload>
 <!--大图弹出框-->
 <el-dialog :visible.sync="imgDialogVisible" size="full" :modal="false" title="查看大图片">
 <img width="100%" :src="dialogImageUrl" alt="">
 </el-dialog>
</el-form-item>

dialogImageUrl: '', 
imgDialogVisible: false, 
fileLists: [], 

vm.fileLists = [];
if (row.logo != undefined && row.logo != "") {
 vm.fileLists.push({url:row.logo});
}

//删除图片
handleRemove(file, fileList) {
 this.form.logo=''
},
//查看大图
handlePictureCardPreview(file) {
 this.dialogImageUrl = file.url;
 this.imgDialogVisible = true;
},
//图片上传成功
success(response, file, fileList) {
 this.fileLists = [];
 this.fileLists = [file]
 this.form.logo = file.response.result;
},