问题：使用vue加载图片变量，为了图片的自适应，需设置为背景图居中排布

<tr v-for="(item,index) in dataObj">
    <td class="video-msg" v-bind:id="item.videoid">
    	<div class="videoImg fl" v-bind:style="{backgroundImage:'url(' + item.videopic + ')'}">
    	</div>
    </td>
    <td v-if="item.videoisdel == 3">审核中</td>
    <td>{{item.publishdate}}</td>
    <td>sss
    	<button class="delete" @click='delConfirm(item.videoid)'>删除</button>
    </td>
</tr>

行内样式的写法：

• v-bind:style="{backgroundImage:'url(' + item.videopic + ')', backgroundRepeat:'no-repeat', backgroundPosition:'center center', backgroundSize: 'contain'}"

• :style="{height: showList && carList.length > 0 ? '23rem' : '0'}"