image标签的SRC加上前缀

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<template>     <view class="content">                        <view class="itemtop" v-for="(item,index) in toplist">                 <view class="oneitem_img">                     <image :src="aaa(item.avator)"></image>                 </view>                 <view>{{index+1}}.{{item.name}}</view>                 <view>{{item.score}}分</view>             </view>  </view>        </template>   <script>     export default {         data() {             return {                 searchKey: '',                 title: 'Hello',                 toplist: [], //存前3名数据                 sublist: [], //存第4名往后的数据                 userlist: [] //存所有用户数据             };         },         onLoad() {                           ///一堆代码           },         methods: {                aaa(avator) {                 if (avator == '') {                     return "http://www.niunan.net/images/defaultface.jpg";                 } else {                     return "http://124.222.23.214:8889" + avator;                 }             },                     }     }; </script>