在helloUniApp上测试了顶部选项卡模板，多拉几次后refresh就不能隐藏了
修改了tabbar.nvue
<refresh class="refresh" @refresh="onrefresh(index1)" @pullingdown="onpullingdown" :display="tab.refreshing ? 'show' : 'hide'">
<div class="refresh-view">
<image class="refresh-icon" :src="refreshIcon" :style="{width: (tab.refreshing || pulling) ? 0: '30px'}" :class="{'refresh-icon-active': tab.refreshFlag}"></image>
<loading-indicator class="loading-icon" animating="true" v-if="tab.refreshing"></loading-indicator>
<text class="loading-text">{{tab.refreshText}}</text>
<text class="loading-text">{{tab.refreshing}}</text>
</div>
</refresh>tab.refreshing已经是false了，这是不是一个bug
