1.在data里面加入参数
statusBarHeight: uni.getSystemInfoSync ().statusBarHeight,//状态栏高度
2.对返回按钮处理
<!-- 空出状态栏高度-->
<view :style="'height:'+statusBarHeight+'px;'"></view>
<!-- 返回按钮 -->
<div class="font-30 font-bold color-white" style="height: 44px;line-height: 44px; display: flex;align-items: center;padding-left: 10px;" @click="closePage()">
<u-icon name="arrow-left" size="30" class="color-white"></u-icon>
<text class=" ml10">返回</text>
</div>