index.wxml <van-row> <van-tabs class="tab-box" active="a"> <van-tab class="tab-card" title="湿度" name="b">内容 2</van-tab> </van-tabs> </van-row> 去除van-row标签或van-tab标签则不报错 否则就会出现 TypeError: Cannot read property '0' of undefined at e (wxml.js?t=wechat...