app 不支持dom，
2020-12-11 17:32
query.fields({ context: true }, data => { console.log("得到节点信息", data); }).exec() 传context 也拿不到值呢
2020-12-11 17:30
<picker id="picker" mode="date" :value="date" fields="month"></picker>
2020-12-11 14:37