<view class="box">
       <text>日期:</text>
       <view class="date">{{obtaindate}}</view>
 </view>

wxml中定义了一个文本元素，通过{{obtaindate}}获取js页面传递的日期数据

data:{
    obtaindate:""
},
onload:function(){
    let date= new Date;
    let year = date.getfullYear();
    let mounth = date.getmounth();
    let day = date.getday();
    let obtaindate = "$year-$mounth-$day";
    this.setDate({
        obtaindate:obtaindate
});
},

js页面中定义了一个date，通过该对象获取年月日，并将其拼接起来，通过this.setDate方法将拼接好的日期写入页面中

运行结果如下