微信小程序实现日历效果

<view class='box1' style='width: {{ sysw * 7 }}px'>
 <view class='datebox'>{{ year }} - {{ month}}</view>
 <block wx:for='{{ weekarr }}'>
  <view style='width: {{ sysw }}px; height: {{ sysw }}px; line-height: {{ sysw }}px;'>{{ item }}</view>
 </block>
 <block wx:for='{{ arr }}'>
  <view style='{{ index == 0 ? "margin-left:" + sysw * marlet + "px;" : "" }}width: {{ sysw }}px; height: {{ sysw }}px; line-height: {{ sysw }}px;' class='{{ item == getdate ? "dateon" : ""}}'>{{ item }}</view>
 </block>
</view>

.box1 .datebox{
 width: 100%;
 height: 50px;
 line-height: 50px;
 text-align: center;
 margin-top: 20px;
 font-size: 40rpx;
}

.box1{
 display: flex;
 flex-wrap: wrap;
 margin: 0 auto;
}

.box1>view{
 height: 30px;
 line-height: 30px;
 text-align: center;
 font-size: 34rpx;
}

.dateon{
 border-radius: 50%;
 background-color: hotpink;
 color: #fff;
}

// page/index/index.js
page({

 /**
  * 页面的初始数据
  */
 data: {
  arr: [],
  sysw: null,
  lastday: null,
  firstday: null,
  weekarr: ['日', '一', '二', '三', '四', '五','六'],
  year: null
 },

 //获取日历相关参数
 datatime: function () {
  var date = new date();
  var year = date.getfullyear();
  var month = date.getmonth() ;
  var months = date.getmonth() + 1;

  //获取现今年份
  this.data.year = year;

  //获取现今月份
  this.data.month = months;

  //获取今日日期
  this.data.getdate = date.getdate();

  //最后一天是几号
  var d = new date(year, months, 0);
  this.data.lastday = d.getdate();

  //第一天星期几
  let firstday = new date(year, month, 1);
  this.data.firstday = firstday.getday();
 },

 onload: function (options) {
  this.datatime();

  //根据得到今月的最后一天日期遍历 得到所有日期
  for (var i = 1; i < this.data.lastday + 1; i++) {
   this.data.arr.push(i);
  }
  var res = wx.getsysteminfosync();
  this.setdata({
   sysw: res.windowheight / 12,//更具屏幕宽度变化自动设置宽度
   marlet: this.data.firstday,
   arr: this.data.arr,
   year: this.data.year,
   getdate: this.data.getdate,
   month: this.data.month
  });
 }
})