微信小程序自定义带价格显示日历效果

var Moment = require("../../utils/moment.js");
var DATE_YEAR = new Date().getFullYear();
var DATE_MONTH = new Date().getMonth() + 1;
var DATE_DAY = new Date().getDate();
Page({
 data: {
 year: '',
 month: '',
 day: '',
 days: {},
 systemInfo: {},
 weekStr: ['日', '一', '二', '三', '四', '五', '六'],
 checkDate:[]
 },
 onLoad: function(options) {
 var _this = this;
 let now = new Date();
 let year = now.getFullYear();
 let month = now.getMonth() + 1;
 // 页面初始化 options为页面跳转所带来的参数
 this.createDateListData();
 this.setData({
  year: year,
  month: month
 })
 wx.getSystemInfo({
  success: function(res) {
  _this.setData({
   systemInfo: res,
  });
  }
 })
 },
 onReady: function() {
 // 页面渲染完成
 },
 onShow: function() {
 
 },
 
 /**创建日历数据 */
 createDateListData: function(setYear, setMonth) {
 //全部时间的月份都是按0~11基准，显示月份才+1
 let dateArr = []; //需要遍历的日历数组数据
 let arrLen = 0; //dateArr的数组长度
 let now = setYear ? new Date(setYear, setMonth) : new Date();
 let year = setYear || now.getFullYear();
 let nextYear = 0;
 let month = setMonth || now.getMonth();
 //没有+1方便后面计算当月总天数
 let nextMonth = (month + 1) > 11 ? 1 : (month + 1);
 console.log("当前选中月nextMonth：" + nextMonth);
 //目标月1号对应的星期
 let startWeek = this.getWeek(year, nextMonth, 1); //new Date(year + ',' + (month + 1) + ',' + 1).getDay(); 
 console.log("目标月1号对应的星期startWeek:" + startWeek);
 //获取目标月有多少天
 let dayNums = this.getTotalDayByMonth(year, nextMonth); //new Date(year, nextMonth, 0).getDate();   
 console.log("获取目标月有多少天dayNums:" + dayNums);
 let obj = {};
 let num = 0;
 if (month + 1 > 11) {
  nextYear = year + 1;
  dayNums = new Date(nextYear, nextMonth, 0).getDate();
 }
 for (var j = -startWeek + 1; j <= dayNums; j++) {
  var tempWeek = -1;
  if (j > 0) {
  tempWeek = this.getWeek(year, nextMonth, j);
  //console.log(year + "年" + month + "月" + j + "日" + "星期" + tempWeek);
  }
  var clazz = '';
  if (tempWeek == 0 || tempWeek == 6)
  clazz = 'week'
  if (j < DATE_DAY && year == DATE_YEAR && nextMonth == DATE_MONTH)
  //当天之前的日期不可用
  clazz = 'unavailable ' + clazz;
  else
  clazz = '' + clazz
  /**如果当前日期已经选中，则变色 */
  var date = year + "-" + nextMonth + "-" + j;
  var index = this.checkItemExist(this.data.checkDate, date);
  if (index != -1) {
  clazz = clazz + ' active';
  } 
  dateArr.push({
  day: j,
  class: clazz,
  amount:'￥99.8'
  })
 }
 this.setData({
  days: dateArr
 })
 },
 /**
 * 上个月
 */
 lastMonthEvent:function(){
 //全部时间的月份都是按0~11基准，显示月份才+1
 let year = this.data.month - 2 < 0 ? this.data.year - 1 : this.data.year;
 let month = this.data.month - 2 < 0 ? 11 : this.data.month - 2;
 this.setData({
  year: year,
  month: (month + 1)
 })
 this.createDateListData(year, month);
 },
 /**
 * 下个月
 */
 nextMonthEvent:function(){
 //全部时间的月份都是按0~11基准，显示月份才+1
 let year = this.data.month > 11 ? this.data.year + 1 : this.data.year;
 let month = this.data.month > 11 ? 0 : this.data.month;
 this.setData({
  year: year,
  month: (month + 1)
 })
 this.createDateListData(year, month);
 },
 /*
 * 获取月的总天数
 */
 getTotalDayByMonth: function(year, month) {
 month = parseInt(month, 10);
 var d = new Date(year, month, 0);
 return d.getDate();
 },
 /*
 * 获取月的第一天是星期几
 */
 getWeek: function(year, month, day) {
 var d = new Date(year, month - 1, day);
 return d.getDay();
 },
 /**
 * 点击日期事件
 */
 onPressDateEvent: function(e) {
 var {
  year,
  month,
  day,
  amount
 } = e.currentTarget.dataset;
 console.log("当前点击的日期：" + year + "-" + month + "-" + day);
 //当前选择的日期为同一个月并小于今天，或者点击了空白处（即day<0），不执行
 if ((day < DATE_DAY && month == DATE_MONTH) || day <= 0)
  return;
 
 this.renderPressStyle(year, month, day, amount);
 },
 renderPressStyle: function (year, month, day, amount) {
 var days = this.data.days;
 //渲染点击样式
 for (var j = 0; j < days.length; j++) {
  var tempDay = days[j].day;
  if (tempDay == day) {
  var date = year + "-" + month + "-" + day;
  var obj = {
   day: date,
   amount: amount
  };
  var checkDateJson = this.data.checkDate;
  var index = this.checkItemExist(checkDateJson, date);
  if (index == -1) {
   checkDateJson.push(obj);
   days[j].class = days[j].class + ' active';
  } else {
   checkDateJson.splice(index, 1);
   days[j].class = days[j].class.replace('active',' ');
  }
  this.setData({
   checkDate: checkDateJson
  })
  console.log(JSON.stringify(this.data.checkDate));
  break;
  }
 }
 this.setData({
  days: days
 });
 
 },
 /**检查数组中是否存在该元素 */
 checkItemExist: function (arr,value){
 for (var i = 0; i < arr.length; i++) {
  if (value === arr[i].day) {
  return i;
  }
 }
 return -1;
 }
})

<view class="date-year-month"><image bindtap='lastMonthEvent' src='../../image/left.png'></image>{{year}}年{{month}}月<image src='../../image/right.png' bindtap='nextMonthEvent' ></image></view>
 
<view ></view>
<view>
<view style="background:#F5F5F5;font-size: 30rpx; ">
 <view class="layout-flex row" style="background-color: #F5F5F5;">
 <text class="date-week" style="width:{{systemInfo.windowWidth/7-10}}px;height:20px" wx:for="{{weekStr}}" wx:key="{{index}}">
     <text wx:if="{{item !=='日' && item !=='六'}}">{{item}}</text>
 <text wx:if="{{item ==='日' || item ==='六'}}" class="week">{{item}}</text>
 </text>
 </view>
</view>
 <view class="layout-flex row" style="flex-wrap: wrap;margin-top:30rpx;">
 <view class="date-day {{item.day<=0?'bgwhite':item.class}}" style="width:{{systemInfo.windowWidth/7-10}}px;height:{{systemInfo.windowWidth/7}}px;" data-year="{{year}}" data-month="{{month}}" data-day="{{item.day}}" data-amount="{{item.amount}}"bindtap="onPressDateEvent"
  wx:for="{{days}}" wx:key="{{index}}">
  <view class='item-days'>
  <text>{{item.day>0?(item.daytext?item.daytext:item.day):''}}</text>
  <text class='amount' wx:if='{{item.day>0}}'>{{item.amount}}</text>
  
  </view>
 </view>
 </view>
</view>

/* pages/dateSelect/dateSelect.wxss */
 
.date-day {
 display: flex;
 padding: 5px;
 text-align: center;
 justify-content: center;
 align-items: center;
 flex-direction: column;
}
 
.date-day.bgitem {
 background-color: #d8ecf9;
}
 
.date-day.active {
 background: #099fde;
 color: #fff;
}
 
.date-day.unavailable {
 color: #aaa;
}
 
.date-week {
 display: flex;
 justify-content: center;
 align-content: center;
 margin: 5px;
}
 
.week {
 color: #099fde;
}
 
.row {
 display: flex;
 flex-direction: row;
}
 
.item-days {
 display: flex;
 flex-direction: column;
 justify-content: center;
 align-items: center;
 font-size: 35rpx;
}
.amount{
 font-size: 30rpx;
}
.bgwhite {
 background-color: #fff;
}
 
.date-year-month {
 text-align: center;
 font-size: 35rpx;
 height: 100rpx;
 line-height: 100rpx;
 display: flex;
 justify-content: center;
 align-items: center;
}
.date-year-month image{
 height: 50rpx;
 width: 50rpx;
 margin: 0 30rpx;
}

var Moment = function (date) {
 var date;
 if (date)
 this.date = new Date(date);
 else
 this.date = new Date();
 return this;
};
/**  
 * 对Date的扩展，将 Date 转化为指定格式的String  
 * 月(M)、日(d)、12小时(h)、24小时(H)、分(m)、秒(s)、周(E)、季度(q) 可以用 1-2 个占位符  
 * 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字)  
 * eg:  
 * "yyyy-MM-dd hh:mm:ss.S" ==> 2006-07-02 08:09:04.423 
 * "yyyy-M-d h:m:s.S" ==> 2006-7-2 8:9:4.18  
 * "yyyy-MM-dd E HH:mm:ss" ==> 2009-03-10 二 20:09:04  
 * "yyyy-MM-dd EE hh:mm:ss" ==> 2009-03-10 周二 08:09:04  
 * "yyyy-MM-dd EEE hh:mm:ss" ==> 2009-03-10 星期二 08:09:04 
 */
Moment.prototype.format = function (format) {
 var date = this.date;
 /*
  var r= /^(\d{4})-(\d{1,2})-(\d{1,2})$/; //正则表达式 匹配出生日期(简单匹配)  
  r.exec('1985-10-15');
  s1=RegExp.$1;s2=RegExp.$2;s3=RegExp.$3;//结果为1985 10 15
  */
 if (typeof date === 'string')
 date = this.parse(date);
 var o = {
 "M+": date.getMonth() + 1, //月份 
 "(d+|D+)": date.getDate(), //日 
 "(h+|H+)": date.getHours(), //小时 
 "m+": date.getMinutes(), //分 
 "s+": date.getSeconds(), //秒 
 "q+": Math.floor((date.getMonth() + 3) / 3), //季度 
 "S": date.getMilliseconds() //毫秒 
 };
 var week = {
 "0": "/u65e5",
 "1": "/u4e00",
 "2": "/u4e8c",
 "3": "/u4e09",
 "4": "/u56db",
 "5": "/u4e94",
 "6": "/u516d"
 };
 if (/(y+|Y+)/.test(format))
 format = format.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
 if (/(E+)/.test(format))
 format = format.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "/u661f/u671f" : "/u5468") : "") + week[date.getDay() + ""]);
 for (var k in o) {
 if (new RegExp("(" + k + ")").test(format))
  format = format.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
 }
 return format;
}
 
Moment.prototype.parse = function () {
 return this.date;
}
/**
 * 计算两个日期差差
 * return day
 */
Moment.prototype.differ = function (date) {
 var time1 = this.date.getTime();
 if (typeof date === 'string')
 date = new Date(date);
 var time1 = this.date.getTime();
 var time2 = date.getTime();
 var differ = Math.ceil((time1 - time2) / (1000 * 3600 * 24));//除不尽时,向上取整
 return differ;
}
 
Moment.prototype.add = function (num, optionType) {
 var date = this.date;
 if ('day' === optionType) {
 date.setDate(date.getDate() + num);
 }
 if ('month' === optionType) {
 date.setMonth(date.getMonth() + num);
 }
 if ('year' === optionType) {
 date.setFullYear(date.getFullYear() + num);
 }
 this.date = date;
 return this;
}
 
Moment.prototype.before = function (date) {
 return this.date.getTime() < new Date(date).getTime()
}
Moment.prototype.after = function (date) {
 return this.date.getTime() > date.getTime()
}
 
module.exports = function (date) {
 return new Moment(date);
}