微信小程序可滑动月日历组件使用详解_javascript技巧

<!--components/calendar/index.wxml-->
<view class='month'>
  <!-- <view class='arrow' bindtap='prevMonth'>《 </view> -->
  <view>
    <picker mode="date" value="{{date}}" start="2015-09" end="2020-09" fields='month' bindchange="bindDateChange">
    <view >
      {{date}}
    </view>
    </picker>
  </view>
  <!-- <view class='arrow' bindtap='nextMonth'> 》</view> -->
</view>
<view class='container'>
<view class='calendar flex column s-center'>
 <view class='week-row flex m-around wid100'>
  <view class='grid' wx:for="{{week}}" wx:key='item'>{{item}}</view>
 </view>
 <swiper class='swpier-box' circular="true" current="{{swiperIndex}}" bindchange='swiperChange'>
  <swiper-item class='flex m-around days-table '>
   <view wx:for="{{calendar.first}}" wx:for-item='x' wx:key='x.date'
    class='grid fw {{x.month === month?"":"notCurrent"}} {{x.date === today?"today":""}} {{x.date == beSelectDate ? "choice":""}}' data-month='{{x.month}}' data-day='{{x.day}}' data-date='{{x.date}}' bindtap='bindDayTap'>
     <view class='view {{x.year+"-"+x.month+"-"+x.day === date+"-01"?"choice2":""}}'>{{x.date === today?'今天':x.day}}</view>
      <block wx:if="{{workerClockData.length>0}}">
       <view wx:for="{{workerClockData}}" wx:key="{{index}}">
       <text class='da' wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">记</text>
       <text class='da2'wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">+{{item.actualDayWage}}</text>
       </view>
      </block>
   </view>
  </swiper-item>
  <swiper-item class='flex m-around days-table '>
   <view wx:for="{{calendar.second}}" wx:for-item='x' wx:key='x.date'
    class='grid fw {{x.month === month?"":"notCurrent"}} {{x.date === today?"today":""}} {{x.date == beSelectDate ? "choice":""}}' data-month='{{x.month}}' data-day='{{x.day}}' data-date='{{x.date}}' data-test='{{(year + "-" +month + "-" + day)}}' bindtap='bindDayTap'>
    <view class='view {{x.year+"-"+x.month+"-"+x.day === date+"-01"?"choice2":""}}'>{{x.date === today?'今天':x.day}}</view>
    <block wx:if="{{workerClockData.length>0}}">
     <view wx:for="{{workerClockData}}" wx:key="{{index}}">
      <text class='da' wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">记</text>
      <text class='da2'wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">+{{item.actualDayWage}}</text>
     </view>
    </block>
   </view>
  </swiper-item>
  <swiper-item class='flex m-around days-table'>
   <view wx:for="{{calendar.third}}" wx:for-item='x' wx:key='x.date'
    class='grid fw {{x.date === today?"today":""}} {{x.date == beSelectDate ? "choice":""}}' data-month='{{x.month}}' data-day='{{x.day}}' data-date='{{x.date}}' bindtap='bindDayTap'>
     <view class='view {{x.year+"-"+x.month+"-"+x.day === date+"-01"?"choice2":""}}{{x.month === month?"":"notCurrent"}}'>{{x.date === today?'今天':x.day}}</view>
     <block wx:if="{{workerClockData.length>0}}">
     <view wx:for="{{workerClockData}}" wx:key="{{index}}">
      <text class='da' wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">记</text>
      <text class='da2'wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">+{{item.actualDayWage}}</text>
     </view>
    </block>
   </view>
  </swiper-item>
  <swiper-item class='flex m-around days-table '>
   <view wx:for="{{calendar.fourth}}" wx:for-item='x' wx:key='x.date'
    class='grid fw {{x.month === month?"":"notCurrent"}} {{x.date === today?"today":""}} {{x.date == beSelectDate ? "choice":""}}' data-month='{{x.month}}' data-day='{{x.day}}' data-date='{{x.date}}' bindtap='bindDayTap'>
     <view class='view {{x.year+"-"+x.month+"-"+x.day === date+"-01"?"choice2":""}}'>{{x.date === today?'今天':x.day}}</view>
     <block wx:if="{{workerClockData.length>0}}">
      <view wx:for="{{workerClockData}}" wx:key="{{index}}">
      <text class='da' wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">记</text>
      <text class='da2'wx:if="{{x.year+'-'+x.month+'-'+x.day==item.clockDate}}">+{{item.actualDayWage}}</text>
     </view>
    </block>
   </view>
  </swiper-item>
 </swiper>
</view>
</view>

/* pages/calendar/calendar.wxss */
.container{
 width: 100%;
 height: auto;
 padding: 6rpx;
 font-size: 28rpx;
}
 .month{
 width: 100%;
 height: 100rpx;
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 32rpx;
  color:#333333;
  font-weight: 700;
 border-bottom: 1px solid #f5f5f5;
}
.days-table {
 flex-wrap: wrap;
 align-content: flex-start;
}
.wid100{
 width: 100%;
}
.calendar{
 z-index:10000;
 
}

.grid {
 /* width: 107.14rpx; */
 height: 100rpx;
 text-align: center;
 line-height: 100rpx;
 font-size:.7rem;
 color:#333333;
 flex: 1;
}
.today {
 color: red;
}
.grid view {
 height:85rpx;
 line-height: 85rpx;
 width:85rpx;
 flex: 1
}
.choice2 {
 /* border-radius: 50%; */
 background: silver;
 background-position:center;
 color: white;
}
.choice .view{
 flex: 1;
 border-radius: 50%;
 background: #88a1fd;
 background-position:center;
 color: white;
 display: flex;
 align-items: center;
 justify-content: center
}
.fw {
 font-weight: 700;
 font-size: 28rpx;
 position: relative;
}
.grid text.da{
 display: flex;
 width: 32rpx;
 height: 32rpx;
 position: absolute;
 right:12rpx;
 top:1rpx;
 font-weight: 1000;
 background: red;
 border-radius: 50%;
 overflow: hidden;
 text-align: center;
 line-height: 24rpx;
 color: #ffffff;
 font-size: 8px;
align-items: center;
justify-content: center
}
.grid text.da2 {
 width: 100%;
 height: 100%;
 text-align: center;
 font-size: 12px;
 font-weight: 800;
 color: red;
 position: absolute;
 bottom:-25rpx;
 display: flex;
 left: -4rpx;
 align-items: center;
 justify-content: center;
 
}
/* 非本月日期 */
.notCurrent {
 color: silver;
 font-weight: normal
}
.day-hover {
 background: red;
}
.container .corred {
 color: red;
}
.swpier-box {
 height: 600rpx;
 width: 100%;
}
.arrow {
 width: 100rpx;
 color: #88a1fd;
 text-align: center;
}

.flex {
 display: flex;
}
/* 轴向 */
.column {
 flex-direction: column;
}
/* 主轴方向 */
.m-start {
 justify-content: flex-start;
}

.m-end {
 justify-content: flex-end;
}

.m-around {
 justify-content: space-around;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr;
}

.m-between {
 justify-content: space-between;
}
.m-center {
 justify-content: center;
}
/* 侧轴方向 */
.s-start {
 align-items: flex-start;
}
.s-end {
 align-items: flex-end;
}

.s-around {
 align-items: space-around;
}
.s-between {
 align-items: space-between;
}
.s-center {
 align-items: center;
}

// components/calendar/index.js
let choose_year = null,
 choose_month = null;
Component({
 /**
  * 组件的属性列表
  */
 properties: {
  workerClockData: {
   type: Array,
   observer: function (newVal, oldVal, changedPath) {
    // console.log(newVal, oldVal, changedPath,this)
   }

  }
 },

 /**
  * 组件的初始数据
  */
 data: {
  day: '',
  year: '',
  month: '',
  date: '2017-01',
  today: '',
  week: ['日', '一', '二', '三', '四', '五', '六'],
  calendar: {
   first: [],
   second: [],
   third: [],
   fourth: []
  },
  swiperMap: ['first', 'second', 'third', 'fourth'],
  swiperIndex: 1,
  showCaldenlar: false
 },
 ready: function () {
  this.getinit()

 },

 /**
  * 组件的方法列表
  */
 methods: {
  getinit() { //初始化
   const date = new Date()
    , month = this.formatMonth(date.getMonth() + 1)
    , year = date.getFullYear()
    , day = this.formatDay(date.getDate())
    , today = `${year}-${month}-${day}`
   let calendar = this.generateThreeMonths(year, month)
   // console.log(calendar)
   this.setData({
    calendar,
    month,
    year,
    day,
    today,
    beSelectDate: today,
    date: `${year}-${month}`
   })
  },
  showCaldenlar() {
   this.setData({
    showCaldenlar: !this.data.showCaldenlar
   })
  },
  /**
   * 
   * 左右滑动
   * @param {any} e 
   */
  swiperChange(e) {
   const lastIndex = this.data.swiperIndex
    , currentIndex = e.detail.current

   let flag = false
    , { year, month, day, today, date, calendar, swiperMap } = this.data
    , change = swiperMap[(lastIndex + 2) % 4]
    , time = this.countMonth(year, month)
    , key = 'lastMonth'
   console.log(lastIndex, currentIndex)
   if (lastIndex > currentIndex) {
    lastIndex === 3 && currentIndex === 0
     ? flag = true
     : null

   } else {
    lastIndex === 0 && currentIndex === 3
     ? null
     : flag = true
   }
   if (flag) {
    key = 'nextMonth'
   }
   console.log(key)
   year = time[key].year
   month = time[key].month
   date = `${year}-${month}`
   day = ''

   if (today.indexOf(date) !== -1) {
    day = today.slice(-2)
   }

   time = this.countMonth(year, month)
   calendar[change] = null
   calendar[change] = this.generateAllDays(time[key].year, time[key].month)

   this.setData({
    swiperIndex: currentIndex,
    //文档上不推荐这么做，但是滑动并不会改变current的值，所以随之而来的计算会出错
    year,
    month,
    date,
    day,
    calendar
   })
   // console.log(calendar)
  },
  /**
   * 
   * 点击切换月份，生成本月视图以及临近两个月的视图
   * @param {any} year 
   * @param {any} month 
   * @returns {object} calendar
   */
  generateThreeMonths(year, month) {
   let { swiperIndex, swiperMap, calendar } = this.data
    , thisKey = swiperMap[swiperIndex]
    , lastKey = swiperMap[swiperIndex - 1 === -1 ? 3 : swiperIndex - 1]
    , nextKey = swiperMap[swiperIndex + 1 === 4 ? 0 : swiperIndex + 1]
    , time = this.countMonth(year, month)
   delete calendar[lastKey]
   calendar[lastKey] = this.generateAllDays(time.lastMonth.year, time.lastMonth.month)
   delete calendar[thisKey]
   calendar[thisKey] = this.generateAllDays(time.thisMonth.year, time.thisMonth.month)
   delete calendar[nextKey]
   calendar[nextKey] = this.generateAllDays(time.nextMonth.year, time.nextMonth.month)
   return calendar
  },
  bindDayTap(e) {
   let { month, year } = this.data
    , time = this.countMonth(year, month)
    , tapMon = e.currentTarget.dataset.month
    , day = e.currentTarget.dataset.day
   if (tapMon == time.lastMonth.month) {
    this.changeDate(time.lastMonth.year, time.lastMonth.month)
   } else if (tapMon == time.nextMonth.month) {
    this.changeDate(time.nextMonth.year, time.nextMonth.month)
   } else {
    this.setData({
     day
    })
   }
   let beSelectDate = e.currentTarget.dataset.date;
   this.setData({
    beSelectDate,
    showCaldenlar: false
   })
   // console.log(beSelectDate)
  },
  bindDateChange(e) {
   if (e.detail.value === this.data.date) {
    return
   }

   const month = e.detail.value.slice(-2)
    , year = e.detail.value.slice(0, 4)

   this.changeDate(year, month)
  },
  prevMonth(e) {
   let { year, month } = this.data
    , time = this.countMonth(year, month)
   this.changeDate(time.lastMonth.year, time.lastMonth.month)
  },
  nextMonth(e) {
   let { year, month } = this.data
    , time = this.countMonth(year, month)
   this.changeDate(time.nextMonth.year, time.nextMonth.month)
  },
  /**
   * 
   * 直接改变日期
   * @param {any} year 
   * @param {any} month 
   */
  changeDate(year, month) {
   let { day, today } = this.data
    , calendar = this.generateThreeMonths(year, month)
    , date = `${year}-${month}`
   date.indexOf(today) === -1
    ? day = '01'
    : day = today.slice(-2)

   this.setData({
    calendar,
    day,
    date,
    month,
    year,
   })
  },
  /**
   * 
   * 月份处理
   * @param {any} year 
   * @param {any} month 
   * @returns 
   */
  countMonth(year, month) {
   let lastMonth = {
    month: this.formatMonth(parseInt(month) - 1)
   }
    , thisMonth = {
     year,
     month,
     num: this.getNumOfDays(year, month)
    }
    , nextMonth = {
     month: this.formatMonth(parseInt(month) + 1)
    }

   lastMonth.year = parseInt(month) === 1 && parseInt(lastMonth.month) === 12
    ? `${parseInt(year) - 1}`
    : year + ''
   lastMonth.num = this.getNumOfDays(lastMonth.year, lastMonth.month)
   nextMonth.year = parseInt(month) === 12 && parseInt(nextMonth.month) === 1
    ? `${parseInt(year) + 1}`
    : year + ''
   nextMonth.num = this.getNumOfDays(nextMonth.year, nextMonth.month)
   return {
    lastMonth,
    thisMonth,
    nextMonth
   }
  },
  currentMonthDays(year, month) {
   const numOfDays = this.getNumOfDays(year, month)
   return this.generateDays(year, month, numOfDays)
  },
  /**
   * 生成上个月应显示的天
   * @param {any} year 
   * @param {any} month 
   * @returns 
   */
  lastMonthDays(year, month) {
   const lastMonth = this.formatMonth(parseInt(month) - 1)
    , lastMonthYear = parseInt(month) === 1 && parseInt(lastMonth) === 12
     ? `${parseInt(year) - 1}`
     : year
    , lastNum = this.getNumOfDays(lastMonthYear, lastMonth) //上月天数
   let startWeek = this.getWeekOfDate(year, month - 1, 1) //本月1号是周几
    , days = []
   if (startWeek == 7) {
    return days
   }

   const startDay = lastNum - startWeek

   return this.generateDays(lastMonthYear, lastMonth, lastNum, { startNum: startDay, notCurrent: true })
  },
  /**
   * 生成下个月应显示天
   * @param {any} year 
   * @param {any} month
   * @returns 
   */
  nextMonthDays(year, month) {
   const nextMonth = this.formatMonth(parseInt(month) + 1)
    , nextMonthYear = parseInt(month) === 12 && parseInt(nextMonth) === 1
     ? `${parseInt(year) + 1}`
     : year
    , nextNum = this.getNumOfDays(nextMonthYear, nextMonth) //下月天数
   let endWeek = this.getWeekOfDate(year, month)    //本月最后一天是周几
    , days = []
    , daysNum = 0
   if (endWeek == 6) {
    return days
   } else if (endWeek == 7) {
    daysNum = 6
   } else {
    daysNum = 6 - endWeek
   }
   return this.generateDays(nextMonthYear, nextMonth, daysNum, { startNum: 1, notCurrent: true })
  },
  /**
   * 
   * 生成一个月的日历
   * @param {any} year 
   * @param {any} month 
   * @returns Array
   */
  generateAllDays(year, month) {
   let lastMonth = this.lastMonthDays(year, month)
    , thisMonth = this.currentMonthDays(year, month)
    , nextMonth = this.nextMonthDays(year, month)
    , days = [].concat(lastMonth, thisMonth, nextMonth)
   // console.log("jin")
   // console.log(year, month, days)
   return days
  },
  /**
   * 
   * 生成日详情
   * @param {any} year 
   * @param {any} month 
   * @param {any} daysNum 
   * @param {boolean} [option={
   *  startNum:1,
   *  grey: false
   * }] 
   * @returns Array 日期对象数组
   */
  generateDays(year, month, daysNum, option = {
   startNum: 1,
   notCurrent: false
  }) {
   const weekMap = ['一', '二', '三', '四', '五', '六', '日']
   let days = []
   for (let i = option.startNum; i <= daysNum; i++) {
    let week = weekMap[new Date(year, month - 1, i).getUTCDay()]
    let day = this.formatDay(i)
    days.push({
     date: `${year}-${month}-${day}`,
     event: false,
     day,
     week,
     month,
     year
    })
   }
   return days
  },
  /**
   * 
   * 获取指定月第n天是周几 |
   * 9月第1天： 2017, 08, 1 |
   * 9月第31天：2017, 09, 0 
   * @param {any} year 
   * @param {any} month 
   * @param {number} [day=0] 0为最后一天，1为第一天
   * @returns number 周 1-7, 
   */
  getWeekOfDate(year, month, day = 0) {
   let dateOfMonth = new Date(year, month, 0).getUTCDay() + 1;
   dateOfMonth == 7 ? dateOfMonth = 0 : '';
   return dateOfMonth;
  },
  /**
   * 
   * 获取本月天数
   * @param {number} year 
   * @param {number} month 
   * @param {number} [day=0] 0为本月0最后一天的
   * @returns number 1-31
   */
  getNumOfDays(year, month, day = 0) {
   return new Date(year, month, day).getDate()
  },
  /**
   * 
   * 月份处理
   * @param {number} month 
   * @returns format month MM 1-12
   */
  formatMonth(month) {
   let monthStr = ''
   if (month > 12 || month < 1) {
    monthStr = Math.abs(month - 12) + ''
   } else {
    monthStr = month + ''
   }
   monthStr = `${monthStr.length > 1 ? '' : '0'}${monthStr}`
   return monthStr
  },
  formatDay(day) {
   return `${(day + '').length > 1 ? '' : '0'}${day}`
  }

 }
})

//json文件调用
"usingComponents": {
   "calendarMonth": "../../components/calendarMonth/index"
}

//workerClockData 传过去的数据 显示签到金额 和 记
<calendarMonth workerClockData="{{workerClockData}}"></calendarMonth>