小程序 -日曆展示當前日期

wxml

<view class='wrap'>
	<view>
		<view class='date-show'>
			<view class='lt-arrow' bindtap='lastMonth'>》
			</view>
			{{year}}年{{month}}月
			<view class='rt-arrow' bindtap='nextMonth'>
        <view>》</view>
			</view>
		</view>
	</view>
	<view class='header'>
		<view wx:for='{{date}}' wx:key=""  class='{{(index == todayIndex) && isTodayWeek ? "weekMark" : ""}}'>{{item}}<view></view></view>
	</view>
	<view class='date-box'>
		<view wx:for='{{dateArr}}' wx:key="" class='{{isToday == item.isToday ? "nowDay" : ""}}' data-date='{{item.isToday}}'>			
			<view class='date-head' bindtap='cilck'>
				<view>{{item.dateNum}}</view>
			</view>
		</view>
	</view>
</view>

 

wxss

.date-show{
	position: relative;
	width: 250rpx;
	font-family: PingFang-SC-Regular;
	font-size: 40rpx;
	color: #282828;
	text-align: center;
	margin: 59rpx auto 10rpx;
}
.lt-arrow,.rt-arrow{
	position: absolute;
	top: 1rpx;
	width: 60rpx;
	height: 60rpx;
}
.lt-arrow image,.rt-arrow image{
	width: 14rpx;
	height: 26rpx;
}
.lt-arrow{
	left: -110rpx;
	transform: rotate(180deg);
}
.rt-arrow{
	right: -100rpx;
}
.header{
	font-size: 0;
	padding: 0 24rpx;
}
.header>view{
	display: inline-block;
	width: 14.285%;
	color: #333;
	font-size: 30rpx;
	text-align: center;
	border-bottom: 1px solid #D0D0D0;
	padding: 39rpx 0;
}
.weekMark{
	position: relative;
}
.weekMark view{
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	border-bottom: 1px solid #22A7F6;
}
.date-box{
	font-size: 0;
	padding: 10rpx 0;
}
.date-box>view{
	position: relative;
	display: inline-block;
	width: 14.285%;
	color: #020202;
	font-size: 40rpx;
	text-align: center;
	vertical-align: middle;
	margin: 15rpx 0;
}
.date-head{
	height: 60rpx;
	line-height: 60rpx;
	font-size: 26rpx;
}
.nowDay .date-head{
	width: 60rpx;
	border-radius: 50%;
	text-align: center;
	color: #fff;
	background-color: #22A7F6;
	margin: 0 auto;
}
.date-weight{
	font-size: 22rpx;
	padding: 15rpx 0;
}
.nowDay .date-weight{
	color: #22A7F6;
}
.one{
	position: absolute;
	bottom: 0;
	right: 5rpx;
	width: 20rpx;
	height: 20rpx;
	border-radius: 50%;
	background-color: red;
}
.two{
	position: absolute;
	bottom: 30rpx;
	right: 5rpx;
	width: 20rpx;
	height: 20rpx;
	border-radius: 50%;
	background-color: blue;
}

 

JS

Page({
  data: {
    year: 0,
    month: 0,
    date: ['日', '一', '二', '三', '四', '五', '六'],
    dateArr: [],
    isToday: 0,
    isTodayWeek: false,
    todayIndex: 0
  },
  onLoad: function () {
    let now = new Date();
    let year = now.getFullYear();
    let month = now.getMonth() + 1;
    this.dateInit();
    this.setData({
      year: year,
      month: month,
      isToday: '' + year + month + now.getDate()
    })
  },
  dateInit: function (setYear, setMonth) {
    //全部時間的月份都是按0~11基準，顯示月份才+1
    let dateArr = [];						//需要遍歷的日曆數組數據
    let arrLen = 0;							//dateArr的數組長度
    let now = setYear ? new Date(setYear, setMonth) : new Date();
    let year = setYear || now.getFullYear();
    let nextYear = 0;
    let month = setMonth || now.getMonth();					//沒有+1方便後面計算當月總天數
    let nextMonth = (month + 1) > 11 ? 1 : (month + 1);
    let startWeek = new Date(year + ',' + (month + 1) + ',' + 1).getDay();							//目標月1號對應的星期
    
    let dayNums = new Date(year, nextMonth, 0).getDate();				//獲取目標月有多少天
    let obj = {};
    let num = 0;

    if (month + 1 > 11) {
      nextYear = year + 1;
      dayNums = new Date(nextYear, nextMonth, 0).getDate();
    }
    arrLen = startWeek + dayNums;
    for (let i = 0; i < arrLen; i++) {
      if (i >= startWeek) {
        num = i - startWeek + 1;
        obj = {
          isToday: '' + year + (month + 1) + num,
          dateNum: num,
          weight: 5
        }
      } else {
        obj = {};
      }
      dateArr[i] = obj;
    }
    this.setData({
      dateArr: dateArr
    })

    let nowDate = new Date();
    let nowYear = nowDate.getFullYear();
    let nowMonth = nowDate.getMonth() + 1;
    let nowWeek = nowDate.getDay();
    let getYear = setYear || nowYear;
    let getMonth = setMonth >= 0 ? (setMonth + 1) : nowMonth;

    if (nowYear == getYear && nowMonth == getMonth) {
      this.setData({
        isTodayWeek: true,
        todayIndex: nowWeek
      })
    } else {
      this.setData({
        isTodayWeek: false,
        todayIndex: -1
      })
    }
  },
  lastMonth: function () {
    //全部時間的月份都是按0~11基準，顯示月份才+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.dateInit(year, month);
  },
  nextMonth: function () {
    //全部時間的月份都是按0~11基準，顯示月份才+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.dateInit(year, month);
  },

  cilck:function(e){
    console.log(e);
  }
})