微信小程序封装日历组件

html
<view class="calendar-container">
  <view class="weekdays">
    <view class="weekday" wx:for="{{weekdays}}" wx:key="index">{{item}}</view>
  </view>
 
  <view class="calendar-grid">
    <CalendarCell
      class="calendar-cell"
      externalClass="{{cellClass}}"
      wx:for="{{calendarDates}}"
      wx:key="index"
      isOtherMonth="{{item.isOtherMonth}}"
      isToday="{{item.isToday}}"
      item="{{item}}"
      bind:tap="onCalendarCellClick"
      data-item="{{item}}"
    ></CalendarCell>
  </view>
</view>

js
import dayjs from '../../../utils/dayjs.min'
 
Component({
  properties: {
    // YYYY-MM
    date: {
      type: String,
      value: '2025-09',
      observer(newVal) {
        this.getCalendarDays(newVal)
      },
    },
 
    cellClass: {
      type: String,
      // value: "primary",
      value: 'plain',
    },
 
    calendarDates: {
      type: Array,
      value: [],
    },
  },
 
  data: {
    weekdays: ['一', '二', '三', '四', '五', '六', '日'],
  },
 
  lifetimes: {
    attached() {
      const { date } = this.data
 
      this.getCalendarDays(date)
    },
  },
 
  methods: {
    getCalendarDays(date) {
      const firstDay = dayjs(`${date}-01`)
      const lastDay = firstDay.endOf('month')
      const currentYear = firstDay.year()
      const currentMonth = firstDay.month() + 1
 
      // 获取第一天是星期几（调整为周一开始，0=周一，6=周日）
      const firstDayWeek = (firstDay.day() + 6) % 7
 
      // 获取当月天数
      const daysInMonth = lastDay.date()
 
      const calendarDays = []
 
      // 添加上个月的日期
      const prevMonth = firstDay.subtract(1, 'month')
      const prevMonthDays = prevMonth.endOf('month').date()
 
      for (let i = firstDayWeek - 1; i >= 0; i--) {
        const day = prevMonthDays - i
        calendarDays.push({
          day,
          isOtherMonth: true,
          isToday: false,
          dateStr: null,
        })
      }
 
      // 添加当月的日期
      for (let day = 1; day <= daysInMonth; day++) {
        const currentDate = dayjs(`${currentYear}-${currentMonth}-${day}`)
        const dateStr = currentDate.format('YYYY-MM-DD')
 
        // 使用 dayjs 判断是否是今天
        const isToday = currentDate.isSame(dayjs(), 'day')
 
        calendarDays.push({
          day,
          isOtherMonth: false,
          isToday,
          dateStr,
        })
      }
 
      // 添加下个月的日期
      const remainingCells = 7 - (calendarDays.length % 7)
      if (remainingCells < 7) {
        // 只有当不足一行时才添加
        for (let day = 1, i = 0; i < remainingCells; i++, day++) {
          calendarDays.push({
            day,
            isOtherMonth: true,
            isToday: false,
            dateStr: null,
          })
        }
      }
 
      this.triggerEvent('update:calendarDates', { value: calendarDays })
    },
 
    onCalendarCellClick(e) {
      const { item } = e.currentTarget.dataset
 
      this.triggerEvent('calendarCellClick', { value: item })
    },
  },
})

scss
.calendar-container {
  padding: 40rpx 0 24rpx;
  background: #fff;
  border-radius: 24rpx;
  overflow: hidden;
 
  .weekdays {
    display: flex;
 
    .weekday {
      flex: 1;
      width: 24rpx;
      height: 40rpx;
      flex-shrink: 0;
      color: #00000066;
      text-align: center;
      font-family: 'MiSans';
      font-size: 24rpx;
      font-style: normal;
      font-weight: 400;
      line-height: 40rpx;
    }
  }
 
  .calendar-grid {
    margin-top: 24rpx;
    display: flex;
    flex-wrap: wrap;
    background: #fff;
 
    .calendar-cell {
      width: calc(100% / 7);
    }
  }
}

html
<view
  class="date-cell {{isOtherMonth ? 'other-month' : ''}} {{isToday ? 'today' : ''}} {{externalClass}} {{item.isActive ? 'active' : ''}}"
  style="--type-color2: {{item.bgColor || '#f1f1f1'}};"
  bind:tap="onDateClick"
>
  <view class="primary-container">
    <text class="date-number">{{item.day}}</text>
    <!-- <text wx:if="{{externalClass === 'primary' && true}}" class="date-desc">上岗8</text> -->
    <text wx:if="{{externalClass === 'primary'}}" class="date-desc">{{item.label || ' '}}</text>
    <view class="status-dot" style="--type-color: {{item.dotColor}};"></view>
  </view>
</view>

js
Component({
  // externalClasses: ["calendar-cell-class"],
 
  properties: {
    isOtherMonth: {
      type: Boolean,
      value: false,
    },
    isToday: {
      type: Boolean,
      value: false,
    },
    item: {
      type: Object,
    },
 
    externalClass: {
      type: String,
    },
  },
 
  methods: {
    onDateClick(e) {
      const { item } = this.data
 
      this.triggerEvent('date-click', item)
    },
  },
})

scss
// 统计页面的日历样式
.date-cell.plain {
  padding: 24rpx 0;
  width: 100%;
  height: 60rpx;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
 
  &.other-month {
    .date-number {
      color: #ddd;
    }
  }
 
  &.today {
    .date-number {
      width: 40rpx;
      background-color: #01b5c3 !important;
      border-radius: 50%;
      color: #fff;
    }
  }
 
  &.today,
  &.active {
    .date-number {
      width: 40rpx;
      background-color: #01b5c3 !important;
      border-radius: 50%;
      color: #fff;
    }
  }
 
  .date-number {
    display: flex;
    width: 32rpx;
    height: 40rpx;
    flex-direction: column;
    justify-content: center;
    flex-shrink: 0;
    color: #000000;
    text-align: center;
    font-family: 'MiSans';
    font-size: 24rpx;
    font-style: normal;
    font-weight: 400;
    line-height: 40rpx;
  }
 
  .status-dot {
    margin-top: 12rpx;
    position: absolute;
    bottom: 16rpx;
    left: 50%;
    transform: translateX(-50%);
    width: 8rpx;
    height: 8rpx;
    border-radius: 50%;
    background-color: var(--type-color, red);
  }
}
 
// 排班日历页面的日历样式
.date-cell.primary {
  box-sizing: border-box;
  padding: 4rpx;
  position: relative;
  width: 100%;
  height: 124rpx;
  background-color: #f9f9f9;
 
  .primary-container {
    height: 100%;
    display: flex;
    justify-content: flex-start;
    flex-direction: column;
    align-items: center;
    background-color: var(--type-color2, #f1f1f1);
  }
 
  &.today {
    .primary-container {
      background-color: #01b5c3 !important;
    }
 
    .date-number {
      color: #ffffffe6;
 
      &::before {
        content: '0';
        color: transparent;
      }
    }
 
    .date-desc {
      color: #ffffff;
    }
  }
 
  &.other-month {
    .primary-container {
      background-color: #fafafa !important;
    }
 
    .date-number {
      color: #0000004d;
    }
 
    .date-desc {
      color: transparent;
    }
  }
 
  .date-number {
    color: #000000e6;
    text-align: center;
    font-family: 'MiSans';
    font-size: 24rpx;
    font-style: normal;
    font-weight: 500;
    line-height: 40rpx;
  }
 
  .date-desc {
    color: #191919;
    text-align: center;
    font-family: 'MiSans';
    font-size: 24rpx;
    font-style: normal;
    font-weight: 400;
    line-height: 40rpx;
 
    &::before {
      content: '0';
      color: transparent;
    }
  }
 
  .status-dot {
    margin-top: 21rpx;
    width: 10rpx;
    height: 10rpx;
    border-radius: 50%;
    background-color: var(--type-color, #01b5c3);
  }
}