VUE-周日历的实现

  <template>
   <div class="date">
     <!-- 年份 月份 -->
     <div class="month">
      <p><van-button class="vanbutton" icon="arrow-left" @click="pickPre(currentYear,currentMonth)" />{{ currentYear }}年{{ currentMonth }}月<van-button class="vanbutton" icon="arrow" @click="pickNext(currentYear,currentMonth)"/></p>

     </div>
     <!-- 星期 -->
     <ul class="weekdays">
     <li>一</li>
     <li>二</li>
     <li>三</li>
     <li>四</li>
     <li>五</li>
     <li>六</li>
     <li>日</li>
    </ul>
    <!-- 日期 -->
    <ul class="days">
     <li @click="pick(day)" v-for="(day, index) in days" :key="index">
      <!--本月-->
      <span v-if="day.getMonth()+1 != currentMonth" class="other-month">{{ day.getDate() }}</span>
      <span v-else>
      <!--今天-->
      <span v-if="day.getFullYear() == new Date().getFullYear() && day.getMonth() == new Date().getMonth() && day.getDate() == new Date().getDate()" class="active">{{ day.getDate() }}</span>
      <span v-else>{{ day.getDate() }}</span>
      </span>
     </li>
    </ul>
  </div>
 </template>

<script> 
 export default {
   name: ‘date‘,
  
   data () {
    return {
     currentYear: 1970,
     currentMonth: 1,
     currentDay: 1,
     currentWeek: 1,
     days: [],
    }
   },
  
   mounted () {
  
   },
  
   created () {
    this.initData(null)
   },
  
   methods: {
    formatDate (year, month, day) {
     const y = year
     let m = month
     if (m < 10) m = `0${m}`
     let d = day
     if (d < 10) d = `0${d}`
     return `${y}-${m}-${d}`
    },
  
    initData (cur) {
     let date = ‘‘
     if (cur) {
      date = new Date(cur)
     } else {
      date = new Date()
     }
     this.currentDay = date.getDate()     
     this.currentYear = date.getFullYear()   
     this.currentMonth = date.getMonth() + 1 
     this.currentWeek = date.getDay() 
     if (this.currentWeek === 0) {
     this.currentWeek = 7
     }
     const str = this.formatDate(this.currentYear, this.currentMonth, this.currentDay)
     this.days.length = 0
     for (let i = this.currentWeek - 1; i >= 0; i -= 1) {
      const d = new Date(str)
      d.setDate(d.getDate() - i)
      this.days.push(d)
    }
     for (let i = 1; i <= 7 - this.currentWeek; i += 1) {
     const d = new Date(str)
      d.setDate(d.getDate() + i)
      this.days.push(d)
     }

    },
  
    weekPre () {
     const d = this.days[0]  
     d.setDate(d.getDate() - 7)
     this.initData(d)
    },
  
    weekNext () {
     const d = this.days[6]  
     d.setDate(d.getDate() + 7)
     this.initData(d)
    },
  
    pickPre (year, month) {
     const d = new Date(this.formatDate(year, month, 1))
     d.setDate(0)
     this.initData(this.formatDate(d.getFullYear(), d.getMonth() + 1, 1))
    },
  
  
    pickNext (year, month) {
     const d = new Date(this.formatDate(year, month, 1))
     d.setDate(35)
     this.initData(this.formatDate(d.getFullYear(), d.getMonth() + 1, 1))
    },
  
     pick (date) {
     alert(this.formatDate(date.getFullYear(), date.getMonth() + 1, date.getDate()))

     }
   }
  }
 </script>

<style lang="scss">

  .date {
   height: 120px;
   color: #333;
   background-color: #fff;
   .vanbutton {
     border-color: #fff;
     top: 5px;
   }

  
   .month {
    font-size: 12px;
    text-align: center;
    margin-top: 10px;
   }
  
   .weekdays {
    display: flex;
    font-size: 14px;
    margin-top: 10px;
  
    li {
     flex: 1;
     text-align: center;
     color: #aaa;
    }
   }
  
   .days {
    display: flex;
  
    li {
     flex: 1;
     font-size: 15px;
     text-align: center;
     margin-top: 5px;
     line-height: 30px;
     width: 30px;
     height: 30px;
  
     .active {
      display: inline-block;
      width: 30px;
      height: 30px;
      color: #fff;
      border-radius: 50%;
      background-color: #fa6854;
     }
  
     .other-month {
      color: #e4393c;
     }
    }
   }
  }
 </style>