vue自定义日历组件的实现

实现一个日期组件，如图：

components.js代码如下：

Vue.component('sc-calendar',{
    template:'<div class="scCalendar">' +
    '<div class="calendar_header">' +
        '<div class="prev" @click="prevMonth"> < </div>' +
        '<span class="text_year">{{currentYear}}年</span>' +
        '<span class="text_month">{{currentMonth}}月</span>' +
        '<div class="next" @click="nextMonth"> > </div>' +
    '</div>' +
    '<div class="calendar_content">' +
        '<ul class="week">' +
            '<li v-for="item in weeks">{{item}}</li>' +
        '</ul>' +
        '<ul class="day">' +
            '<li v-for="item in dayList"  :class="{marginRight0:item.marginRight0}">{{item.text}}</li>' +
        '</ul>' +
    '</div>' +
    '</div>',
    data:function(){
        return {
            weeks: ['日', '一', '二', '三', '四', '五', '六'],
            dayList:[],
            currentYear:'',
            currentMonth: ''
        }
    },
    created:function(){
        var date=new Date;
        this.currentYear = date.getFullYear();
        this.currentMonth = date.getMonth()+1;
        this.calDay(this.currentYear, this.currentMonth);

    },
    methods:{
        //计算指定月份的天数
        calDay:function(year,month){
            var oDate = new Date();
            //setFullYear(year,month,day) 方法用于设置年份,返回调整过的日期的毫秒表示。
            oDate.setFullYear(year, month-1,1);
            oDate.setDate(1);//设置一个月中的第一天
            var oNow = oDate.getDay();//当前月的第一天是星期几
            var dayNum = 0; //指定月份的天数
            if(month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12){
                dayNum = 31;
            }else if(month==4 || month==6 || month==9 || month==11){
                dayNum = 30;
            }else if(month==2&&this.isLeaYear(year)){
                dayNum = 29;
            }else{
                dayNum = 28;
            }
            var SumDayLiNum = 0;//总共的格子数
            var lastNum = (dayNum-(7-oNow))%7; //最后剩余的数
            lastNum = lastNum == 0?0:7;
            SumDayLiNum = 7 + parseInt((dayNum-(7-oNow))/7)*7+lastNum;
            this.showDayList(dayNum,SumDayLiNum,oNow);
        },
        //判断是否是闰年
        isLeaYear:function(year){
            if(year%4==0&&year%100!=0){
                return true;
            }else{
                if(year%400==0){
                    return true;
                }else{
                    return false;
                }
            }
        },
        //显示当前日历内容
        showDayList:function(dayNum,SumDayLiNum,oNow){
            this.dayList = [];
            var rows = parseInt(SumDayLiNum/7);
            var cols = 7;
            for(var i=0;i<rows;i++){
                for(var j=0;j<cols ;j++){
                    if(j == cols-1){
                        this.dayList.push({
                            text:'',
                            marginRight0:true
                        })
                    }else{
                        this.dayList.push({
                            text:'',
                            marginRight0:false
                        })
                    }
                }
            }
            for(var z=1;z<=dayNum;z++){
                this.dayList[oNow].text = z;
                oNow++;
            }
        },
        prevMonth:function(){
            if( this.currentMonth == 1){
                this.currentYear = this.currentYear - 1;
                this.currentMonth = 12;
            }else{
                this.currentMonth = this.currentMonth - 1;
            }
            this.calDay(this.currentYear, this.currentMonth);
        },
        nextMonth:function(){
            if( this.currentMonth == 12){
                this.currentYear = this.currentYear + 1;
                this.currentMonth = 1;
            }else{
                this.currentMonth = this.currentMonth + 1;
            }
            this.calDay(this.currentYear, this.currentMonth);
        }

    }
});

ccal.css代码：

html {
  font-family: '微软雅黑';
}
body,
div,
span,
img,
ul,
li,
p {
  margin: 0;
  padding: 0;
}
ul,
li {
  list-style: none;
}
.commonprev {
  width: 0.46666667rem;
  height: 0.93333333rem;
  color: #ffffff;
  position: absolute;
  display: inline-block;
}
.commonyear {
  width: 5.46666667rem;
  height: 1.6rem;
  font-size: 1rem;
  color: #ffffff;
  position: absolute;
}
.scCalendar {
  width: 25rem;
  height: 21.66666667rem;
  background:  #005498;
  background-size: 100%;
}
.scCalendar .calendar_header {
  height: 2.93333333rem;
  width: 100%;
  position: relative;
  line-height: 2.93333333rem;
}
.scCalendar .calendar_header .prev {
  width: 0.46666667rem;
  height: 0.93333333rem;
  color: #ffffff;
  position: absolute;
  display: inline-block;
  left: 2.76666667rem;
}
.scCalendar .calendar_header .next {
  width: 0.46666667rem;
  height: 0.93333333rem;
  color: #ffffff;
  position: absolute;
  display: inline-block;
  right: 2.76666667rem;
}
.scCalendar .calendar_header .text_year {
  width: 5.46666667rem;
  height: 1.6rem;
  font-size: 1rem;
  color: #ffffff;
  position: absolute;
  left: 9.76666667rem;
}
.scCalendar .calendar_header .text_month {
  width: 5.46666667rem;
  height: 1.6rem;
  font-size: 1rem;
  color: #ffffff;
  position: absolute;
  left: 13.1rem;
}
.scCalendar .calendar_content {
  padding: 0 1rem;
}
.scCalendar .calendar_content li {
  width: 2rem;
  height: 2rem;
  line-height: 2rem;
  margin-right: 1.5rem;
  text-align: center;
  margin-bottom: 0.66666667rem;
  float: left;
  color: white;
  font-size: 0.93333333rem;
}
.scCalendar .calendar_content .week li:nth-of-type(7) {
  margin-right: 0;
}

.scCalendar .calendar_content .day .marginRight0 {
  margin-right: 0;
}

index.html代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="./ccal.css">
    <script>
        var pixRatio = 1/window.devicePixelRatio; //像素比
        var html = document.documentElement;
        document.write('<meta name="viewport" content="width=device-width,user-scalable=no,initial-scale='+ pixRatio +',minimum-scale='+ pixRatio +',maximum-scale='+ pixRatio +'">');
        html.style.fontSize = html.clientWidth/25 + 'px';
    </script>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
    <script src="./components.js"></script>
</head>
<body>
<div id="app">
    <div class="calendar">
        <sc-calendar></sc-calendar>
    </div>
</div>
</body>
<script>
    var vm = new Vue({
        el:'#app'
    })

</script>
</html>