elementui半年选择组件

1.基于elementui开发的半年选择组件

2.调用

<el-halfyear-picker v-model="date" :size="size"></el-halfyear-picker>

3.代码

<template>
    <div class="el-quarter-picker-wrap">
        <el-popover placement="bottom-start" title="" trigger="manual" content="" width="235"
            v-model="showCard">
            <el-input slot="reference" v-model="showText" placeholder="请选择" :size="size" clearable prefix-icon="el-icon-date" readonly
            @click.stop.native="showCard = true"
            ></el-input>
            <div>
                <!-- 年份切换 -->
                <div style="display: flex;align-items: center;justify-content: space-between;">
                    <div>
                        <el-button icon="el-icon-arrow-left"  type="text" style="color:#303133;" @click="onChange('prev')"></el-button>
                    </div>
                    <div style="font-size: 16px;">{{showYear}}</div>
                    <div>
                        <el-button icon="el-icon-arrow-right"  type="text" style="color:#303133;" @click="onChange('next')"></el-button>
                    </div>
                </div>

                <!-- 季度列表 -->
                <div style="display: flex;align-items: center;justify-content: space-between;flex-wrap: wrap;">
                    <div style="width:50%;text-align: center;margin-bottom: 5px;">
                        <el-link :type="isActive(showYear,1)? 'primary':''" :underline="false" @click="selectEvent(1)">上半年</el-link>
                    </div>
                    <div style="width:50%;text-align: center;margin-bottom: 5px;">
                        <el-link :type="isActive(showYear,2)? 'primary':''" :underline="false" @click="selectEvent(2)">下半年</el-link>
                    </div>
                </div>
            </div>
        </el-popover>
    </div>
</template>

<script>
    //季度选择器：
    module.exports = {
        data() {
            return {
                showCard: false,

                showTime: new Date(), //展示的时间 完整
                showYear: "", //当前时间 年

                selectTime: "",//选中的当前时间
            }
        },
        props: {
            size: {
                type: String,
                default: "small"
            },
            value:{
                type: [String,Number],
                default: "" ,//2022-08-23
            }
        },
        model:{
            prop:"value",//定义v-model的值传递给那个prop属性
            event:"change",//定义此事件触发时，自动更新父组件v-model对应的数据  
        },
        watch:{
            value:{
                immediate:true,
                handler:function(val){
                    if(!val){
                        this.selectTime =  "" //当前时间
                    }else{
                        //解析传入的时间
                        this.selectTime = new Date(val)
                        //定位到当前年份
                        this.showTime = new Date(val)
                        this.showYear = this.showTime.getFullYear()
                    }
                }
            }
        },
        created(){
            this.showYear = this.showTime.getFullYear()
        },
        mounted(){
            //监听全局按钮的点击
            var that = this
            document.body.addEventListener('click',function(){
                //console.log('点击了body')
                that.showCard = false
            })
        },
        methods:{
            //点击前后切换年份
            onChange(type = ''){
                if(type == 'next'){
                    //时间往前后一年
                    this.showTime.setFullYear(this.showTime.getFullYear()+1)
                }else if(type == 'prev'){
                    //时间往前推一年
                    this.showTime.setFullYear(this.showTime.getFullYear()-1)
                }

                //更新展示的时间
                this.showYear = this.showTime.getFullYear()
            },
            //选中事件
            selectEvent(halfyear_num = 1){
                //创建一个时间
                var time = new Date()
                //设定年份
                time.setFullYear(this.showYear)
                //设定月份 
                if(halfyear_num == 1){
                    //上半年设为1月
                    time.setMonth(0)
                }else{
                    //下半年设为7月
                    time.setMonth(6)
                }
                //设定日期和时分秒
                time.setDate(1)
                time.setHours(0)
                time.setMinutes(0)
                time.setSeconds(0)

                //隐藏
                this.showCard = false

                //更新当前时间
                this.selectTime = time

                var date_text = this.transformDateMethod(this.selectTime,format='YY-MM-DD')

                //通知父组件 返回时间戳
                this.$emit('change',date_text)
            },
            //判断选中的时间和展示的时间是否匹配
            isActive(showYear,halfyear_num){
                // 如果没有选中时间  直接return false
                if(!this.selectTime){
                    return false
                }

                //当前年份
                var select_year = this.selectTime.getFullYear()

                //判断当前季度
                var select_halfyear_num = ""
                var select_month = this.selectTime.getMonth() + 1
                if(select_month >= 1 && select_month <= 6){
                    select_halfyear_num = 1
                }else{
                    select_halfyear_num = 2
                }

                //如果年份 季度一致 则直接返回true
                if(select_year == showYear && select_halfyear_num == halfyear_num){
                    return true
                }else{
                    return false
                }
            },
            transformDateMethod(dateobj,format=''){
                var year = dateobj.getFullYear()
                var month = dateobj.getMonth()+1
                var date = dateobj.getDate()
                var hours = dateobj.getHours()
                var minutes = dateobj.getMinutes()
                var seconds = dateobj.getSeconds()
                var day = dateobj.getDay()
                var day_str = ''
                switch(day){
                    case 0: day_str = '星期日';break;
                    case 1: day_str = '星期一';break;
                    case 2: day_str = '星期二';break;
                    case 3: day_str = '星期三';break;
                    case 4: day_str = '星期四';break;
                    case 5: day_str = '星期五';break;
                    case 6: day_str = '星期六';break;
                    default: break;
                }
                if(month < 10){
                    month = '0'+ month
                }
                if(date < 10){
                    date = '0'+ date
                }
                if(hours < 10){
                    hours = '0'+ hours
                }
                if(minutes < 10){
                    minutes = '0'+ minutes
                }
                if(seconds < 10){
                    seconds = '0'+ seconds
                }
                if(format == ''){
                    return `${year}年${month}月${date}日 ${hours}:${minutes}:${seconds} ${day_str}`
                }else{
                    //替换年月日时分秒
                    format = format.replace('YY',year)
                    format = format.replace('MM',month)
                    format = format.replace('DD',date)
                    format = format.replace('hh',hours)
                    format = format.replace('mm',minutes)
                    format = format.replace('ss',seconds)
                    format = format.replace('Day',day_str)
                    return format
                }
            }
        },
        computed:{
            //展示选中的时间
            showText(){
                if(!this.selectTime){
                    return ""
                }

                var halfyear_text = ""
                var month = this.selectTime.getMonth()+1
                if(month >= 1 && month <= 6){
                    halfyear_text = "上半年"
                }else{
                    halfyear_text = "下半年"
                }

                return `${this.selectTime.getFullYear()}年 ${halfyear_text}`
            }
        }
    }
</script>

<style scoped>

</style>