<template> 
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    <u-popup 
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        :show="show" 
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        mode="bottom" 
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        closeable 
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        @close="close" 
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        :round="round" 
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        :closeOnClickOverlay="closeOnClickOverlay" 
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    > 
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        <view class="u-calendar"> 
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            <uHeader 
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                :title="title" 
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                :subtitle="subtitle" 
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                :showSubtitle="showSubtitle" 
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                :showTitle="showTitle" 
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            ></uHeader> 
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            <scroll-view 
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                :style="{ 
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                    height: $u.addUnit(listHeight) 
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                }" 
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                scroll-y 
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                @scroll="onScroll" 
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                :scroll-top="scrollTop" 
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                :scrollIntoView="scrollIntoView" 
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            > 
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                <uMonth 
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                    :color="color" 
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                    :rowHeight="rowHeight" 
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                    :showMark="showMark" 
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                    :months="months" 
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                    :mode="mode" 
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                    :maxCount="maxCount" 
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                    :startText="startText" 
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                    :endText="endText" 
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                    :defaultDate="defaultDate" 
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                    :minDate="innerMinDate" 
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                    :maxDate="innerMaxDate" 
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                    :maxMonth="monthNum" 
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                    :readonly="readonly" 
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                    :maxRange="maxRange" 
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                    :rangePrompt="rangePrompt" 
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                    :showRangePrompt="showRangePrompt" 
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                    :allowSameDay="allowSameDay" 
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                    ref="month" 
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                    @monthSelected="monthSelected" 
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                    @updateMonthTop="updateMonthTop" 
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                ></uMonth> 
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            </scroll-view> 
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            <slot name="footer" v-if="showConfirm"> 
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                <view class="u-calendar__confirm"> 
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                    <u-button 
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                        shape="circle" 
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                        :text=" 
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                            buttonDisabled ? confirmDisabledText : confirmText 
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                        " 
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                        :color="color" 
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                        @click="confirm" 
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                        :disabled="buttonDisabled" 
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                    ></u-button> 
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                </view> 
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            </slot> 
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        </view> 
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    </u-popup> 
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</template> 
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<script> 
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import uHeader from './header.vue' 
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import uMonth from './month.vue' 
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import props from './props.js' 
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import util from './util.js' 
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import dayjs from '../../libs/util/dayjs.js' 
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import Calendar from '../../libs/util/calendar.js' 
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/** 
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 * Calendar 日历 
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 * @description  此组件用于单个选择日期,范围选择日期等,日历被包裹在底部弹起的容器中. 
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 * @tutorial https://www.uviewui.com/components/calendar.html 
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 * 
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 * @property {String}                title                标题内容 (默认 日期选择 ) 
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 * @property {Boolean}                showTitle            是否显示标题  (默认 true ) 
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 * @property {Boolean}                showSubtitle        是否显示副标题    (默认 true ) 
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 * @property {String}                mode                日期类型选择  single-选择单个日期,multiple-可以选择多个日期,range-选择日期范围 ( 默认 'single' ) 
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 * @property {String}                startText            mode=range时,第一个日期底部的提示文字  (默认 '开始' ) 
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 * @property {String}                endText                mode=range时,最后一个日期底部的提示文字 (默认 '结束' ) 
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 * @property {Array}                customList            自定义列表 
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 * @property {String}                color                主题色,对底部按钮和选中日期有效  (默认 ‘#3c9cff' ) 
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 * @property {String | Number}        minDate                最小的可选日期     (默认 0 ) 
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 * @property {String | Number}        maxDate                最大可选日期  (默认 0 ) 
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 * @property {Array | String| Date}    defaultDate            默认选中的日期,mode为multiple或range是必须为数组格式 
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 * @property {String | Number}        maxCount            mode=multiple时,最多可选多少个日期  (默认     Number.MAX_SAFE_INTEGER  ) 
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 * @property {String | Number}        rowHeight            日期行高 (默认 56 ) 
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 * @property {Function}                formatter            日期格式化函数 
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 * @property {Boolean}                showLunar            是否显示农历  (默认 false ) 
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 * @property {Boolean}                showMark            是否显示月份背景色 (默认 true ) 
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 * @property {String}                confirmText            确定按钮的文字 (默认 '确定' ) 
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 * @property {String}                confirmDisabledText    确认按钮处于禁用状态时的文字 (默认 '确定' ) 
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 * @property {Boolean}                show                是否显示日历弹窗 (默认 false ) 
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 * @property {Boolean}                closeOnClickOverlay    是否允许点击遮罩关闭日历 (默认 false ) 
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 * @property {Boolean}                readonly            是否为只读状态,只读状态下禁止选择日期 (默认 false ) 
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 * @property {String | Number}        maxRange            日期区间最多可选天数,默认无限制,mode = range时有效 
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 * @property {String}                rangePrompt            范围选择超过最多可选天数时的提示文案,mode = range时有效 
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 * @property {Boolean}                showRangePrompt        范围选择超过最多可选天数时,是否展示提示文案,mode = range时有效 (默认 true ) 
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 * @property {Boolean}                allowSameDay        是否允许日期范围的起止时间为同一天,mode = range时有效 (默认 false ) 
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 * @property {Number|String}        round                圆角值,默认无圆角  (默认 0 ) 
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 * @property {Number|String}        monthNum            最多展示的月份数量  (默认 3 ) 
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 * 
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 * @event {Function()} confirm         点击确定按钮时触发        选择日期相关的返回参数 
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 * @event {Function()} close         日历关闭时触发            可定义页面关闭时的回调事件 
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 * @example <u-calendar  :defaultDate="defaultDateMultiple" :show="show" mode="multiple" @confirm="confirm"> 
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    </u-calendar> 
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 * */ 
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export default { 
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    name: 'u-calendar', 
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    mixins: [uni.$u.mpMixin, uni.$u.mixin, props], 
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    components: { 
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        uHeader, 
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        uMonth 
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    }, 
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    data() { 
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        return { 
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            // 需要显示的月份的数组 
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            months: [], 
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            // 在月份滚动区域中,当前视图中月份的index索引 
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            monthIndex: 0, 
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            // 月份滚动区域的高度 
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            listHeight: 0, 
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            // month组件中选择的日期数组 
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            selected: [], 
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            scrollIntoView: '', 
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            scrollTop:0, 
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            // 过滤处理方法 
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            innerFormatter: (value) => value 
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        } 
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    }, 
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    watch: { 
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        selectedChange: { 
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            immediate: true, 
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            handler(n) { 
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                this.setMonth() 
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            } 
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        }, 
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        // 打开弹窗时,设置月份数据 
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        show: { 
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            immediate: true, 
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            handler(n) { 
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                this.setMonth() 
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            } 
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        } 
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    }, 
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    computed: { 
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        // 由于maxDate和minDate可以为字符串(2021-10-10),或者数值(时间戳),但是dayjs如果接受字符串形式的时间戳会有问题,这里进行处理 
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        innerMaxDate() { 
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            return uni.$u.test.number(this.maxDate) 
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                ? Number(this.maxDate) 
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                : this.maxDate 
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        }, 
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        innerMinDate() { 
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            return uni.$u.test.number(this.minDate) 
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                ? Number(this.minDate) 
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                : this.minDate 
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        }, 
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        // 多个条件的变化,会引起选中日期的变化,这里统一管理监听 
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        selectedChange() { 
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            return [this.innerMinDate, this.innerMaxDate, this.defaultDate] 
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        }, 
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        subtitle() { 
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            // 初始化时,this.months为空数组,所以需要特别判断处理 
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            if (this.months.length) { 
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                return `${this.months[this.monthIndex].year}年${ 
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                    this.months[this.monthIndex].month 
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                }月` 
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            } else { 
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                return '' 
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            } 
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        }, 
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        buttonDisabled() { 
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            // 如果为range类型,且选择的日期个数不足1个时,让底部的按钮出于disabled状态 
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            if (this.mode === 'range') { 
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                if (this.selected.length <= 1) { 
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                    return true 
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                } else { 
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                    return false 
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                } 
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            } else { 
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                return false 
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            } 
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        } 
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    }, 
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    mounted() { 
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        this.start = Date.now() 
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        this.init() 
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    }, 
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    methods: { 
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        // 在微信小程序中,不支持将函数当做props参数,故只能通过ref形式调用 
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        setFormatter(e) { 
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            this.innerFormatter = e 
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        }, 
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        // month组件内部选择日期后,通过事件通知给父组件 
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        monthSelected(e) { 
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            this.selected = e 
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            if (!this.showConfirm) { 
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                // 在不需要确认按钮的情况下,如果为单选,或者范围多选且已选长度大于2,则直接进行返还 
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                if ( 
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                    this.mode === 'multiple' || 
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                    this.mode === 'single' || 
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                    (this.mode === 'range' && this.selected.length >= 2) 
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                ) { 
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                    this.$emit('confirm', this.selected) 
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                } 
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            } 
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        }, 
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        init() { 
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            // 校验maxDate,不能小于minDate 
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            if ( 
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                this.innerMaxDate && 
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                this.innerMinDate && 
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                new Date(this.innerMaxDate).getTime() < new Date(this.innerMinDate).getTime() 
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            ) { 
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                return uni.$u.error('maxDate不能小于minDate') 
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            } 
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            // 滚动区域的高度 
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            this.listHeight = this.rowHeight * 5 + 30 
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            this.setMonth() 
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        }, 
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        close() { 
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            this.$emit('close') 
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        }, 
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        // 点击确定按钮 
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        confirm() { 
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            if (!this.buttonDisabled) { 
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                this.$emit('confirm', this.selected) 
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            } 
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        }, 
 | 
        // 获得两个日期之间的月份数 
 | 
        getMonths(minDate, maxDate) { 
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            const minYear = dayjs(minDate).year() 
 | 
            const minMonth = dayjs(minDate).month() + 1 
 | 
            const maxYear = dayjs(maxDate).year() 
 | 
            const maxMonth = dayjs(maxDate).month() + 1 
 | 
            return (maxYear - minYear) * 12 + (maxMonth - minMonth) + 1 
 | 
        }, 
 | 
        // 设置月份数据 
 | 
        setMonth() { 
 | 
            // 最小日期的毫秒数 
 | 
            const minDate = this.innerMinDate || dayjs().valueOf() 
 | 
            // 如果没有指定最大日期,则往后推3个月 
 | 
            const maxDate = 
 | 
                this.innerMaxDate || 
 | 
                dayjs(minDate) 
 | 
                    .add(this.monthNum - 1, 'month') 
 | 
                    .valueOf() 
 | 
            // 最大最小月份之间的共有多少个月份, 
 | 
            const months = uni.$u.range( 
 | 
                1, 
 | 
                this.monthNum, 
 | 
                this.getMonths(minDate, maxDate) 
 | 
            ) 
 | 
            // 先清空数组 
 | 
            this.months = [] 
 | 
            for (let i = 0; i < months; i++) { 
 | 
                this.months.push({ 
 | 
                    date: new Array( 
 | 
                        dayjs(minDate).add(i, 'month').daysInMonth() 
 | 
                    ) 
 | 
                        .fill(1) 
 | 
                        .map((item, index) => { 
 | 
                            // 日期,取值1-31 
 | 
                            let day = index + 1 
 | 
                            // 星期,0-6,0为周日 
 | 
                            const week = dayjs(minDate) 
 | 
                                .add(i, 'month') 
 | 
                                .date(day) 
 | 
                                .day() 
 | 
                            const date = dayjs(minDate) 
 | 
                                .add(i, 'month') 
 | 
                                .date(day) 
 | 
                                .format('YYYY-MM-DD') 
 | 
                            let bottomInfo = '' 
 | 
                            if (this.showLunar) { 
 | 
                                // 将日期转为农历格式 
 | 
                                const lunar = Calendar.solar2lunar( 
 | 
                                    dayjs(date).year(), 
 | 
                                    dayjs(date).month() + 1, 
 | 
                                    dayjs(date).date() 
 | 
                                ) 
 | 
                                bottomInfo = lunar.IDayCn 
 | 
                            } 
 | 
                            let config = { 
 | 
                                day, 
 | 
                                week, 
 | 
                                // 小于最小允许的日期,或者大于最大的日期,则设置为disabled状态 
 | 
                                disabled: 
 | 
                                    dayjs(date).isBefore( 
 | 
                                        dayjs(minDate).format('YYYY-MM-DD') 
 | 
                                    ) || 
 | 
                                    dayjs(date).isAfter( 
 | 
                                        dayjs(maxDate).format('YYYY-MM-DD') 
 | 
                                    ), 
 | 
                                // 返回一个日期对象,供外部的formatter获取当前日期的年月日等信息,进行加工处理 
 | 
                                date: new Date(date), 
 | 
                                bottomInfo, 
 | 
                                dot: false, 
 | 
                                month: 
 | 
                                    dayjs(minDate).add(i, 'month').month() + 1 
 | 
                            } 
 | 
                            const formatter = 
 | 
                                this.formatter || this.innerFormatter 
 | 
                            return formatter(config) 
 | 
                        }), 
 | 
                    // 当前所属的月份 
 | 
                    month: dayjs(minDate).add(i, 'month').month() + 1, 
 | 
                    // 当前年份 
 | 
                    year: dayjs(minDate).add(i, 'month').year() 
 | 
                }) 
 | 
            } 
 | 
  
 | 
        }, 
 | 
        // 滚动到默认设置的月份 
 | 
        scrollIntoDefaultMonth(selected) { 
 | 
            // 查询默认日期在可选列表的下标 
 | 
            const _index = this.months.findIndex(({ 
 | 
                  year, 
 | 
                  month 
 | 
              }) => { 
 | 
                month = uni.$u.padZero(month) 
 | 
                return `${year}-${month}` === selected 
 | 
            }) 
 | 
            if (_index !== -1) { 
 | 
                // #ifndef MP-WEIXIN 
 | 
                this.$nextTick(() => { 
 | 
                    this.scrollIntoView = `month-${_index}` 
 | 
                }) 
 | 
                // #endif 
 | 
                // #ifdef MP-WEIXIN 
 | 
                this.scrollTop = this.months[_index].top || 0; 
 | 
                // #endif 
 | 
            } 
 | 
        }, 
 | 
        // scroll-view滚动监听 
 | 
        onScroll(event) { 
 | 
            // 不允许小于0的滚动值,如果scroll-view到顶了,继续下拉,会出现负数值 
 | 
            const scrollTop = Math.max(0, event.detail.scrollTop) 
 | 
            // 将当前滚动条数值,除以滚动区域的高度,可以得出当前滚动到了哪一个月份的索引 
 | 
            for (let i = 0; i < this.months.length; i++) { 
 | 
                if (scrollTop >= (this.months[i].top || this.listHeight)) { 
 | 
                    this.monthIndex = i 
 | 
                } 
 | 
            } 
 | 
        }, 
 | 
        // 更新月份的top值 
 | 
        updateMonthTop(topArr = []) { 
 | 
            // 设置对应月份的top值,用于onScroll方法更新月份 
 | 
            topArr.map((item, index) => { 
 | 
                this.months[index].top = item 
 | 
            }) 
 | 
  
 | 
            // 获取默认日期的下标 
 | 
            if (!this.defaultDate) { 
 | 
                // 如果没有设置默认日期,则将当天日期设置为默认选中的日期 
 | 
                const selected = dayjs().format("YYYY-MM") 
 | 
                this.scrollIntoDefaultMonth(selected) 
 | 
                return 
 | 
            } 
 | 
            let selected = dayjs().format("YYYY-MM"); 
 | 
            // 单选模式,可以是字符串或数组,Date对象等 
 | 
            if (!uni.$u.test.array(this.defaultDate)) { 
 | 
                selected = dayjs(this.defaultDate).format("YYYY-MM") 
 | 
            } else { 
 | 
                selected = dayjs(this.defaultDate[0]).format("YYYY-MM"); 
 | 
            } 
 | 
            this.scrollIntoDefaultMonth(selected) 
 | 
        } 
 | 
    } 
 | 
} 
 | 
</script> 
 | 
  
 | 
<style lang="scss" scoped> 
 | 
@import '../../libs/css/components.scss'; 
 | 
  
 | 
.u-calendar { 
 | 
    &__confirm { 
 | 
        padding: 7px 18px; 
 | 
    } 
 | 
} 
 | 
</style> 
 |