319 lines
		
	
	
		
			8.9 KiB
		
	
	
	
		
			Vue
		
	
	
	
			
		
		
	
	
			319 lines
		
	
	
		
			8.9 KiB
		
	
	
	
		
			Vue
		
	
	
	
<template>
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	<view class="u-countdown">
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		<view class="u-countdown-item" :style="[itemStyle]" v-if="showDays && (hideZeroDay || (!hideZeroDay && d != '00'))">
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			<view class="u-countdown-time" :style="[letterStyle]">
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				{{ d }}
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			</view>
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		</view>
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		<view
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			class="u-countdown-colon"
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			:style="{fontSize: separatorSize + 'rpx', color: separatorColor, paddingBottom: separator == 'colon' ? '4rpx' : 0}"
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			v-if="showDays && (hideZeroDay || (!hideZeroDay && d != '00'))"
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		>
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			{{ separator == 'colon' ? ':' : '天' }}
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		</view>
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		<view class="u-countdown-item" :style="[itemStyle]" v-if="showHours">
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			<view class="u-countdown-time" :style="{ fontSize: fontSize + 'rpx', color: color}">
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				{{ h }}
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			</view>
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		</view>
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		<view
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			class="u-countdown-colon"
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			:style="{fontSize: separatorSize + 'rpx', color: separatorColor, paddingBottom: separator == 'colon' ? '4rpx' : 0}"
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			v-if="showHours"
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		>
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			{{ separator == 'colon' ? ':' : '时' }}
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		</view>
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		<view class="u-countdown-item" :style="[itemStyle]" v-if="showMinutes">
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			<view class="u-countdown-time" :style="{ fontSize: fontSize + 'rpx', color: color}">
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				{{ i }}
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			</view>
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		</view>
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		<view
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			class="u-countdown-colon"
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			:style="{fontSize: separatorSize + 'rpx', color: separatorColor, paddingBottom: separator == 'colon' ? '4rpx' : 0}"
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			v-if="showMinutes"
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		>
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			{{ separator == 'colon' ? ':' : '分' }}
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		</view>
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		<view class="u-countdown-item" :style="[itemStyle]" v-if="showSeconds">
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			<view class="u-countdown-time" :style="{ fontSize: fontSize + 'rpx', color: color}">
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				{{ s }}
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			</view>
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		</view>
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		<view
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			class="u-countdown-colon"
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			:style="{fontSize: separatorSize + 'rpx', color: separatorColor, paddingBottom: separator == 'colon' ? '4rpx' : 0}"
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			v-if="showSeconds && separator == 'zh'"
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		>
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			秒
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		</view>
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	</view>
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</template>
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<script>
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/**
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 * countDown 倒计时
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 * @description 该组件一般使用于某个活动的截止时间上,通过数字的变化,给用户明确的时间感受,提示用户进行某一个行为操作。
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 * @tutorial https://www.uviewui.com/components/countDown.html
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 * @property {String Number} timestamp 倒计时,单位为秒
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 * @property {Boolean} autoplay 是否自动开始倒计时,如果为false,需手动调用开始方法。见官网说明(默认true)
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 * @property {String} separator 分隔符,colon为英文冒号,zh为中文(默认colon)
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 * @property {String Number} separator-size 分隔符的字体大小,单位rpx(默认30)
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 * @property {String} separator-color 分隔符的颜色(默认#303133)
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 * @property {String Number} font-size 倒计时字体大小,单位rpx(默认30)
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 * @property {Boolean} show-border 是否显示倒计时数字的边框(默认false)
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 * @property {Boolean} hide-zero-day 当"天"的部分为0时,隐藏该字段 (默认true)
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 * @property {String} border-color 数字边框的颜色(默认#303133)
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 * @property {String} bg-color 倒计时数字的背景颜色(默认#ffffff)
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 * @property {String} color 倒计时数字的颜色(默认#303133)
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 * @property {String} height 数字高度值(宽度等同此值),设置边框时看情况是否需要设置此值,单位rpx(默认auto)
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 * @property {Boolean} show-days 是否显示倒计时的"天"部分(默认true)
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 * @property {Boolean} show-hours 是否显示倒计时的"时"部分(默认true)
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 * @property {Boolean} show-minutes 是否显示倒计时的"分"部分(默认true)
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 * @property {Boolean} show-seconds 是否显示倒计时的"秒"部分(默认true)
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 * @event {Function} end 倒计时结束
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 * @event {Function} change 每秒触发一次,回调为当前剩余的倒计秒数
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 * @example <u-count-down ref="uCountDown" :timestamp="86400" :autoplay="false"></u-count-down>
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 */
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export default {
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	name: 'u-count-down',
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	props: {
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		// 倒计时的时间,秒为单位
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		timestamp: {
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			type: [Number, String],
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			default: 0
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		},
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		// 是否自动开始倒计时
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		autoplay: {
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			type: Boolean,
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			default: true
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		},
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		// 用英文冒号(colon)或者中文(zh)当做分隔符,false的时候为中文,如:"11:22"或"11时22秒"
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		separator: {
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			type: String,
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			default: 'colon'
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		},
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		// 分隔符的大小,单位rpx
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		separatorSize: {
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			type: [Number, String],
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			default: 30
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		},
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		// 分隔符颜色
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		separatorColor: {
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			type: String,
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			default: "#303133"
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		},
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		// 字体颜色
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		color: {
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			type: String,
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			default: '#303133'
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		},
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		// 字体大小,单位rpx
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		fontSize: {
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			type: [Number, String],
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			default: 30
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		},
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		// 背景颜色
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		bgColor: {
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			type: String,
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			default: '#fff'
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		},
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		// 数字框高度,单位rpx
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		height: {
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			type: [Number, String],
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			default: 'auto'
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		},
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		// 是否显示数字框
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		showBorder: {
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			type: Boolean,
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			default: false
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		},
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		// 边框颜色
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		borderColor: {
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			type: String,
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			default: '#303133'
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		},
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		// 是否显示秒
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		showSeconds: {
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			type: Boolean,
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			default: true
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		},
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		// 是否显示分钟
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		showMinutes: {
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			type: Boolean,
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			default: true
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		},
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		// 是否显示小时
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		showHours: {
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			type: Boolean,
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			default: true
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		},
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		// 是否显示“天”
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		showDays: {
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			type: Boolean,
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			default: true
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		},
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		// 当"天"的部分为0时,不显示
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		hideZeroDay: {
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			type: Boolean,
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			default: false
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		}
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	},
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	watch: {
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		// 监听时间戳的变化
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		timestamp(newVal, oldVal) {
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			// 如果倒计时间发生变化,清除定时器,重新开始倒计时
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			this.clearTimer();
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			this.start();
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		}
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	},
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	data() {
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		return {
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			d: '00', // 天的默认值
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			h: '00', // 小时的默认值
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			i: '00', // 分钟的默认值
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			s: '00', // 秒的默认值
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			timer: null ,// 定时器
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			seconds: 0, // 记录不停倒计过程中变化的秒数
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		};
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	},
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	computed: {
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		// 倒计时item的样式,item为分别的时分秒部分的数字
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		itemStyle() {
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			let style = {};
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			if(this.height) {
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				style.height = this.height + 'rpx';
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				style.width = this.height + 'rpx';
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			}
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			if(this.showBorder) {
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				style.borderStyle = 'solid';
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				style.borderColor = this.borderColor;
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				style.borderWidth = '1px';
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			}
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			if(this.bgColor) {
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				style.backgroundColor = this.bgColor;
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			}
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			return style;
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		},
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		// 倒计时数字的样式
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		letterStyle() {
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			let style = {};
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			if(this.fontSize) style.fontSize = this.fontSize +  'rpx';
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			if(this.color) style.color = this.color;
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			return style;
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		}
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	},
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	mounted() {
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		// 如果自动倒计时
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		this.autoplay && this.timestamp && this.start();
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	},
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	methods: {
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		// 倒计时
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		start() {
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			// 避免可能出现的倒计时重叠情况
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			this.clearTimer();
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			if (this.timestamp <= 0) return;
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			this.seconds = Number(this.timestamp);
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			this.formatTime(this.seconds);
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			this.timer = setInterval(() => {
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				this.seconds--;
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				// 发出change事件
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				this.$emit('change', this.seconds);
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				if (this.seconds < 0) {
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					return this.end();
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				}
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				this.formatTime(this.seconds);
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			}, 1000);
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		},
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		// 格式化时间
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		formatTime(seconds) {
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			// 小于等于0的话,结束倒计时
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			seconds <= 0 && this.end();
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			let [day, hour, minute, second] = [0, 0, 0, 0];
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			day = Math.floor(seconds / (60 * 60 * 24));
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			// 判断是否显示“天”参数,如果不显示,将天部分的值,加入到小时中
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			// hour为给后面计算秒和分等用的(基于显示天的前提下计算)
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			hour = Math.floor(seconds / (60 * 60)) - day * 24;
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			// showHour为需要显示的小时
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			let showHour = null;
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			if(this.showDays) {
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				showHour = hour;
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			} else {
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				// 如果不显示天数,将“天”部分的时间折算到小时中去
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				showHour = Math.floor(seconds / (60 * 60));
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			}
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			minute = Math.floor(seconds / 60) - hour * 60 - day * 24 * 60;
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			second = Math.floor(seconds) - day * 24 * 60 * 60 - hour * 60 * 60 - minute * 60;
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			// 如果小于10,在前面补上一个"0"
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			showHour = showHour < 10 ? '0' + showHour : showHour;
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			minute = minute < 10 ? '0' + minute : minute;
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			second = second < 10 ? '0' + second : second;
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			day = day < 10 ? '0' + day : day;
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			this.d = day;
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			this.h = showHour;
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			this.i = minute;
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			this.s = second;
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		},
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		// 停止倒计时
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		end() {
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			this.clearTimer();
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			this.$emit('end', {});
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		},
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		// 清除定时器
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		clearTimer() {
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			if(this.timer) {
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				// 清除定时器
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				clearInterval(this.timer);
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				this.timer = null;
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			}
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		}
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	},
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	beforeDestroy() {
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		clearInterval(this.timer);
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		this.timer = null;
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	}
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};
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</script>
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<style scoped lang="scss">
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	@import "../../libs/css/style.components.scss";
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	.u-countdown {
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		/* #ifndef APP-NVUE */
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		display: inline-flex;		
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		/* #endif */
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		align-items: center;
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	}
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	.u-countdown-item {
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		@include vue-flex;
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		align-items: center;
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		justify-content: center;
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		padding: 2rpx;
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		border-radius: 6rpx;
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		white-space: nowrap;
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		transform: translateZ(0);
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	}
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	.u-countdown-time {
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		margin: 0;
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		padding: 0;
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		line-height: 1;
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	}
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	.u-countdown-colon {
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		@include vue-flex;
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		justify-content: center;
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		padding: 0 5rpx;
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		line-height: 1;
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		align-items: center;
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		padding-bottom: 4rpx;
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	}
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	.u-countdown-scale {
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		transform: scale(0.9);
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		transform-origin: center center;
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	}
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</style>
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