zhgdyunapp/components/dateTimePicker/index.vue

<template>
	<view class="datatime">
		<picker  mode="multiSelector" :range="range" range-key="text" @change="change" @tap="cilckPicker" @columnchange="columnchange" :value="value" :disabled="disabled">
			<view  class="content flex justify" :class="{ placeholder: !dateStr }">
				<text >{{ dateStr ? dateStr : placeholder }}</text>
				<text class="iconfont icon-xiangyou"></text>
			</view>
		</picker>
	</view>
</template>

<script>
import utils from '@/common/utils.js'; // 封装的工具集
export default {
	/**
	 * 数据
	 */
	props: {
		// 是否禁用
		disabled: {
			type: Boolean,
			default: false
		},

		// 占位符
		placeholder: {
			type: String,
			default: '请选择日期时间'
		},

		// 表示有效日期时间范围的开始，
		// 字符串格式为 "YYYY-MM-DD hh:mm"
		start: {
			type: String,
			default: '1970-1-1 00:00'
		},

		// 表示有效日期时间范围的结束
		// 字符串格式为 "YYYY-MM-DD hh:mm"
		end: {
			type: String,
			default: '2300-1-1 00:00'
		},

		// 表示选择器的粒度，有效值：year | month | day | hour | minute
		fields: {
			type: String,
			default: 'minute'
		},

		// 默认值
		// 字符串格式为 "YYYY-MM-DD hh:mm"
		defaultValue: {
			type: String,
			default: ''
		}
	},

	/**
	 * 数据
	 */
	data() {
		return {
			range: [],
			value: [],
			dateStr: '', // 最终显示的字符串
			dtStart: null, // 有效范围开始
			dtEnd: null, // 有效范围结束
		};
	},
	
	/**
	 * 监听数据
	 */ 
	watch: {
		// 默认值
		defaultValue() {
			// 设置默认值
			this.setDefaultValue();
		}
	},

	/**
	 * 组件初次加载完成
	 */
	mounted() {
		
        this.setStartAndEndTime()
		// 设置默认值
		this.setDefaultValue();
	},
     
	/**
	 * 方法
	 */
	methods: {
		setStartAndEndTime(){
			// 有效日期开始和结束
			let start = this.start;
			let end = this.end;
		
			// 验证是否是有效的开始和结束日期
			if(!utils.isString(this.start)) {
				
				start = '1970-1-1 00:00';
			}
			if(!utils.isString(this.start)) {
				
				start = '2300-1-1 00:00';
			}
			
			// 将开始日期和结束日期转为 Date 
			let dtStart = utils.formatDate(start).dt;
			let dtEnd = utils.formatDate(end).dt;
			
			// 判断有效日期结束是否大于有效日期开始，如果不是，则将有效日期结束修改为有效日期开始往后300年
			if (dtEnd <= dtStart) {
				dtEnd = utils.formatDate(start).dt;
				dtEnd.setFullYear(dtStart.getFullYear() + 300);
				dtEnd.setDate(dtEnd.getDate() - 1);
			}
			
			// 更新开始日期和结束日期
			this.dtStart = dtStart;
			this.dtEnd = dtEnd;
		},
		cilckPicker(){
			this.setStartAndEndTime()
			// 设置默认值
			this.setDefaultValue();
			// this.$emit('cilckPicker',)
		},
		/**
		 * 确认选择
		 */
		change(event) {
			console.log(this.fields,777888999)
			let year, month, day, hour, minute, second;
			if(this.fields == 'year') {
				year = this.range[0][this.value[0]].number; // 年
				let dtStr = `${year}`;
				this.setDateStr(dtStr);
				this.$emit('change', utils.formatDate(dtStr));
				return;
			}
			else if(this.fields == 'month') {
				year = this.range[0][this.value[0]].number; // 年
				month = this.range[1][this.value[1]].number; // 月
				let dtStr = `${year}-${month}`;
				this.setDateStr(dtStr);
        
				this.$emit('change', utils.formatDate(dtStr));
				return;
			}
			else if(this.fields == 'day') {
				year = this.range[0][this.value[0]].number; // 年
				month = this.range[1][this.value[1]].number; // 月
				day = this.range[2][this.value[2]].number; // 日
				let dtStr = `${year}-${month}-${day}`;
				this.setDateStr(dtStr);
				this.$emit('change', utils.formatDate(dtStr));
				return;
			}
			else if(this.fields == 'hour') {
				year = this.range[0][this.value[0]].number; // 年
				month = this.range[1][this.value[1]].number; // 月
				day = this.range[2][this.value[2]].number; // 日
				hour = this.range[3][this.value[3]].number; // 时
				day = this.range[2][this.value[2]].number; // 日
				let dtStr = `${year}-${month}-${day} ${hour}`;
				this.setDateStr(dtStr);
				this.$emit('change', utils.formatDate(dtStr));
				return;
			}
			else if(this.fields == 'minute') {
				year = this.range[0][this.value[0]].number; // 年
				month = this.range[1][this.value[1]].number; // 月
				day = this.range[2][this.value[2]].number; // 日
				hour = this.range[3][this.value[3]].number; // 时
				minute = this.range[4][this.value[4]].number; // 分
				let dtStr = `${year}-${month}-${day} ${hour}:${minute}`;
				this.setDateStr(dtStr);
				this.$emit('change', utils.formatDate(dtStr));
				return;
			}
      else if(this.fields == 'second') {
      	year = this.range[0][this.value[0]].number; // 年
      	month = this.range[1][this.value[1]].number; // 月
      	day = this.range[2][this.value[2]].number; // 日
      	hour = this.range[3][this.value[3]].number; // 时
      	minute = this.range[4][this.value[4]].number; // 分
      	second = this.range[5][this.value[5]].number; // 秒
      	let dtStr = `${year}-${month}-${day} ${hour}:${minute}:${second}`;
      	this.setDateStr(dtStr);
      	this.$emit('change', utils.formatDate(dtStr));
      	return;
      }
			
			
		},

		/**
		 * 设置显示的值
		 * @param {Date|String} date 日期字符串或日期对象
		 */
		setDateStr(date) {
			let dt = utils.formatDate(date);
			if(this.fields == 'year') {
				this.dateStr = `${dt.YYYY}年`;
				return;
			}
			if(this.fields == 'month') {
				this.dateStr = `${dt.YYYY}年${dt.MM}月`;
				return;
			}
			if(this.fields == 'day') {
				this.dateStr = `${dt.YYYY}年${dt.MM}月${dt.DD}日`;
				return;
			}
			if(this.fields == 'hour') {
				this.dateStr = `${dt.YYYY}年${dt.MM}月${dt.DD}日 ${dt.hh}时`;
				return;
			}
			if(this.fields == 'minute') {
				this.dateStr = `${dt.YYYY}年${dt.MM}月${dt.DD}日 ${dt.hh}时 ${dt.mm}分`;
				return;
			}
			this.dateStr = `${dt.YYYY}-${dt.MM}-${dt.DD} ${dt.hh}:${dt.mm}:${dt.ss}`;
		},
		
		/**
		 * 设置年数据
		 */ 
		setYearData() {
			// 有效日期
			let yearStart = this.dtStart.getFullYear();
			let yearEnd = this.dtEnd.getFullYear();
			// 年
			let years = [];
			for (let year = yearStart; year <= yearEnd; year++) {
				let item = {
					number: year,
					text: `${year}年`,
				};
				years.push(item);
			}
			this.range.splice(0, 1, years);
		},
		
		/**
		 * 设置月数据
		 * @param {Number} year 年 
		 */ 
		setMonthData(year) {
			// 有效日期
			let yearStart = this.dtStart.getFullYear();
			let monthStart = this.dtStart.getMonth() + 1;
			let yearEnd = this.dtEnd.getFullYear();
			let monthEnd = this.dtEnd.getMonth() + 1;
			
			// 月
			let months = [];
			let monthStartIndex = year == yearStart ? monthStart : 1;
			let monthEndIndex = year == yearEnd ? monthEnd : 12;
			for (let month = monthStartIndex; month <= monthEndIndex; month++) {
				let item = {
					number: month,
					text: `${month}月`,
				};
				months.push(item);
			}
			this.range.splice(1, 1, months);
		},
		
		/**
		 * 设置日数据
		 * @param {Number} year 年 
		 * @param {Number} month 月 
		 */ 
		setDayData(year, month) {
			// 有效日期
			let yearStart = this.dtStart.getFullYear();
			let monthStart = this.dtStart.getMonth() + 1;
			let dayStart = this.dtStart.getDate();
			let yearEnd = this.dtEnd.getFullYear();
			let monthEnd = this.dtEnd.getMonth() + 1;
			let dayEnd = this.dtEnd.getDate();
			
			// 日
			let days = [];
			let dayStartIndex = year == yearStart && month == monthStart ? dayStart : 1;
			let dayEndIndex; 
			if(year == yearEnd && month == monthEnd) {
				dayEndIndex = dayEnd;
			} else {
				dayEndIndex = (new Date(year, month, 0)).getDate();
			}
			for (let day = dayStartIndex; day <= dayEndIndex; day++) {
				let item = {
					number: day,
					text: `${day}日`,
				};
				days.push(item);
			}
			this.range.splice(2, 1, days);
		},
		
		/**
		 * 设置时数据
		 * @param {Number} year 年 
		 * @param {Number} month 月 
		 * @param {Number} day 日 
		 */ 
		setHourData(year, month, day) {
			// 有效日期
			let yearStart = this.dtStart.getFullYear();
			let monthStart = this.dtStart.getMonth() + 1;
			let dayStart = this.dtStart.getDate();
			let hourStart = this.dtStart.getHours();
			let yearEnd = this.dtEnd.getFullYear();
			let monthEnd = this.dtEnd.getMonth() + 1;
			let dayEnd = this.dtEnd.getDate();
			let hourEnd = this.dtEnd.getHours();
			
			// 时
			let hours = [];
			let hourStartIndex = year == yearStart && month == monthStart && day == dayStart ? hourStart : 0;
			let hourEndIndex = year == yearEnd && month == monthEnd && day == dayEnd ? hourEnd : 23;
			for (let hour = hourStartIndex; hour <= hourEndIndex; hour++) {
				let item = {
					number: hour,
					text: `${hour}时`,
				};
				hours.push(item);
			}
			this.range.splice(3, 1, hours);
		},
		
		/**
		 * 设置分数据
		 * @param {Number} year 年 
		 * @param {Number} month 月 
		 * @param {Number} day 日
		 * @param {Number} hour 时
		 */ 
		setMinuteData(year, month, day, hour) {
			// 有效日期
			let yearStart = this.dtStart.getFullYear();
			let monthStart = this.dtStart.getMonth() + 1;
			let dayStart = this.dtStart.getDate();
			let hourStart = this.dtStart.getHours();
			let minuteStart = this.dtStart.getMinutes();
			let yearEnd = this.dtEnd.getFullYear();
			let monthEnd = this.dtEnd.getMonth() + 1;
			let dayEnd = this.dtEnd.getDate();
			let hourEnd = this.dtEnd.getHours();
			let minuteEnd = this.dtEnd.getMinutes();
			
			// 分
			let minutes = [];
			let minuteStartIndex = year == yearStart && month == monthStart && day == dayStart && hour == hourStart ? minuteStart : 0;
			let minuteEndIndex = year == yearEnd && month == monthEnd && day == dayEnd && hour == hourEnd ? minuteEnd : 59;
			for(let minute = minuteStartIndex; minute <= minuteEndIndex; minute++) {
				let item = {
					number: minute,
					text: `${minute}分`,
				}
				minutes.push(item);
			}
			this.range.splice(4, 1, minutes);
		},
		
		/**
		 * 设置秒数据
		 * @param {Number} year 年 
		 * @param {Number} month 月 
		 * @param {Number} day 日
		 * @param {Number} hour 时
		 * @param {Number} minute 分
		 */ 
		setSecondData(year, month, day, hour, minute) {
			// 有效日期
			let yearStart = this.dtStart.getFullYear();
			let monthStart = this.dtStart.getMonth() + 1;
			let dayStart = this.dtStart.getDate();
			let hourStart = this.dtStart.getHours();
			let minuteStart = this.dtStart.getMinutes();
			let secondStart = this.dtStart.getSeconds();
			let yearEnd = this.dtEnd.getFullYear();
			let monthEnd = this.dtEnd.getMonth() + 1;
			let dayEnd = this.dtEnd.getDate();
			let hourEnd = this.dtEnd.getHours();
			let minuteEnd = this.dtEnd.getMinutes();
			let secondEnd = this.dtEnd.getSeconds();
			
			// 秒
			let seconds = [];
			let secondStartIndex = year == yearStart && month == monthStart && day == dayStart && hour == hourStart && minute == minuteStart ? secondStart : 0;
			let secondEndIndex = year == yearEnd && month == monthEnd && day == dayEnd && hour == hourEnd && minute == minuteEnd ? secondEnd : 59;
			for(let second = secondStartIndex; second <= secondEndIndex; second++) {
				let item = {
					number: second,
					text: `${second}秒`,
				}
				seconds.push(item);
			}
			this.range.splice(5, 1, seconds);
		},
		
		/**
		 * 设置默认值
		 */
		setDefaultValue() {
			// 默认日期
			let dtDefault;
			
			// 开始日期和结束日期
			let dtStart = this.dtStart;
			let dtEnd = this.dtEnd;
			
			// 判断是否传了默认日期
			// 传了默认日期，格式化默认日期为日期对象
			if(this.defaultValue) {
				dtDefault = utils.formatDate(this.defaultValue).dt;
			} 
			// 如果没有传默认日期，将默认日期设置为当前日期
			else {
				dtDefault = new Date();
			}
			
			// 如果默认日期不在有效日期范围内，设置默认日期为有效日期开始值
			if (dtDefault < dtStart || dtDefault > dtEnd) {
				dtDefault = dtStart;
			}
			
			// 更新 dateStr
			if(this.defaultValue) this.setDateStr(dtDefault);
			
			// 默认值相关数据
			let dfYear = dtDefault.getFullYear();
			let dfMonth = dtDefault.getMonth() + 1;
			let dfDay = dtDefault.getDate();
			let dfHour = dtDefault.getHours();
			let dfMinute = dtDefault.getMinutes();
			let dfSecond = dtDefault.getSeconds();
			console.log(this.range,'我爱你')
			// 设置年数据
			this.setYearData();
			// 设置 Year 这一列的 value 值
			let yearIndex = this.range[0].findIndex(year => {
				return dfYear == year.number;
			});
			this.value.splice(0, 1, yearIndex >= 0 ? yearIndex : 0);
			
			// 设置月数据
			if(this.fields == 'year') return;
			this.setMonthData(dfYear);
			// 设置 Month 这一列的 value 值
			let monthIndex = this.range[1].findIndex(month => {
				return dfMonth == month.number;
			});
			this.value.splice(1, 1, monthIndex >=0 ? monthIndex : 0);
			
			// 设置日数据
			if(this.fields == 'month') return;
			this.setDayData(dfYear, dfMonth);
			// 设置 Day 这一列的 value 值
			let dayIndex = this.range[2].findIndex(day => {
				return dfDay == day.number;
			});
			this.value.splice(2, 1, dayIndex >=0 ? dayIndex : 0);
			
			// 设置时数据
			if(this.fields == 'day') return;
			this.setHourData(dfYear, dfMonth, dfDay);
			// 设置 Hour 这一列的 value 值
			let hourIndex = this.range[3].findIndex(hour => {
				return dfHour == hour.number;
			});
			this.value.splice(3, 1, hourIndex >=0 ? hourIndex : 0);
			
			// 设置分数据
			if(this.fields == 'hour') return;
			this.setMinuteData(dfYear, dfMonth, dfDay, dfHour);
			// 设置 Minute 这一列的 value 值
			let minuteIndex = this.range[4].findIndex(minute => {
				return dfMinute == minute.number;
			});
			this.value.splice(4, 1, minuteIndex >=0 ? minuteIndex : 0);
			
			// 设置秒数据
			if(this.fields == 'minute') return;
			this.setSecondData(dfYear, dfMonth, dfDay, dfHour, dfMinute, dfSecond);
			// 设置 Minute 这一列的 value 值
			let secondIndex = this.range[5].findIndex(second => {
				return dfSecond == second.number;
			});
			this.value.splice(5, 1, secondIndex >=0 ? secondIndex : 0);
		},

		/**
		 * 某一列的值改变时触发
		 * @param {Number} event.detail.column 表示改变了第几列（下标从0开始）
		 * @param {Number} event.detail.value 表示变更值的下标
		 */
		columnchange(event) {
			let columnIndex = event.detail.column; // 改变的列的下标
			let valueIndex = event.detail.value; // 变更值的下标
			
			// 更新改变列的 value
			this.value.splice(columnIndex, 1, valueIndex);
			
			// 改变年要更新月数据
			if(this.fields == 'year') return;
			if (columnIndex == 0) {
				// 当前选择的月
				let monthBeforeUpdate = this.range[1][this.value[1]];
				// 更新月数据
				this.setMonthData(this.range[0][this.value[0]].number);
				// 更新 Month Value
				let monthIndex = this.range[1].findIndex(month => {
					return month.number == monthBeforeUpdate.number;
				});
				this.value.splice(1, 1, monthIndex >= 0 ? monthIndex : 0);
			}
			
			// 改变年、月都要更新日数据
			if(this.fields == 'month') return;
			if (columnIndex == 0 || columnIndex == 1) {
				// 当前选择的日
				let dayBeforeUpdate = this.range[2][this.value[2]];
				// 更新日数据
				this.setDayData(this.range[0][this.value[0]].number, this.range[1][this.value[1]].number);
				// 更新 Day Value
				let dayIndex = this.range[2].findIndex(day => {
					return day.number == dayBeforeUpdate.number;
				});
				this.value.splice(2, 1, dayIndex >= 0 ? dayIndex : 0);
			}
			
			// 改变年、月、日都要更新时数据
			if(this.fields == 'day') return;
			if (columnIndex == 0 || columnIndex == 1 || columnIndex == 2) {
				// 当前选择的时
				let hourBeforeUpdate = this.range[3][this.value[3]];
				// 更新时数据
				this.setHourData(this.range[0][this.value[0]].number, this.range[1][this.value[1]].number, this.range[2][this.value[2]].number);
				// 更新 Hour Value
				let hourIndex = this.range[3].findIndex(hour => {
					return hour.number == hourBeforeUpdate.number;
				});
				this.value.splice(3, 1, hourIndex >= 0 ? hourIndex : 0);
			}
			
			// 当前选择的分
			if(this.fields == 'hour') return;
			let minuteBeforeUpdate = this.range[4][this.value[4]];
			// 更新分数据
			this.setMinuteData(this.range[0][this.value[0]].number, this.range[1][this.value[1]].number, this.range[2][this.value[2]].number, this.range[3][this.value[3]].number);
			// 更新 Minute Value
			let minuteIndex = this.range[4].findIndex(minute => {
				return minute.number == minuteBeforeUpdate.number;
			});
			this.value.splice(4, 1, minuteIndex >= 0 ? minuteIndex : 0);
			
			// 当前选择的秒
			if(this.fields == 'minute') return;
			let secondBeforeUpdate = this.range[5][this.value[5]];
			// 更新分数据
			this.setSecondData(this.range[0][this.value[0]].number, this.range[1][this.value[1]].number, this.range[2][this.value[2]].number, this.range[3][this.value[3]].number, this.range[4][this.value[4]].number);
			// 更新 Minute Value
			let secondIndex = this.range[5].findIndex(second => {
				return second.number == secondBeforeUpdate.number;
			});
			this.value.splice(5, 1, secondIndex >= 0 ? secondIndex : 0);
		},
	}
};
</script>

<style lang="scss" scoped>
.content {
	text-align: left;
}

.placeholder {
	color: #bfbfcd;
}

</style>