十、时间戳

1、动态年月日时分秒

<template>
	<view class="">
		<view>{
    {
    dateFormat(date)}}</view>
	</view>
</template>

<script>
	export default{
    
		data(){
    		
			return{
    
				date: new Date().toISOString(),	
			}
		},
		onLoad(){
    	
			let _this = this;
			setInterval(function() {
    
			_this.date = Date.parse(new Date());
			}, 1000);
		},
		methods:{
    	
			dateFormat(time) {
    
				let date = new Date(time);
				let year = date.getFullYear();
				// 在日期格式中，月份是从0开始的，因此要加0，使用三元表达式在小于10的前面加0，以达到格式统一 如 09:11:05
				let month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
				let day = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
				let hours = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
				let minutes = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
				let seconds = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
				// 拼接
				return year + "年" + month + "月" + day + "日" + hours + ":" + minutes + ":" + seconds;
				// return year + "-" + month + "-" + day;
			},
		}
	}
</script>

2、定格时间（自动回显且下拉可选）

			<view class="uni-form-item">
				<view class="title">检测时间</view>
				<view class="input_box">
					<picker mode="multiSelector" @change="changeDateTime"  @columnchange="changeDateTimeColumn" :value="dateTime" :range="dateTimeArray">
						<view class='lableBox'>
							<view class="choose-value">{
    {
    timeStr}}</view>
						</view> 
					</picker>
				</view>
			</view>

<script>
	// 时间戳
	const {
    dateTimePicker,getMonthDay} = require('../../utils/dateTimePicker')
	export default{
    
		data(){
    
			return{
    
				timeStr:'',
				dateTime: null,
				dateTimeArray: null,
			}
		},
		
		onLoad() {
    
			this.initTime();
		},
		
		methods:{
    
			// 时间戳
			initTime(){
    
				let date = new Date();
				let endYear = date.getFullYear();
				// 获取完整的年月日 时分秒，以及默认显示的数组
				let obj = dateTimePicker(this.startYear, endYear);
				// 精确到分的处理，将数组的秒去掉
				this.dateTimeArray=obj.dateTimeArray
				this.dateTime=obj.dateTime
				this.timeStr= this.createTimeStr(this.dateTimeArray,this.dateTime);
				this.form.testingTime = this.timeStr;
			},
			changeDateTime(e) {
    
			    this.dateTime = e.detail.value;
			    this.timeStr= this.createTimeStr(this.dateTimeArray,this.dateTime);
			    //ios时间不能用'-'解析成时间戳
				this.form.testingTime = this.timeStr;
			 },
			/*年,月切换时重新更新计算*/
			changeDateTimeColumn(e) {
    
				//let {id} = e.target;
				let {
    column,value} = e.detail;
				if(column==0 || column==1){
    
			        //直接修改数组下标视图不更新,用深拷贝之后替换数组
					let dateTime = JSON.parse(JSON.stringify(this.dateTime));
			        let dateTimeArray = JSON.parse(JSON.stringify(this.dateTimeArray));
					dateTime[column] = value;
					dateTimeArray[2] = getMonthDay(dateTimeArray[0][dateTime[0]], dateTimeArray[1][dateTime[1]]);
			        this.dateTime = dateTime;
			        this.dateTimeArray = dateTimeArray;
				}
			},
			createTimeStr(dateTimeArray,dateTime){
    
				let timeStr = dateTimeArray[0][dateTime[0]]+'-'+dateTimeArray[1][dateTime[1]]+'-'+dateTimeArray[2][dateTime[2]]+' '+dateTimeArray[3][dateTime[3]]+":"+dateTimeArray[4][dateTime[4]]+":"+dateTimeArray[5][dateTime[5]];
				console.log(timeStr)
				return timeStr
			},
		}
	}
</script>

3、dateTimePicker文件源码

/** * 自定义多列时间选择器 */
function withData(param) {
    
  return param < 10 ? '0' + param : '' + param;
}
 
function getLoopArray(start, end) {
    
  var start = start || 0;
  var end = end || 1;
  var array = [];
  for (var i = start; i <= end; i++) {
    
    array.push(withData(i));
  }
  return array;
}
 
function getMonthDay(year, month) {
    
  var flag = year % 400 == 0 || (year % 4 == 0 && year % 100 != 0), array = null;
 
  switch (month) {
    
    case '01':
    case '03':
    case '05':
    case '07':
    case '08':
    case '10':
    case '12':
      array = getLoopArray(1, 31)
      break;
    case '04':
    case '06':
    case '09':
    case '11':
      array = getLoopArray(1, 30)
      break;
    case '02':
      array = flag ? getLoopArray(1, 29) : getLoopArray(1, 28)
      break;
    default:
      array = '月份格式不正确，请重新输入！'
  }
  return array;
}
 
 
function getNewDateArry() {
    
  // 当前时间的处理
  var newDate = new Date();
  var year = withData(newDate.getFullYear()),
    mont = withData(newDate.getMonth() + 1),
    date = withData(newDate.getDate()),
    hour = withData(newDate.getHours()),
    minu = withData(newDate.getMinutes()),
    seco = withData(newDate.getSeconds());
 
  return [year, mont, date, hour, minu, seco];
}
 
function dateTimePicker(startYear, endYear, date) {
    
  // 返回默认显示的数组和联动数组的声明
  var dateTime = [], dateTimeArray = [[], [], [], [], [], []];
  var start = startYear || 2000;
  var end = endYear || 2100;
  // 默认开始显示数据
  var defaultDate = date ? [...date.split(' ')[0].split('-'), ...date.split(' ')[1].split(':')] : getNewDateArry();
  // 处理联动列表数据
  /*年月日 时分秒*/
  dateTimeArray[0] = getLoopArray(start, end);
  dateTimeArray[1] = getLoopArray(1, 12);
  dateTimeArray[2] = getMonthDay(defaultDate[0], defaultDate[1]);
  dateTimeArray[3] = getLoopArray(0, 23);
  dateTimeArray[4] = getLoopArray(0, 59);
  dateTimeArray[5] = getLoopArray(0, 59);
 
  dateTimeArray.forEach((current, index) => {
    
    dateTime.push(current.indexOf(defaultDate[index]));
  });
 
  return {
    
    dateTimeArray: dateTimeArray,
    dateTime: dateTime
  }
}
 
module.exports = {
    
  dateTimePicker: dateTimePicker,
  getMonthDay: getMonthDay
}