前言：

在小程序中，往往查询历史或者需要时间查询的情景下，都需要用到picker组件，PC端的这种组件非常多，但是小程序中相对较少，不支持多选（除非自己封装），那么单选我们不得不考虑picker。

正文：

• 效果图：

picker

• API文档：

基础库 1.0.0 开始支持，低版本需做兼容处理。

从底部弹起的滚动选择器。

mode 的合法值

除了上述通用的属性，对于不同的mode，picker拥有不同的属性。

普通选择器：mode = selector

多列选择器：mode = multiSelector

时间选择器：mode = time

日期选择器：mode = date

fields 有效值：*

省市区选择器：mode = region 1.4.0

• 引入js文件：dateTimePicker.js

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 || 1978;
 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
}

• 正文代码：

1. wxml（html）：

   <view class="historyQuery" style="position: fixed;top: 40px;left: 0;width: 100%;">
   	<view class="chooseDate">
   		<view class="startDate">
   	        <picker mode="multiSelector" :value="startdateTime" @change="changestartDateTime" @columnchange="changeDateTimeColumn"
   							 :range="startdateTimeArray" class="pI">
   			    <view class="picker">{
        
        {historyForm.startTime}}</view>
   			</picker>
   		</view>
   		<view class="dateText">至</view>
   		<view class="endDate">
   			<picker mode="multiSelector" :value="enddateTime" @change="changeendDateTime" @columnchange="changeDateTimeColumn"
   							 :range="enddateTimeArray" class="pI">
   				<view class="picker">{
        
        {historyForm.endTime}}</view>
   			</picker>
   		</view>
   	    <view class="searchBtn" @click="getHistoryData">查询</view>
       </view>
   </view>

2. wxss(css)：

   .chooseDate {
   	display: flex;
   	flex-flow: row nowrap;
   	align-items: baseline;
   	box-sizing: border-box;
   	padding: 0 20px;
   	text-align: center;
   }
   
   .chooseDate .dateText {
   	display: inline-block;
   	font-size: 23rpx;
   	color: #262626;
   	vertical-align: top;
   	margin-top: 5rpx;
   	margin: 5rpx 15rpx 0 15rpx;
   }
   
   .chooseDate .startDate,
   .chooseDate .endDate {
   	padding: 10rpx;
   	display: inline-block;
   	line-height: 50rpx;
   	border: 2rpx solid #ccc;
   	border-radius: 20rpx;
   	font-size: 22rpx;
   }
   
   .pI {
   	text-align: center !important;
   	color: #ff8010, ;
   }
   
   .chooseDate .picker {
   	height: 100%;
   	left: 0rpx;
   	box-sizing: border-box;
   }
   
   .chooseDate image {
   	width: 20rpx;
   	height: 20rpx;
   }
   
   .chooseDate .searchBtn {
   	width: 100rpx;
   	height: 50rpx;
   	border-radius: 20rpx;
   	background: #00ba9a;
   	font-size: 24rpx;
   	color: #fff;
   	display: inline-block;
   	text-align: center;
   	line-height: 50rpx;
   	margin-left: 30rpx;
   	vertical-align: top;
   }

3. js：

<script>
//没有写的很规范，只是截取出来的，如果报错注意修改，
data() {
	return {
       //历史数据表单
	    historyForm: {
			historygwsn: "",
			historyPtype: null,
			historyPname: "",
			historyDevid: "",
		    historyTagname: "",
			historyTagId: [],
			startTime: "",
			endTime: ""
		}
    }
},
methods:{
    //格式化时间
	formatPickerDateTime(dateTimeArray, dateTime) {
				let format = dateTimeArray[0][dateTime[0]] + '-' + dateTimeArray[1][dateTime[1]] +
					'-' + dateTimeArray[2][dateTime[2]] + " " +
				dateTimeArray[3][dateTime[3]] + ':' + dateTimeArray[4][dateTime[4]] + ':' + dateTimeArray[5][dateTime[5]]
			return format
	},

    //获取当前时间
	getCurrentTime() {
				let nowTime = new Date(),
					year = nowTime.getFullYear(),
					month = nowTime.getMonth() + 1 >= 10 ? nowTime.getMonth() + 1 : '0' + (nowTime.getMonth() + 1),
					day = nowTime.getDate() >= 10 ? nowTime.getDate() : '0' + nowTime.getDate(),
					hours = nowTime.getHours() >= 10 ? nowTime.getHours() : '0' + nowTime.getHours(),
					minute = nowTime.getMinutes() >= 10 ? nowTime.getMinutes() : '0' + nowTime.getMinutes(),
					second = nowTime.getSeconds() >= 10 ? nowTime.getSeconds() : '0' + nowTime.getSeconds();
				let currentTime = year + '-' + month + '-' + day + " " + hours + ":" + minute + ":" + second;
				let obj = dateTimePicker.dateTimePicker(this.startYear, this.endYear, currentTime);
				this.startdateTime = obj.dateTime;
				this.enddateTime = obj.dateTime;
				this.startdateTimeArray = obj.dateTimeArray;
				this.enddateTimeArray = obj.dateTimeArray;
				this.alarmstartdateTime = obj.dateTime;
				this.alarmenddateTime = obj.dateTime;
				this.alarmstartdateTimeArray = obj.dateTimeArray;
				this.alarmenddateTimeArray = obj.dateTimeArray;
				this.historyForm.startTime = this.formatPickerDateTime(this.startdateTimeArray, this.startdateTime);
				this.historyForm.endTime = this.formatPickerDateTime(this.enddateTimeArray, this.enddateTime);
				this.alarmForm.startTime = this.formatPickerDateTime(this.alarmstartdateTimeArray, this.alarmstartdateTime);
				this.alarmForm.endTime = this.formatPickerDateTime(this.alarmenddateTimeArray, this.alarmenddateTime);
			},
//时间选择器
			changestartDateTime(e) {
				this.startdateTime = e.mp.detail.value;
				this.historyForm.startTime = this.formatPickerDateTime(this.startdateTimeArray, this.startdateTime);
			},

			changeDateTimeColumn(e) {
				var arr = this.startdateTime,
					dateArr = this.startdateTimeArray;
				arr[e.detail.column] = e.detail.value;
				dateArr[2] = dateTimePicker.getMonthDay(dateArr[0][arr[0]], dateArr[1][arr[1]]);
				this.startdateTimeArray = null;
				this.enddateTimeArray = null;
				this.alarmstartdateTimeArray = null;
				this.alarmenddateTimeArray = null;
				this.startdateTimeArray = dateArr;
				this.enddateTimeArray = dateArr;
				this.alarmstartdateTimeArray = dateArr;
				this.alarmenddateTimeArray = dateArr;
			},

			changeendDateTime(e) {
				this.enddateTime = e.mp.detail.value;
				this.historyForm.endTime = this.formatPickerDateTime(this.enddateTimeArray, this.enddateTime);
			},

//注意这些都是方法，不是粘贴来就不会报错，根据你的场景合理的调取方法，有问题欢迎来评论！
}

</script>