微信小程序日期时间选择器如何使用

效果图

实现原理

利用微信小程序的picker组件的多列选择器实现！

WXML

<view class="tui-picker-content">   <view class="tui-picker-name">时间选择器（选择时分）</view>   <picker mode="time" value="{{time}}" start="09:00" end="17:30" bindchange="changeTime">   <view class="tui-picker-detail">    午饭时间: {{time}}    </view>   </picker>  </view>    <view class="tui-picker-content">   <view class="tui-picker-name">日期选择器（选择年月日）</view>   <picker mode="date" value="{{date}}" start="2017-10-01" end="2017-10-08" bindchange="changeDate">   <view class="tui-picker-detail">    国庆出游: {{date}}   </view>   </picker>  </view>    <view class="tui-picker-content">   <view class="tui-picker-name">日期时间选择器（精确到秒）</view>   <picker mode="multiSelector" value="{{dateTime}}" bindchange="changeDateTime" bindcolumnchange="changeDateTimeColumn" range="{{dateTimeArray}}">   <view class="tui-picker-detail">    选择日期时间: {{dateTimeArray[0][dateTime[0]]}}-{{dateTimeArray[1][dateTime[1]]}}-{{dateTimeArray[2][dateTime[2]]}} {{dateTimeArray[3][dateTime[3]]}}:{{dateTimeArray[4][dateTime[4]]}}:{{dateTimeArray[5][dateTime[5]]}}   </view>   </picker>  </view>  <view class="tui-picker-content">   <view class="tui-picker-name">日期时间选择器（精确到分）</view>   <picker mode="multiSelector" value="{{dateTime1}}" bindchange="changeDateTime1" bindcolumnchange="changeDateTimeColumn1" range="{{dateTimeArray1}}">   <view class="tui-picker-detail">    选择日期时间: {{dateTimeArray1[0][dateTime1[0]]}}-{{dateTimeArray1[1][dateTime1[1]]}}-{{dateTimeArray1[2][dateTime1[2]]}} {{dateTimeArray1[3][dateTime1[3]]}}:{{dateTimeArray1[4][dateTime1[4]]}}   </view>   </picker>  </view>

WXSS

@import "../picker/picker.wxss";

JS

var dateTimePicker = require('../../utils/dateTimePicker.js');    Page({   data: {   date: '2018-10-01',   time: '12:00',   dateTimeArray: null,   dateTime: null,   dateTimeArray1: null,   dateTime1: null,   startYear: 2000,   endYear: 2050   },   onLoad(){   // 获取完整的年月日 时分秒，以及默认显示的数组   var obj = dateTimePicker.dateTimePicker(this.data.startYear, this.data.endYear);   var obj1 = dateTimePicker.dateTimePicker(this.data.startYear, this.data.endYear);   // 精确到分的处理，将数组的秒去掉   var lastArray = obj1.dateTimeArray.pop();   var lastTime = obj1.dateTime.pop();     this.setData({    dateTime: obj.dateTime,    dateTimeArray: obj.dateTimeArray,    dateTimeArray1: obj1.dateTimeArray,    dateTime1: obj1.dateTime   });   },   changeDate(e){   this.setData({ date:e.detail.value});   },   changeTime(e){   this.setData({ time: e.detail.value });   },   changeDateTime(e){   this.setData({ dateTime: e.detail.value });   },   changeDateTime1(e) {   this.setData({ dateTime1: e.detail.value });   },   changeDateTimeColumn(e){   var arr = this.data.dateTime, dateArr = this.data.dateTimeArray;     arr[e.detail.column] = e.detail.value;   dateArr[2] = dateTimePicker.getMonthDay(dateArr[0][arr[0]], dateArr[1][arr[1]]);     this.setData({    dateTimeArray: dateArr,    dateTime: arr   });   },   changeDateTimeColumn1(e) {   var arr = this.data.dateTime1, dateArr = this.data.dateTimeArray1;     arr[e.detail.column] = e.detail.value;   dateArr[2] = dateTimePicker.getMonthDay(dateArr[0][arr[0]], dateArr[1][arr[1]]);     this.setData({     dateTimeArray1: dateArr,    dateTime1: arr   });   }  })

外部JS，dateTimePicker.js的引入

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  }

总结

• 将初始化列表以及初始化默认显示的数组放到dateTimePicker.js，防止页面逻辑太乱，而且可以多处使用；

• 判断是否为闰年，在三木表达式中，必须将能别400整除放在前边，因为或运算只要一个条件满足，就会返回true，不会执行后续表达式；

• switch case的合并方法需要注意格式；

• 如果只需要联动列表更新，二结果展示栏不更新，则在changeDateTimeColumn函数中只更新dateTimeArray的值。

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