微信小程式中使用picker元件，但基本只有幾種格式，這裡分享一下封裝好的日期元件。

選擇後格式類似於：2018-09-19 17:30:55

wxml

<picker class='alarm_picker' mode="multiSelector" value="{{dateTime}}" bindchange="changeDateTime" bindcolumnchange="changeDateTimeColumn" range="{{dateTimeArray}}">
    <view class="picker">
      {{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>
 

js

//注意外部JS的路徑
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
    },
//editTime(){
    let editTime = `${that.data.dateTimeArray[0][that.data.dateTime[0]]}-${that.data.dateTimeArray[1][that.data.dateTime[1]]}-${that.data.dateTimeArray[2][that.data.dateTime[2]]} ${that.data.dateTimeArray[3][that.data.dateTime[3]]}:${that.data.dateTimeArray[4][that.data.dateTime[4]]}:${that.data.dateTimeArray[5][that.data.dateTime[5]]}`
    console.log(editTime)//時間拼接 （格式：2018-09-19 17:30:55）
}

//選擇時間方法
  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
    });
  }

})
 

在utils寫一個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 = '月份格式不正確，請重新輸入！'
  }
  return array;
}
function getNewDateArry() {
  // 當前時間的處理
  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) {
  // 返回預設顯示的陣列和聯動陣列的宣告
  var dateTime = [], dateTimeArray = [[], [], [], [], [], []];
  var start = startYear || 1978;
  var end = endYear || 2100;
  // 預設開始顯示資料
  var defaultDate = date ? [...date.split(' ')[0].split('-'), ...date.split(' ')[1].split(':')] : getNewDateArry();
  // 處理聯動列表資料
  /*年月日 時分秒*/
  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
}
 

大功告成~