打造万能微信小程序日期时间选择器

背景

       由于官方只提供了单独的日期选择和时间选择，在项目中遇到需要同时选择日期和时间的需求，所以自己写了一个可以动态配置格式的时间选择器。

效果图

首先我们新建自定义组件，不明白的可以看官方文档 https://developers.weixin.qq.com/miniprogram/dev/framework/custom-component/ 

新建自定义组件

界面编写

datetimepicker.wxml

<view class="view-body">
  <text class='item-key'>{{title}}<text style="color:red" wx:if="{{isRequired}}">*</text></text>
  <view class="item-value">
    <picker mode="multiSelector" bindchange="bindPickerChange" bindcolumnchange="bindPickerColumnChange" value="{{multiIndex}}" range="{{multiArray}}">
      <input disabled="{{true}}" value='{{value}}' name='{{name}}' />
      <image class="img-arrow" src='/images/date_icon.png' />
    </picker>
  </view>
</view>

js代码

// components/datatimepicker/datatimepicker.js

Component({
  behaviors: ['wx://form-field'],
  properties: {
    title: {
      type: String
    },
    name: {
      type: String
    },
    isRequired: {
      type: Boolean
    },
    format: {
      type: String
    }
  },
  data: {},
  lifetimes: {
    attached: function() {
      //当前时间 年月日 时分秒
      const date = new Date()
      const curYear = date.getFullYear()
      const curMonth = date.getMonth() + 1
      const curDay = date.getDate()
      const curHour = date.getHours()
      const curMinute = date.getMinutes()
      const curSecond = date.getSeconds()

      //初始化时间选择轴
      this.setData({
        chooseYear: curYear
      })
      this.initColumn(curMonth)

      //不足两位的前面好补0 因为后面要获取在时间轴上的索引 时间轴初始化的时候都是两位
      var showMonth = curMonth < 10 ? ('0' + curMonth) : curMonth
      var showDay = curDay < 10 ? ('0' + curDay) : curDay
      var showHour = curHour < 10 ? ('0' + curHour) : curHour
      var showMinute = curMinute < 10 ? ('0' + curMinute) : curMinute
      var showSecond = curSecond < 10 ? ('0' + curSecond) : curSecond

      //当前时间在picker列上面的索引 为了当打开时间选择轴时选中当前的时间
      var indexYear = this.data.years.indexOf(curYear + '')
      var indexMonth = this.data.months.indexOf(showMonth + '')
      var indexDay = this.data.days.indexOf(showDay + '')
      var indexHour = this.data.hours.indexOf(showHour + '')
      var indexMinute = this.data.minutes.indexOf(showMinute + '')
      var indexSecond = this.data.seconds.indexOf(showSecond + '')

      var multiIndex = []
      var multiArray = []
      var value = ''

      var format = this.properties.format;
      if (format == 'yyyy-MM-dd') {
        multiIndex = [indexYear, indexMonth, indexDay]
        value = `${curYear}-${showMonth}-${showDay}`
        multiArray = [this.data.years, this.data.months, this.data.days]
      }
      if (format == 'HH:mm:ss') {
        multiIndex = [indexHour, indexMinute, indexSecond]
        value = `${showHour}:${showMinute}:${showSecond}`
        multiArray = [this.data.hours, this.data.minutes, this.data.seconds]
      }
      if (format == 'yyyy-MM-dd HH:mm') {
        multiIndex = [indexYear, indexMonth, indexDay, indexHour, indexMinute]
        value = `${curYear}-${showMonth}-${showDay} ${showHour}:${showMinute}`
        multiArray = [this.data.years, this.data.months, this.data.days, this.data.hours, this.data.minutes]
      }
      if (format == 'yyyy-MM-dd HH:mm:ss') {
        multiIndex = [indexYear, indexMonth, indexDay, indexHour, indexMinute, indexSecond]
        value = `${curYear}-${showMonth}-${showDay} ${showHour}:${showMinute}:${showSecond}`
        multiArray = [this.data.years, this.data.months, this.data.days, this.data.hours, this.data.minutes, this.data.seconds]

      }
      this.setData({
        value,
        multiIndex,
        multiArray,
        curMonth,
        chooseYear: curYear,

      })
    }
  },
  /**
   * 组件的方法列表
   */
  methods: {
    //获取时间日期
    bindPickerChange: function(e) {
      this.setData({
        multiIndex: e.detail.value
      })
      const index = this.data.multiIndex
      var format = this.properties.format
      var showTime = ''

      if (format == 'yyyy-MM-dd') {
        const year = this.data.multiArray[0][index[0]]
        const month = this.data.multiArray[1][index[1]]
        const day = this.data.multiArray[2][index[2]]
        showTime = `${year}-${month}-${day}`
      }
      if (format == 'HH:mm:ss') {
        const hour = this.data.multiArray[0][index[0]]
        const minute = this.data.multiArray[1][index[1]]
        const second = this.data.multiArray[2][index[2]]
        showTime = `${hour}:${minute}:${second}`
      }
      if (format == 'yyyy-MM-dd HH:mm') {
        const year = this.data.multiArray[0][index[0]]
        const month = this.data.multiArray[1][index[1]]
        const day = this.data.multiArray[2][index[2]]
        const hour = this.data.multiArray[3][index[3]]
        const minute = this.data.multiArray[4][index[4]]
        showTime = `${year}-${month}-${day} ${hour}:${minute}`
      }
      if (format == 'yyyy-MM-dd HH:mm:ss') {
        const year = this.data.multiArray[0][index[0]]
        const month = this.data.multiArray[1][index[1]]
        const day = this.data.multiArray[2][index[2]]
        const hour = this.data.multiArray[3][index[3]]
        const minute = this.data.multiArray[4][index[4]]
        const second = this.data.multiArray[5][index[5]]
        showTime = `${year}-${month}-${day} ${hour}:${minute}:${second}`
      }
      this.setData({
        value: showTime
      })
      this.triggerEvent('dateTimePicker', showTime)
    },
    //初始化时间选择轴
    initColumn(curMonth) {
      const years = []
      const months = []
      let days = []
      const hours = []
      const minutes = []
      const seconds = []
      for (let i = 1990; i <= 2099; i++) {
        years.push(i + '')
      }
      for (let i = 1; i <= 12; i++) {
        if (i < 10) {
          i = "0" + i;
        }
        months.push(i + '')
      }

      if (curMonth == 1 || curMonth == 3 || curMonth == 5 || curMonth == 7 || curMonth == 8 || curMonth == 10 || curMonth == 12) {
        for (let i = 1; i <= 31; i++) {
          if (i < 10) {
            i = "0" + i;
          }
          days.push(i + '')
        }
      }
      if (curMonth == 4 || curMonth == 6 || curMonth == 9 || curMonth == 11) {
        for (let i = 1; i <= 30; i++) {
          if (i < 10) {
            i = "0" + i;
          }
          days.push(i + '')
        }
      }
      if (curMonth == 2) {
        this.setFebDays()
      }
      for (let i = 0; i <= 23; i++) {
        if (i < 10) {
          i = "0" + i;
        }
        hours.push(i + '')
      }
      for (let i = 0; i <= 59; i++) {
        if (i < 10) {
          i = "0" + i;
        }
        minutes.push(i + '')
      }
      for (let i = 0; i <= 59; i++) {
        if (i < 10) {
          i = "0" + i;
        }
        seconds.push(i + '')
      }
      this.setData({
        years,
        months,
        days,
        hours,
        minutes,
        seconds
      })
    },

    /**
     * 列改变时触发
     */
    bindPickerColumnChange: function(e) {
      //获取年份 用于计算改年的2月份为平年还是闰年
      if (e.detail.column == 0 && this.properties.format != 'HH:mm:ss') {
        var chooseYear = this.data.multiArray[e.detail.column][e.detail.value];
        this.setData({
          chooseYear
        })
        if (this.data.curMonth == '02' || this.data.chooseMonth == '02') {
          this.setFebDays()
        }
      }
      //当前第二为月份时需要初始化当月的天数
      if (e.detail.column == 1 && this.properties.format != 'HH:mm:ss') {
        let num = parseInt(this.data.multiArray[e.detail.column][e.detail.value]);
        let temp = [];
        if (num == 1 || num == 3 || num == 5 || num == 7 || num == 8 || num == 10 || num == 12) { //31天的月份
          for (let i = 1; i <= 31; i++) {
            if (i < 10) {
              i = "0" + i;
            }
            temp.push("" + i);
          }
          this.setData({
            ['multiArray[2]']: temp
          });
        } else if (num == 4 || num == 6 || num == 9 || num == 11) { //30天的月份
          for (let i = 1; i <= 30; i++) {
            if (i < 10) {
              i = "0" + i;
            }
            temp.push("" + i);
          }
          this.setData({
            ['multiArray[2]']: temp
          });
        } else if (num == 2) { //2月份天数
          this.setFebDays()
        }
      }
      var data = {
        multiArray: this.data.multiArray,
        multiIndex: this.data.multiIndex
      };
      data.multiIndex[e.detail.column] = e.detail.value;
      this.setData(data);
    },
    //计算二月份天数
    setFebDays() {
      let year = parseInt(this.data.chooseYear);
      let temp = [];
      if (year % (year % 100 ? 4 : 400) ? false : true) {
        for (let i = 1; i <= 29; i++) {
          if (i < 10) {
            i = "0" + i;
          }
          temp.push("" + i);
        }
        this.setData({
          ['multiArray[2]']: temp,
          chooseMonth: '02'

        });
      } else {
        for (let i = 1; i <= 28; i++) {
          if (i < 10) {
            i = "0" + i;
          }
          temp.push("" + i);
        }
        this.setData({
          ['multiArray[2]']: temp,
          chooseMonth: '02'
        });
      }
retrun temp;
    }
  },
})

 

使用方法：

首先在引用page的json中引用自定义组件：名称(DateTimePicker)为wxml中加载的标签名 可以随意名称 两边保持一致即可，路径确保正确。

{
  "usingComponents": {
    "DateTimePicker": "/components/datetimepicker/datetimepicker"
  }
}

wxml中：

<DateTimePicker title="选择时间" isRequired="true" bind:dateTimePicker="onDateTimePicker" name='time' format='yyyy-MM-dd HH:mm:ss' />

title：表单组件的名称

isRequired：是否必填项

dateTimePicker为选中确认回调

name为表单点击 form 表单中 form-type 为 submit 的 button 组件时，会将表单组件中的 value 值进行提交，需要在表单组件中加上 name 来作为 key

format：时间格式化参数 支持：'yyyy-MM-dd HH:mm:ss'，'yyyy-MM-dd HH:mm'，'yyyy-MM-dd'，'HH-mm-ss' 四种

最后附上完整代码地址：https://github.com/tex-github/miniprogram-components-datetimepicker