/* JS代碼部分 */ 3 const date = new Date()const years = []const months = []const days = []const hours = []const minutes = []var thisMon = date.getMonth();var thisDay = date.getDate();for (let i = 2017; i <= date.getFullYear() + 1; i++) { years.push(i)}for (let i = date.getMonth(); i <= 11; i++) { var k = i; if (0 <= i && i < 9) {  k = "0" + (i + 1); } else {  k = (i + 1); } months.push(k)}if (0 <= thisMon && thisMon < 9) { thisMon = "0" + (thisMon + 1);} else { thisMon = (thisMon + 1);}if (0 <= thisDay && thisDay < 10) { thisDay = "0" + thisDay;}var totalDay = mGetDate(date.getFullYear(), thisMon);for (let i = 1; i <= 31; i++) { var k = i; if (0 <= i && i < 10) {  k = "0" + i } days.push(k)}for (let i = 0; i <= 23; i++) { var k = i; if (0 <= i && i < 10) {  k = "0" + i } hours.push(k)}for (let i = 0; i <= 59; i++) { var k = i; if (0 <= i && i < 10) {  k = "0" + i } minutes.push(k)}function mGetDate(year, month) { var d = new Date(year, month, 0); return d.getDate();}Page({ data: {  years: years,  year: date.getFullYear(),  months: months,  month: thisMon,  days: days,  day: thisDay,  value: [1, thisMon - 1, thisDay - 1, 0, 0],  hours: hours,  hour: "00",  minutes: minutes,  minute: "00", }, bindChange: function (e) {  const val = e.detail.value  this.setData({   year: this.data.years[val[0]],   month: this.data.months[val[1]],   day: this.data.days[val[2]],   hour: this.data.hours[val[3]],   minute: this.data.minutes[val[4]],  })  var totalDay = mGetDate(this.data.year, this.data.month);  var changeDate = [];  for (let i = 1; i <= totalDay; i++) {   var k = i;   if (0 <= i && i < 10) {    k = "0" + i   }   changeDate.push(k)  }  this.setData({   days: changeDate  }) },})/* css代碼部分 */.time-title{ float:left; width:20%; text-align:center; color:#45BCE8;}.picker-text{ text-align:center;}/*mask*/.time_screens { width: 100%; position: fixed; bottom: 0; left: 0; z-index: 1000; opacity: 0.5; overflow: hidden;}/* html代碼部分 */ <view class="time_screens">  <view style="text-align:center;color:#45BCE8">{{year}}-{{month}}-{{day}}   <label style="float:left;margin-left:30px;">取消</label>   <label style="float:right;margin-right:30px;">確定</label>  </view>  <view style="border-top:1px solid #45BCE8;height:25px;font-size:14px;">  </view>  <picker-view indicator-style="height: 50px;" style="width: 100%; height: 300px;" value="{{value}}" bindchange="bindChange">   <picker-view-column class="picker-text">    <view wx:for="{{years}}" style="line-height: 50px">{{item}}年</view>   </picker-view-column>   <picker-view-column class="picker-text">    <view wx:for="{{months}}" style="line-height: 50px">{{item}}月</view>   </picker-view-column>   <picker-view-column class="picker-text">    <view wx:for="{{days}}" style="line-height: 50px">{{item}}日</view>   </picker-view-column>  </picker-view> </view>/* Json */{ "navigationBarTitleText": "XXXX"}