js实现日期选择器的代码

/* JS代码部分 */
 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代码部分 */
.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代码部分 */
 <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;">确定</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"
}