微信小程序日历弹窗选择器代码实例

应公司需求，写了一个弹窗日历选择器，感觉用着还不错，封装了一下，分享给大家，希望大家有什么意见可以指出来相互交流共同改进！

先上一个效果图：（当天日期为2018-4-18）

时间改为5月份的效果图：

直接上代码：

wxml:

<view class="weui-cells weui-cells_after-title" style='margin-top:100rpx;'>
 <view class="weui-cell weui-cell_access" hover-class="weui-cell_active" catchtap='showmodalbtn'>
  <view class="weui-cell__bd">选择时间</view>
  <view class="weui-cell__ft weui-cell__ft_in-access">{{choosedate}}</view>
 </view>
</view>
 
<view class="modal-mask" bindtap="hidemodal" catchtouchmove="preventtouchmove" hidden="{{showmodal}}"></view>
<view class="modal-dialog" hidden="{{showmodal}}">
 <view class='modalbox'>
  <view class='box'>
   <view class='calendarbox'>
    <view class='calendartitle'>
     当前月份:
     <text style='font-size:46rpx;'>{{thismonth}}</text> 月
    </view>
    <block wx:for="{{week}}" wx:key="item">
     <view class="week">{{week[index]}}</view>
    </block>
    <block wx:for="{{weeknum}}" wx:key="item">
     <view class="week" style="border-bottom:0;color:transparent">0</view>
    </block>
    <block wx:for="{{daylist}}" wx:key="item">
     <view class='week' style="border-bottom:0;background-color:{{dayindex>index?'#f1f1f1':(tapthis==index?'#1296db':'')}};color:{{tapthis==index?'white':''}}" catchtap="choosedate" data-index="{{index}}" data-value="{{item}}">{{item}}</view>
    </block>
   </view>
  </view>
 </view>
</view>

wxss:

.modalbox{
 width: 100%;
 font-size: 32rpx;
}
.box{
 margin: 0 auto;
 width: 630rpx;
}
.calendartitle{
 /* margin: 0 auto;
 width: 630rpx; */
 width: 100%;
 height: 80rpx;
 line-height: 80rpx;
 text-align: center;
 border-bottom: 1rpx solid #ddd;
}
.calendarbox{
 /* width: 630rpx; */
 width:100%;
 margin: 0 auto;
 border:1rpx solid #ddd;
}
.week{
 display: inline-block;
 width:90rpx;
 height: 80rpx;
 text-align: center;
 line-height: 80rpx;
 border-bottom: 1rpx solid #ddd;
}
.datebtn{
 width:100%;
 height: 80rpx;
 display: flex;
 justify-content: space-between;
 margin-top: 20rpx;
 
}
 .datebtn>button{
 width: 45%;
 height: 100%;
 display:flex;
 justify-content: center;
 align-items: center;
 margin: 0;
 font-size: 36rpx;
} 
/* 模态框 */ 
 
.modal-mask { 
 width: 100%; 
 height: 100%; 
 position: fixed; 
 top: 0; 
 left: 0; 
 background: #000; 
 opacity: 0.5; 
 overflow: hidden; 
 z-index: 9000; 
} 
 
.modal-dialog { 
 width: 85%; 
 padding: 100rpx 30rpx 30rpx 30rpx; 
 overflow: hidden; 
 position: fixed; 
 top: 20%; 
 left: 0; 
 right: 0; 
 margin: 0 auto; 
 z-index: 9999; 
 background: rgba(255, 255, 255, 1); 
 border-radius: 5rpx; 
} 

js:

page({
 
 /**
  * 页面的初始数据
  */
 data: {
  showmodal:true,
  weeklength:7,
  week:["日","一","二","三","四","五","六"],
  daylist:[],
  weeknum:0,
  tapthis:0,
  thismonth:0,
  thisyear:0,
  dayindex:0,
  choosedate:"",
 },
 getweek(year,month,day){
  var that = this;
  var d = new date();
  d.setfullyear(year);
  d.setmonth(month-1);
  d.setdate(1);
  var n = d.getday();
  var arr =[];
  var index=0;
  var dayn=1;
  for(var i = 0; i<day; i++){
   arr.push(dayn++);
  }
  var now = new date();
  var nowyear = now.getfullyear();
  var nowmonth = now.getmonth()+1;
  var nowday = now.getdate();
  var val = 1;
  if(year==nowyear){
   if(month==nowmonth){
     index=arr.indexof(nowday);
     console.log(index);
     val = nowday;
   }
  }
  that.setdata({
   weeknum:n,
   daylist:arr,
   dayindex:index,
   tapthis:index,
   thismonth:month,
   thisyear:year,
   choosedate:year+"-"+month+"-"+val,
  })
 },
 choosedate(e){
  var that = this;
   var n = e.currenttarget.dataset.index;
   var val = e.currenttarget.dataset.value;
   console.log(n);
   if(n>=that.data.dayindex){
    that.setdata({
     tapthis:n,
     choosedate:that.data.thisyear+"-"+that.data.thismonth+"-"+val,
     showmodal:true,
    })
   }
 },
 /** 
 * 弹出框蒙层截断touchmove事件 
 */
 preventtouchmove: function () {
 },
 /** 
  * 隐藏模态对话框 
  */
 hidemodal() {
  var that = this;
  that.setdata({
   showmodal: true,
  })
 }, 
 showmodalbtn(){
  var that = this;
  that.setdata({
   showmodal:false
  })
 },
 
 /**
  * 生命周期函数--监听页面加载
  */
 onload: function (e) {
  var that = this;
  that.getweek("2018","04","31"); //使用方法： 在此函数内传入年、月、日(此月的天数)即可。
 }
})

代码设计思路：

1、此代码是符合我们公司实际情况定制的，选择哪个月份，需要传递哪个月份的参数，比如我要2018-04的日历选择器，那么我需要在 getweek() 中传递年，月，日（此月的总天数）作为参数，代码会自动计算出当月的一号是星期几并且排版好！

如果不知道此月的天数 ，这里还提供如下代码方便各位码友计算出各个月份的天数

getdaynum(year,month){ //传入参数年份 和 要计算的月份， 可以为字符串，也可以为数字。
  var that = this;
  var d = new date();
  d.setfullyear(year);
  d.setmonth(month);
  d.setdate(0);
  console.log(d.getdate()); //d.getdate() 即为此月的总天数！
 },

2、具体思路就是：根据传递的参数计算出当月的第一天为星期几，然后从星期几开始排列，通过循环{{总天数}}次，让日期循环出来。然后再获取当前日期，判断日历弹窗与当前月份是否吻合，如果吻合，就要将在当前日期之前的日期都设置为不可点击状态。然后就是点击获取值，整个日历流程完毕。

以上所述是小编给大家介绍的微信小程序日历弹窗选择器详解整合，希望对大家有所帮助