<view class="timePick">
  <picker mode="date" fields="month" value="{{timestamp}}" start="1999-01-01" end="2999-12-12" bindchange="datePickerBindchange">
   {{dateValue}}
  </picker>
 </view>

data: {
  searchDate:"",
  timestamp:""
 },
onLoad: function(options) {
  //日历默认值设置
  this.timestamp=new Date().getTime()
 },
datePickerBindchange:function(e){
  let date = e.detail.value+'-01 00:00:00.0';
  date = date.substring(0,19);
  // date = date.replace(/-/g,'/');
  let timestamp = new Date(date).getTime(); //插件再次打开时日期
  let picktime=e.detail.value
  let timeString=picktime.replace(/-/g,'年')+'月';
  // this.setData({
  //  dateValue:e.detail.value
  // })
  this.setData({
   searchDate:date,
   // searchDate:picktime,
   dateValue:timeString,  //1019年12月
   timestamp:picktime,
  })
 }