日期选择

 <picker class="date=='选择生日'?'placeName':'placeText'" mode="date" value="{{date}}" start="2015-09-01" end="{{dateEnd}}" bindchange="bindDateChange">
          <view class="picker">
              {{date}}
          </view>
        </picker>

js

data数据有
 date: '选择生日',
dateEnd:'2021-07-09'

  bindDateChange: function(e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      date: e.detail.value
    })
    this.saveInfor(1)
  },

小程序省市三级联动

  <picker class="picker-box" mode="region" bindchange="bindRegionChange" value="{{detailed}}" custom-item="{{customItem}}"
    name="detailed" >
              <view class="picker {{clas}}" >{{detailed}}</view>
</picker>

js

data有
 customItem: [],
 detailed: '请选择',

 //省市联动
 bindRegionChange: function (e) {
  var that = this
  //为了让选择框有个默认值，    
  that.setData({
    clas: ''
  })　　　//下拉框所选择的值
  console.log('picker发送选择改变，携带值为', e.detail.value)

  this.setData({
    //拼的字符串传后台
    detailed: e.detail.value[0] + " " + e.detail.value[1] + " " + e.detail.value[2],
    //下拉框选中的值
    region: e.detail.value
  })
  this.setData({
    "AddSite.area": e.detail.value[0] + " " + e.detail.value[1] + " " + e.detail.value[2],
    province:e.detail.value[0],
    city:e.detail.value[1],
    district:e.detail.value[2],
  })
  this.saveInfor(2)
  console.log(this.data.AddSite)
},