回答

利用微信小程序的picker组件，其中：

1，普通选择器：mode = selector实现一级选择实例；

3， 多列选择器：mode = multiSelector实现二级和三级联动。

4， 多列选择器：mode = date实现日期选择。

5， 多列选择器：mode = time实现时间选择。

具体代码如下

<view class="tui-picker-content">

  <view class="tui-picker-name">日期选择</view>

                             <picker mode="date" placeholder-class="weui-input__placeholder" value="{{date}}"

                                start="2015-09-01" end="2017-09-01" bindchange="bindDateChange">

                                <view class="weui-input">{{date}}</view>

                            </picker>

</view>
<view class="tui-picker-content">

  <view class="tui-picker-name">时间选择</view>

     <picker mode="time" placeholder-class="weui-input__placeholder" value="{{time}}"

                                start="09:01" end="21:01" bindchange="bindTimeChange">

                                <view class="weui-input">{{time}}</view>

                            </picker>

</view>

<view class="tui-picker-content">
  <view class="tui-picker-name">一级选择实例</view>
  <picker bindchange="changeCountry"  value="{{countryIndex}}" range="{{countryList}}">
    <view class="tui-picker-detail">{{countryList[countryIndex]}}</view>
  </picker>
</view>

<view class="tui-picker-content">
  <view class="tui-picker-name">省市区三级联动选择</view>
  <picker bindchange="changeRegin" mode = "region" value="{{region}}">
    <view class="tui-picker-detail">{{region[0]}} - {{region[1]}} - {{region[2]}}</view>
  </picker>
</view>

<view class="tui-picker-content">
  <view class="tui-picker-name">自定义二级联动选择</view>
  <picker bindchange="changeMultiPicker" mode = "multiSelector" value="{{multiIndex}}" range="{{multiArray}}">
    <view class="tui-picker-detail">
    {{multiArray[0][multiIndex[0]]}} * {{multiArray[1][multiIndex[1]]}} = {{multiArray[0][multiIndex[0]] * multiArray[1][multiIndex[1]]}}
    </view>
  </picker>
</view>

<view class="tui-picker-content">
  <view class="tui-picker-name">自定义三级联动选择</view>
  <picker bindchange="changeMultiPicker3" mode = "multiSelector" value="{{multiIndex3}}" range="{{multiArray3}}">
    <view class="tui-picker-detail">
    {{multiArray3[0][multiIndex3[0]]}} * {{multiArray3[1][multiIndex3[1]]}} * {{multiArray3[2][multiIndex3[2]]}} = {{multiArray3[0][multiIndex3[0]] * multiArray3[1][multiIndex3[1]] * multiArray3[2][multiIndex3[2]]}}
    </view>
  </picker>
</view>

wxss代码

page{background-color: #efeff4;}
.tui-picker-content{
  padding: 30rpx;
  text-align: center;
}
.tui-picker-name{
  height: 80rpx;
  line-height: 80rpx;
}
.tui-picker-detail{
  height: 80rpx;
  line-height: 80rpx;
  background-color: #fff;
  font-size: 35rpx;
  padding: 0 10px;
  overflow: hidden;
}

Page({
  data: {
    // 普通选择器列表设置,及初始化
    countryList: ['中国','美国','英国','日本','韩国','巴西','德国'],
    countryIndex: 6,
    // 省市区三级联动初始化
    region: ["四川省", "广元市", "苍溪县"],
    // 多列选择器(二级联动)列表设置,及初始化
    multiArray: [[1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 2, 3, 4, 5, 6, 7, 8, 9]],
    multiIndex: [3,5],
    // 多列选择器(三级联动)列表设置,及初始化
    multiArray3: [[1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 2, 3, 4, 5, 6, 7, 8, 9]],
    multiIndex3: [3, 5, 4],
    date:"",
    time:""
  },
  bindDateChange: function(e) {

    this.setData({

        date: e.detail.value

    })

},

  bindTimeChange: function(e) {

    this.setData({

        time: e.detail.value

    })

},
  // 选择国家函数
  changeCountry(e){
    this.setData({ countryIndex: e.detail.value});
  },
  // 选择省市区函数
  changeRegin(e){
    this.setData({ region: e.detail.value });
  },
  // 选择二级联动
  changeMultiPicker(e) {
    this.setData({multiIndex: e.detail.value})
  },
  // 选择三级联动
  changeMultiPicker3(e) {
    this.setData({ multiIndex3: e.detail.value })
  }
})