微信小程序select下拉框实现源码

<view class='list-msg'>
<view class='list-msg1'>
<text>商品金额</text>
<text>￥99.00</text>
</view>
<!--下拉框 -->
<view class='list-msg2' bindtap='bindShowMsg'>
<text>{{tihuoWay}}</text>
<image style='height:20rpx;width:20rpx;' src='/images/down.png'></image>
</view>
<view class='list-msg1'>
<text>运费</text>
<text></text>免邮</view>
<view class='list-msg1'>
<text>实际付款</text>
<text style='color:red'>￥99.00</text>
</view>
<!-- 下拉需要显示的列表 -->
<view class="select_box" wx:if="{{select}}">
<view class="select_one" bindtap="mySelect" data-name="重庆分店">重庆分店</view>
<view class="select_one" bindtap="mySelect" data-name="东莞南城分店">东莞南城分店</view>
<view class="select_one" bindtap="mySelect" data-name="东莞总店">东莞总店</view>
</view>
</view>

Page({

  /**
* 页面的初始数据
*/
  data: {
    select: false,
    tihuoWay: '门店自提'
  },

  /**
* 生命周期函数--监听页面加载
*/
  onLoad: function(options) {

},
  bindShowMsg() {
    this.setData({
      select: !this.data.select
    })
  },
  mySelect(e) {
    var name = e.currentTarget.dataset.name this.setData({
      tihuoWay: name,
      select: false
    })
  },

  /**
* 用户点击右上角分享
*/
  onShareAppMessage: function() {

}
})

.list - msg {
  padding: 0 20rpx;
  background - color: #fff;
  position: relative;
}

.list - msg1 {
  height: 60rpx;
  display: flex;
  align - items: center;
  justify - content: space - between;
}

.list - msg.list - msg2 {
  height: 60rpx;
  display: flex;
  align - items: center;
  justify - content: space - between;
  border: 1px solid#ccc;
  padding: 0 10rpx;
}

.select_box {
  background - color: #eee;
  padding: 0 10rpx;
  width: 93 % ;
  position: absolute;
  top: 130rpx;
  z - index: 1;
  overflow: hidden;
  animation: myfirst 0.5s;
}

@keyframes myfirst {
  from {
    height: 0rpx;
  }

  to {
    height: 210rpx;
  }
}

.select_one {
  height: 60rpx;
  line - height: 60rpx;
  border - bottom: 1px solid#ccc;
}