小程序下拉列表

<picker bindchange="bindPickerChange2" data-id="{{objectArray[objectIndex].id}}" value="{{objectIndex}}" range="{{objectArray}}" range-key="name">
    <view class="picker">
      <view class="pick2" style="display:flex;flex:1;">
        <view style="flex:1;text-align:left;padding-left:20rpx;">{{objectArray[objectIndex].name}}</view>
        <view style="flex:1;text-align:right;padding-right:20rpx;">
          <image src="image/bottom.png" style="width:20rpx;height:20rpx;"></image>
        </view>
      </view>
    </view>


  </picker>

  bindPickerChange2: function (e) {
    console.log(e);
    console.log(e.currentTarget.dataset.id);

    // console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      objectIndex: e.detail.value
    })
  },

.pick2{
  flex:1;
  text-align: center;
  height:90rpx;
  font-size:25rpx;
  line-height:90rpx;
  background:rgb(242,242,242);
  margin-left:20rpx;
  margin-right:20rpx;
  border-radius:10rpx;
}