ml: <view class="identity" style="width:350rpx;">

        <label class="identity_title">民族：</label>

        <view class="wei-input">

          <view class="selected" bindtap='mySelect'>

          <text style="font-size:26rpx;">{{groups_name}}</text>

          <image src='/pages/images/xiala_1.png'></image> </view>

        </view>

         <!-- 下拉需要显示的列表 -->

        <view class="select_box" wx:if="{{select}}">

          <view wx:for="{{groups}}" wx:key="value" >

            <view class="select_one" bindtap="getNation" data-id="{{item.id}}" data-name="{{item.name}}">{{item.name}}</view>

          </view>

        </view>

      </view>

js:

通过radio单选，先拿到选择的id，可得到的是数组，求大佬们解答，帮我拿到id?(谢谢)