微信小程序 隐藏或显示列表中的一行数据

wxml

<view class='text'>
  <text>方法一</text>
</view>
<view wx:for="{{list}}" wx:key="content" wx:for-index="key">
  <view class='title' data-index='{{key}}' bindtap='hiddenBtn'>
    <label>aaa {{item.id+1}}</label>
  </view>
  <view hidden='{{item.hidden}}'>
    <view class='line'></view>
    <view class='content'>
      <label>bbb</label>
    </view>
  </view>
  <view class='line_bottom'></view>
</view>
<view class='text'>
  <text>方法二</text>
</view>
<view wx:for="{{listCon}}" wx:key="content" wx:for-index="key">
  <view class='title' data-index='{{key}}' bindtap='hiddenBtnCon'>
    <label>aaa {{item.id+1}}</label>
  </view>
  <view class='{{item.hidden == false? "hide":"show"}}'>
   xxxx
  </view>
  <view class='{{item.hidden == true? "hide":"show"}}'>
    <view class='line'></view>
    <view class='content'>
      <label>bbb</label>
    </view>
  </view>
  <view class='line_bottom'></view>
</view><view class='text'>
  <text>方法一&l