微信小程序实现折叠展开效果

<view class="page"><!-- 总数 --><view class="li" bindtap='changeToggle'><view class="left">总数</view><view class="right gray" >8</view></view><!--分类 --><view class="li" data-index="0" bindtap='changeToggle'><view class="left">类别1</view><view class="right">3 <text class="iconfont {{selectedFlag[0]?'icon-shangjiantou':'icon-xiala'}}"> </text>  </view> </view> <view hidden="{{!selectedFlag[0]}}"> <block wx:for="{{list01}}" wx:for-item="item" wx:for-index="index">  <view class="li bg-gray">  <view>展开1</view>  </view> </block> </view> <view class="li" data-index="1" bindtap='changeToggle'> <view class="left">类别2</view> <view class="right">0  <text class="iconfont {{selectedFlag[1]?'icon-shangjiantou':'icon-xiala'}}"> </text> </view> </view> <view hidden="{{!selectedFlag[1]}}"> <block wx:for="{{list02}}" wx:for-item="item" wx:for-index="index">  <view class="li bg-gray">  <view>展开2</view>  </view> </block> </view> <view class="li" data-index="2" bindtap='changeToggle'> <view class="left">类别3</view> <view class="right red">2  <text class="iconfont {{selectedFlag[2]?'icon-shangjiantou':'icon-xiala'}}"> </text> </view> </view> <view hidden="{{!selectedFlag[2]}}"> <block wx:for="{{list03}}" wx:for-item="item" wx:for-index="index">  <view class="li bg-gray">  <view>展开3</view>  </view> </block> </view> <view class="li" data-index="3" bindtap='changeToggle'> <view class="left">类别4</view> <view class="right red">3  <text class="iconfont {{selectedFlag[3]?'icon-shangjiantou':'icon-xiala'}}"> </text> </view> </view> <view hidden="{{!selectedFlag[3]}}"> <block wx:for="{{list04}}" wx:for-item="item" wx:for-index="index">  <view class="li bg-gray">  <view>展开4</view>  <view class="red">展开4右边</view>  </view> </block> </view>

/* 列表详情 */.li { background-color: #fff; display: flex; justify-content: space-between; font-size: 34rpx; width: 92%; padding: 0 4%; height: 100rpx; line-height: 100rpx; border-bottom: 1rpx solid #f1f1f1;}.bg-gray{ background-color: #ccc!important; border-bottom: 1rpx solid #fff!important;}.li .icon-xiala ,.icon-shangjiantou { color: #999; font-size: 28rpx;}.gray { color: #8e8e8e;}.red { color: #fe2e2e;}

Page({ data: { list01: [  { item_id: 1 }, { item_id: 11 }, { item_id: 11 }, ], list02: [ ], list03: [  { item_id: 11 }, { item_id: 11 } ], list04: [  { item_id: 11 }, { item_id: 11 }, { item_id: 11 } ], // 展开折叠 selectedFlag: [false, false, false, false], }, // 展开折叠选择  changeToggle:function(e){ var index = e.currentTarget.dataset.index; if (this.data.selectedFlag[index]){  this.data.selectedFlag[index] = false; }else{  this.data.selectedFlag[index] = true; } this.setData({  selectedFlag: this.data.selectedFlag }) },})