针对小程序for循环绑定数据，实现toggle切换效果（交流QQ群：604788754）

<block wx:for="{{datanum}}" wx:for-index="idx" wx:for-item='item'>
  <view class="classname" >
    <view class="boxs">{{item.datas}}</view>
    <view wx:if="{{item.toggle==true}}" class="boxs">{{idx}}</view>
  </view>
</block>

.classname{
  background-color: red;
   200px;
  margin-top: 50px;
}
.boxs{
   100px;
  height: 50px;
  background-color: #188eee;
  line-height: 50px;
  text-align: center;
  color: #fff;
  margin-bottom: 10px;
}

Page({
  data:{
    datanum:[
      { datas:11 },
      { datas: 22 },
      { datas: 333 }
    ]
  },
  onLoad:function(){
    var datanum=this.data.datanum;
    for (var i = 0; i < datanum.length; i++) {
       datanum[i]['toggle'] = false;  //添加toggle 属性  
     };
     this.setData({
       datanum: datanum
     });
  },
  curchange:function(event){
    var id = event.currentTarget.id;
    var toggle = this.data.datanum[id]['toggle'];
    if(toggle==false){
      this.data.datanum[id]['toggle'] = true;
    }else{
      this.data.datanum[id]['toggle'] = false;
    };
    this.setData({
      datanum: this.data.datanum
    });
  }
});