微信小程序实现单选选项卡切换效果

<view class="item" wx:for="{{data}}" wx:for-item="item" wx:for-index="idx" data-idx="{{idx}}" bindtap="chooseitem">
  <view class="choosebtn {{idx==currentidx&&choose==true?'choosedbtn':'choosenobtn'}}"></view>
  <text>{{idx==currentidx&&choose==true?text:texttwo}}</text>
</view>

.item {
 width: 100%;
 height: 120rpx;
 background: #f5f5f5;
 display: flex;
 flex-direction: row;
 align-items: center;
 margin-bottom: 20rpx;
}

.item .choosebtn {
 width: 60rpx;
 height: 60rpx;
 border-radius: 50%;
 margin-left: 40rpx;
}

.item .choosenobtn {
 background: #c0c0c0;
}

.item .choosedbtn {
 background: #87ceeb;
}

.item text {
 margin-left: 30rpx;
}

page({
 data: {
  // 让所有的选项都成为未选中状态
  choose: false,
  // 用来循环展示的数据
  data: [1, 2, 3],
  text: '选中了',
  texttwo: '没选中'
 },
 // 点击选项卡时的js
 chooseitem: function (e) {
  //记录上次点击的对象的序号
  var oldidx = this.data.currentidx;
  //记录当前点击的对象的序号
  var currentidx = e.currenttarget.dataset.idx;
  if (oldidx == currentidx) {
   var choose = this.data.choose;
   this.setdata({
    currentidx: currentidx,
    choose: !choose
   })
  } else {
   this.setdata({
    currentidx: currentidx,
    choose: true
   });
  }
 }
})