微信小程序 点击切换样式scroll-view实现代码实例

<view class="content">
 <view class="navbg">
  <view class="nav">
   <scroll-view class="scroll-view_H" scroll-x="true">
   <view class="scroll-view_H">
    <view><view class="{{flag==0? 'select':'normal'}}" id="0" bindtap="switchNav">推荐</view></view>
    <view><view class="{{flag==1? 'select':'normal'}}" id="1" bindtap="switchNav">热点</view></view>
    <view><view class="{{flag==2? 'select':'normal'}}" id="2" bindtap="switchNav">北京</view></view>
    <view><view class="{{flag==3? 'select':'normal'}}" id="3" bindtap="switchNav">社会</view></view>
    <view><view class="{{flag==4? 'select':'normal'}}" id="4" bindtap="switchNav">娱乐</view></view>
    <view><view class="{{flag==5? 'select':'normal'}}" id="5" bindtap="switchNav">问答</view></view>
    <view><view class="{{flag==6? 'select':'normal'}}" id="6" bindtap="switchNav">图片</view></view>
    <view><view class="{{flag==7? 'select':'normal'}}" id="7" bindtap="switchNav">科技</view></view>
    <view><view class="{{flag==8? 'select':'normal'}}" id="8" bindtap="switchNav">汽车</view></view>
    <view><view class="{{flag==9? 'select':'normal'}}" id="9" bindtap="switchNav">体育</view></view>
    </view>
   </scroll-view>
  </view>
  <view class="add">+</view>
 </view>
</view>

.navbg{
 background-color: #F6F5F3;
 height: 36px;
 color: #000000;
 display: flex;
 flex-direction: row;
 align-items: center;
}
.nav{
 width: 85%;
 height: 36px;
}
.add{
 width: 15%;
 height: 50px;
 line-height: 50px;
 text-align: right;
 margin-right: 10px;
 font-size: 50px;
}
.scroll-view_H{
 height: 40px;
 display: flex;
 flex-direction: row;
 margin-left: 5px;
}
.normal{
 width: 40px;
 height: 40px;
 line-height: 40px;
 padding-left: 5px;
 padding-right: 5px;
 font-size: 14px;
}
.select{
 width: 40px;
 height: 40px;
 line-height: 40px;
 padding-left: 5px;
 padding-right: 5px;
 font-size: 14px;
 font-weight: bold;
 color: skyblue;
}

data: {
  flag: 0,
 },
 switchNav: function(e){
  console.log(e.currentTarget.id);
  this.setData({
   flag: e.currentTarget.id
  })
 },