微信小程序----实现YDUI的ScrollNav组件（滚动导航）

<!--导航滚动  -->
<scroll-view class="tui-city-scroll" scroll-x="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
  <text bindtap="getStatus" id="NAV{{index}}" class="tui-nav-li {{index === status ? 'tui-nav-active' : ''}}" data-index="{{index}}" wx:for="{{navList}}">{{item}}</text>
</scroll-view>
<!--列表滚动区  -->
<view class="tui-fixed-y">
  <scroll-view class="tui-city-scroll-y" scroll-y="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
    <view wx:for="{{navList}}">
      <view id="NAV{{index}}" class="tui-list-head">{{item}}</view>
      <view class="tui-list-li">{{item}} 列表 {{index}}</view>
    </view>
  </scroll-view>
</view>

.tui-fixed-x{
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
}
.tui-city-scroll{
  height: 80rpx;
  line-height: 80rpx;
  width: 100%;
  white-space: nowrap;
}
.tui-nav-li{
  font-size: 30rpx;
  padding: 0 8rpx;
}
.tui-nav-li:first-child{padding-left: 16rpx;}
.tui-nav-li:last-child{padding-right: 16rpx;}
.tui-nav-active{color: red;}

.tui-fixed-y{
  width: 100%;
  height: calc(100% - 80rpx);
  position: fixed;
  bottom: 0;
  left: 0;
}
.tui-city-scroll-y{
  padding: 0 20rpx;
  height: 100%;
  box-sizing: border-box;
}
.tui-list-head{
  height: 50px;
  line-height: 50px;
  text-align: center;
  font-size: 30rpx;
  color: blue;
}
.tui-list-li{
  height: 400px;
  padding: 10rpx;
  color: #fff;
  font-size: 50rpx;
  background-color: lightgreen;
}

Page({
  data: {
    navList: ['今日特惠', '烟灶推荐', '净水饮水推荐', '洗碗机推荐', '电热推荐', '燃热推荐', '消毒柜推荐', '嵌入式推荐', '商用电器','活动说明'],
    status: 0
  },
  getStatus(e){
    this.setData({ status: e.currentTarget.dataset.index})
  }
})