“锚点”功能在实际应用设计的好，可以提高用户体验。今天碰到一个类似下面功能：

由于页面数据比较多，除了做些上拉加载，下拉刷新等优化。还可以进行进行分类，如上图。功能要求:点击导航的菜单，相应页面的分类内容滑动到页面顶部。由于微信小程序页面无dom操作，改功能改如何操作呢？

一开始想到 wx.pageScrollTo(Object object) 这个API，由于每个点击每个导航利用wx.pageScrollTo滚动到相应分类的scrollTop不能确定，所以放弃了。

后发现 scroll-view 组件 的属性 scroll-into-view 可以利用一下：

<scroll-view scroll-y
scroll-into-view="{{toView}}"
bindscroll="scrollTopFun"

scroll-top="{{scrollTop.scroll_top}}"
scroll-with-animation="true"
>
<!-- 内容 -->
<view class='bg-white m-t10'>
 <view class='flex'>
 <view class='flex-1 f16 p-v text-center {{currentId === index? "active":""}}'
 data- bindtap='navHandleClick'
  wx:for="{{navietm}}" wx:key="{{index}}">{{item}}</view>
 </view>
 
 <view class='has-padding-sm'>
 <!-- 实时停电信息 -->
 <view>
  <view class='m-t10' wx:for="{{navlist}}" wx:key="{{index}}">
 
  <view class='itembox' id='{{item.id}}'>
   <view class='titlebox flex'>
   <view class='flex-1 text-ellipsis'>{{item.name}}</view>
   <view class='f12'>
    <text class='icon icon-like-o inline-middle'></text>
    <text class='inline-middle m-l5'>加入关注</text>
   </view>
   </view>
 
   <view class='itemconbox'>
   <view class='flex c9'>
    <view class='line m-r5 flex-1 self-middle'></view>
    ·<text class='p-w-sm'>昨天</text>·
    <view class='line m-l5 flex-1 self-middle'></view>
   </view>
 
   <view class='bg-white p-w-sm radius-sm m-t5' bindtap="togglePopup">
    <view class='border-line-b flex text-bold p-t5 p-b5'>
    <view class='flex-1'>
     <image src='../../images/date.png' class='ico-date inline-middle'></image>
     <text class='inline-middle m-l10'>2018-09-12 22:15:00</text>
    </view>
    <view>电网故障停限电</view>
    </view>
    <view class='p-w-sm p-v-sm'>
    <view>
     <text class='text-bold m-r10 c-11A99A'>送电时间:</text>
     <text class='f12 c6'>2018-09-13 16:15:00</text>
     <text class='label bg-A5A5A5'>预计</text>
    </view>
    <view>
     <text class='text-bold m-r10 c-11A99A'>停电范围:</text>
     <text class='f12 c6'>[开福区] 湘江世纪城、湘江世纪城、湘江世纪城、湘江世纪城、湘江世纪城、湘江世纪城、</text>
    </view>
    <view>
     <text class='text-bold m-r10 c-11A99A'>停电区域:</text>
     <text class='f12 c6'>湖南省长沙市开福区</text>
    </view>
    </view>
   </view>
   </view>
 
   <view class='itemconbox'>
   <view class='flex c9'>
    <view class='line m-r5 flex-1 self-middle'></view>
    ·<text class='p-w-sm'>昨天</text>·
    <view class='line m-l5 flex-1 self-middle'></view>
   </view>
 
   <view class='bg-white p-w-sm radius-sm m-t5' bindtap="togglePopup">
    <view class='border-line-b flex text-bold p-t5 p-b5'>
    <view class='flex-1'>
     <image src='../../images/date.png' class='ico-date inline-middle'></image>
     <text class='inline-middle m-l10'>2018-09-12 22:15:00</text>
    </view>
    <view>电网故障停限电</view>
    </view>
    <view class='p-w-sm p-v-sm'>
    <view>
     <text class='text-bold m-r10 c-11A99A'>送电时间:</text>
     <text class='f12 c6'>2018-09-13 16:15:00</text>
     <text class='label bg-A5A5A5'>预计</text>
    </view>
    <view>
     <text class='text-bold m-r10 c-11A99A'>停电范围:</text>
     <text class='f12 c6'>[开福区] 湘江世纪城、湘江世纪城、湘江世纪城、湘江世纪城、湘江世纪城、湘江世纪城、</text>
    </view>
    <view>
     <text class='text-bold m-r10 c-11A99A'>停电区域:</text>
     <text class='f12 c6'>湖南省长沙市开福区</text>
    </view>
    </view>
   </view>
   </view>
 
  </view>
 
  </view>
  <view class='text-center p-t10 f12 c9'>
  没有更多信息了
  </view>
 </view>
 
 </view>
 
</view>
</scroll-view>
 
<!-- 导航 -->
<view class='nav-fixed' wx:if="{{scrollTop.goTop_show}}"> <!-- 滚动到离顶部一定距离在显示导航按钮 -->
 <view class='navitembtn shadow {{isnavfixed ? "":"navitembtned"}}' catchtap='navfixedHandleClick'>导航</view>
 <view class='navconbox' hidden='{{isnavfixed}}'>
 <view class='floor gotop' catchtap='gotop'>返回顶部</view>
 <view class='floor' bindtap='clickScroll' data-
  wx:for="{{navlist}}" wx:key="{{index}}">
  {{item.name}}
  </view>
 </view>
</view>