代码如下，web正常，小程序端scrolltoupper、scroll事件都不调用

<KScrollView
    class="box-chat"
    id="boxChat"
    :scroll-y="true"
    :scroll-anchoring="true"
    @scrolltoupper="scrollToUpper"
    @scroll="scroll"
    :scroll-into-view="scrollTo"
>
  <KView check-reduce class="box-loading" id="boxLoading">
    <span  class="loading" v-if="hasMore === 0">加载中...</span>
    <span class="not-more" v-if="hasMore === 2">没有更多消息了</span>
    <span class="not-more" v-if="hasMore === 3">暂无消息</span>
    <span class="load-more" v-if="hasMore === 1" @click="loadingHistory()">加载更多消息</span>
  </KView>
  <KView v-for="(v, i) in messageList" :key="i" :id="'msg-' + v.id">
    <chat-message  :msg="v" :online="isUserOnline"></chat-message>
  </KView>
</KScrollView>