vue-scroller

Question

我使用了vue-scroller，向上划不动，如何解决

<scroller 
                delegate-id="myScroller"
                  :on-refresh="onRefresh"
                  :on-infinite="onInfinite"
                  ref="my_scroller">
                  <div class="t-list" v-for="item in teacherListInfoArr">
                    <dl>
                        <dt class="fl">
                            <img @click="lookTeacherDetail(item.teacher_id)" v-bind:src=item.teacher_img alt="teacher-avatar">
                            <!-- <span class="online">在线</span> -->
                        </dt>
                        <dd class="fr re">
                            <div class="m1 re">
                                <span class="ab m1-name">{{item.teacher_cname}}</span>
                                <span class="ab m1-sex" v-bind:class="[item.teacher_sex=='F'?'sex-man':'sex-woman']">{{item.teacher_sex=='F'?'男':'女'}}</span>
                                <img class="ab m1-nation" src="../../../assets/pic/regen/u28.png" alt="">
                            </div>
                            <div class="m2 re">
                                <div class="fl m2-grade">
                                    <img v-for="item2 in item.teacher_score" src="../../../assets/pic/regen/u532.png" alt="">
                                </div>
                                <div class="fl m2-char">
                                    <span class="m2-subchar1">{{item.labelList[0].label_name}}</span>
                                    <span class="m2-subchar2" v-if="item.labelList[1]">{{item.labelList[1].label_name}}</span>
                                    <span class="m2-subchar3" v-if="item.labelList[2]">{{item.labelList[2].label_name}}</span>
                                </div>
                            </div>
                            <div class="m3">
                                {{item.teacher_info}}
                            </div>
                            <div class="m4 re">
                                <span class="m4-price"><i>{{item.teacher_price}}</i>$/分钟</span>
                                <span class="m4-order">立即预约</span>
                            </div>
                        </dd>
                    </dl>
                </div>
            </scroller>

onRefresh(done) {
            setTimeout(() => {
           
              done()
            }, 1500)
        },
        onInfinite(done) {
            setTimeout(() => {
    
              done()
            }, 1500)
        }

求教，怎么解决啊