上滑加载 ：上滑是指鼠标上滑或者手指上滑，此时滚动条向下滚动，加载旧数据。
下拉刷新：下拉是指鼠标下拉或者手机下拉，此时滚动条向上滚动，加载新数据。
scroll-view方法遇到的问题：如果数据量很小的时候，没有滚动条的时候，scroll-view中的bindscrolltolower和bindscrolltoupper并不会触发。
wxml:
<scroll-view scroll-top="{{scrollTop}}" scroll-y="true" style="height:700rpx;" class="list" bindscrolltolower="bindDownLoad" bindscrolltoupper="topLoad" bindscroll="scroll"><view class="panel-comment-body" wx:for="{{commentList}}"><view class="panel-comment-item"><view class="left"><image class="img" src="/mmopen/vi_32/Q0j4TwGTfTKx8rpaTJayZL3eeRNkcFkp1NabPh9DiaDcEcaMb0UYpDhMwtB7PnGNsV6IqBGRblTCFOk3Ca4B3EA/132" mode="widthFix" /></view><view class="right"><view class="info"><span class="nickname">{{item.nickname}}</span><span class="time">{{item.time}}</span></view><view class="comment">{{ment}}</view></view></view> </view> </scroll-view>
js
data: {commentList:[{nickname:'漫漫',time:'-05-20 10:04:05',comment:"号公路收费是v纳滤膜村民绿绿的v吗"},{nickname:'彤彤',time:'-05-20 10:04:05',comment:"四道口附近老师的VS v没事慢慢捋"},{nickname:'欢欢',time:'-05-20 10:04:05',comment:"水水水水是考虑买驴马v领导v方面vv能否水水水水是考虑买驴马v领导v方面vv能否"},{nickname:'兮兮',time:'-05-20 10:04:05',comment:"是否受到广泛受到刚刚发给广告费"},],commentAddList:[{nickname:'兮兮',time:'-05-20 10:04:05',comment:"是否受到广泛受到刚刚发给广告费"},{nickname:'漫漫',time:'-05-20 10:04:05',comment:"是公司鬼地方高浮雕受到各国纷纷"},{nickname:'彤彤',time:'-05-20 10:04:05',comment:"岁的法国士大夫敢死队风格士大夫发给"},{nickname:'欢欢',time:'-05-20 10:04:05',comment:"事故发生的故事嘀咕嘀咕嘀咕发个广告"},{nickname:'兮兮',time:'-05-20 10:04:05',comment:"根深蒂固山豆根士大夫和防辐射防辐射规划"},]},bindDownLoad:function(){let data=mentAddListfor(let i=0;i<data.length;i++){mentList.push(data[i])}this.setData({commentList:mentList})},
