小程序-点击按钮回到顶部1

以下代码的缺点：点击顶部按钮是直接回到顶部，而不是均匀的滑动至顶部

<scroll-view class="bigWrap" scroll-y="true" scroll-top="{{scrollTop}}" bindscroll="scroll" style="position: absolute; left: 0; top:0; bottom: 0; right: 0;">

<view>

<view class='li'>我是第一段</view>

</view>

</view>

</scroll-view>

data: {

scrollTop: 0

goTop: function (e) {

this.setData({

scrollTop: 0

})

scroll: function (e, res) {

// 容器滚动时将此时的滚动距离赋值给 this.data.scrollTop

if (e.detail.scrollTop > 500) {

this.setData({

floorstatus: true

});

} else {

this.setData({

floorstatus: false

});

}

.bigWrap{

background:#eee;

}

.com-widget-goTop {

position: fixed;

bottom: 125px;

right: 5px;

background: rgba(0,0,0,0.48);

border-radius: 50%;

overflow: hidden;

z-index: 500;

}

.com-widget-goTop .icon-gotop{

">rgba(0,0,0,0.8);

display: inline-block;

50px;

height: 50px;

line-height: 50px;

font-size: 12px;

color: #ffffff;

text-align: center;

border-radius: 50%;

}

.li{

height: 200rpx;

line-height: 200rpx;

background: #ff0000;

border-bottom: 1px solid #ffffff;

}