6行代码实现微信小程序页面返回顶部效果
时间：2020-12-15 01:23:18 | 栏目：JavaScript代码 | 点击：次
本文实例为大家分享了微信小程序页面返回顶部的具体代码，供大家参考，具体内容如下
效果预览：
js部分：
Page({
data: {
topNum: 0
},
returnTop: function () {
this.setData({
topNum: this.data.topNum = 0
});
}
})
wxml部分：
<scroll-view scroll-y scroll-with-animation='true' scroll-top='{{ topNum }}'>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
<view>1</view>
</scroll-view>
<view class='top' catchtap='returnTop'>顶部</view>
wxss部分:
page{
width: 100%;
height: 100%;
}
scroll-view{
height: 100%;
width: 100%;
}
view{
width: 100%;
height: 200px;
text-align: center;
line-height: 200px;
font-weight: 600;
}
view:nth-child(odd){
background-color: red;
}
.top{
width: 50px;
height: 50px;
position: fixed;
right: 10px;
bottom: 10px;
z-index: 1;
background-color: yellow;
color: red;
text-align: center;
line-height: 50px;
}