微信小程序放回顶部
页面返回顶部
<image src='/images/top.png' class='goTop' hidden='{{!floorstatus}}' bindtap="goTop"></image>
.goTop{
height: 80rpx;
width: 80rpx;
position: fixed;
bottom: 50rpx;
background: rgb(255,255,255);
right: 30rpx;
border-radius: 50%;
}
onPageScroll: function (e) {
console.log(e)
if (e.scrollTop > 100) {
this.setData({
floorstatus: true
});
} else {
this.setData({
floorstatus: false
});
}
},
//回到顶部
goTop: function (e) { // 一键回到顶部
if (wx.pageScrollTo) {
wx.pageScrollTo({
scrollTop: 0
})
} else {
wx.showModal({
title: '提示',
content: '当前微信版本过低,无法使用该功能,请升级到最新微信版本后重试。'
})
}
},
scroll-view 盒子滚动到顶部
<scroll-view scroll-y scroll-top='{{topNum}}' bindscroll="scrolltoupper"> <image src='../../img/button-top.png' class='goTop' hidden='{{!floorstatus}}' bindtap="goTop"></image></scroll-view>
.goTop{
height: 80rpx;
width: 80rpx;
position: fixed;
bottom: 50rpx;
background: rgba(0,0,0,.3);
right: 30rpx;
border-radius: 50%;
}
data:{
topNum: 0
}
// 获取滚动条当前位置
scrolltoupper:function(e){ console.log(e) let t = e.detail.scrollTop; if (t > 100 && !this.data.floorstatus) { // 避免重复setData this.setData({ floorstatus: true }); } if(t <= 100 && this.data.floorstatus){ this.setData({ floorstatus: false }); } }, //回到顶部 goTop: function (e) { // 一键回到顶部 this.setData({ topNum: this.data.topNum = 0 }); },