小程序回到顶部
一。
onPageScroll: function (e) {
console.log(e)
if (e.scrollTop 50) {
that.setData({
buyshow: true,
})
} else {
that.setData({
buyshow: false,
})
}
},
二 scroll-view scroll-y="true" scroll-top='{{topNum}}' style="{{buyshow?'height:86vh':'height:100%;'}};" wx:if="{{detail!=''}}" bindscroll="PageScroll" bindscrolltolower="loadMore" scroll-into-view="NAV{{navon}}"
PageScroll(e){
if (e.detail.scrollTop 50) {
that.setData({
buyshow: true,
scrollTop: e.detail.scrollTop
})
}else{
that.setData({
buyshow: false,
scrollTop: e.detail.scrollTop
})
}
}
