微信小程序功能之全屏滚动效果的实现代码
时间：2022-04-29 10:08:03 | 栏目：JavaScript代码 | 点击：次
想做一个全屏滚动的效果，于是在网上找了一个差不多的例子，但是觉得有些地方不是很好，于是改进了一下；
先给大家展示下效果图，感觉不错，请参考实例代码。
代码：
wxml:
<!-- 第一页 -- >
<view id='hook1' class="section section01 {{scrollindex==0?'active':''}}" style='background:red' bindtouchstart="scrollTouchStart" bindtouchmove='scrollTouchMove' bindtouchend="scrollTouchEnd">
<view class='cont'>
<view class='cont-body'>
<view>one</view>
</view>
</view>
</view>
<!-- 第二页 -->
<view id='hook2' class="section section02 {{scrollindex==1?'active':''}}" style='background:pink' bindtouchstart="scrollTouchStart" bindtouchmove='scrollTouchMove' bindtouchend="scrollTouchEnd">
<view class='cont'>
<view class='cont-body'>
<view>two</view>
</view>
</view>
</view>
<!-- 第三页 -->
<view id='hook3' class="section section03 {{scrollindex==2?'active':''}}" style='background:blue' bindtouchstart="scrollTouchStart" bindtouchmove='scrollTouchMove' bindtouchend="scrollTouchEnd">
<view class='cont'>
<view class='cont-body'>
<view>three</view>
</view>
</view>
</view>
<!-- 第四页 -->
<view id='hook4' class="section section04 {{scrollindex==3?'active':''}}" style='background:green' bindtouchstart="scrollTouchStart" bindtouchmove='scrollTouchMove' bindtouchend="scrollTouchEnd">
<view class='cont'>
<view class='cont-body'>
<view>foure</view>
</view>
</view>
</view>
wxss:
page {
height: 100%;
background: fff;
color: #282828;
}
.container {
flex: 1;
flex-direction: column;
box-sizing: border-box;
padding: 0;
align-items: initial;
justify-content: first baseline;
}
.container-fill {
height: 100%;
overflow: hidden;
}
.scroll-fullpage {
height: 100%;
}
.section {
height: 100%;
}
.cont {
width: 100%;
height: 100%;
margin: 0 auto;
position: relative;
}
.cont .cont-body {
width: 75%;
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
js:
Page({
/**
* 页面的初始数据
*/
data: {
scrollindex: 0, // 当前页面的索引值
totalnum: 4, // 总共页面数
starty: 0, // 开始的位置x
startTime: 0, // 开始的时间戳
endy: 0, // 结束的位置y
endTime: 0, // 结束的时间戳
critical: 80, // 触发翻页的临界值
maxTimeCritical: 300, // 滑动的时间戳临界值上限
minTimeCritical: 100, // 滑动的时间戳临界值下限
margintop: 0, // 滑动下拉距离
currentTarget: null, // 当前点击的元素的id
},
scrollTouchStart: function(e) {
let py = e.touches[0].pageY,
stamp = e.timeStamp,
currentTarget = e.currentTarget.id;
console.log(py);
this.setData({
starty: py,
startTime: stamp,
currentTarget: currentTarget
})
},
scrollTouchMove(e) {
// console.log(e);
},
scrollTouchEnd: function(e) {
let py = e.changedTouches[0].pageY,
stamp = e.timeStamp,
d = this.data,
timeStampdiffer = stamp - d.startTime;
this.setData({
endy: py,
endTime: stamp
})
console.log('开始：' + d.starty, '结束：' + e.changedTouches[0].pageY);
console.log('时间戳之差: ' + timeStampdiffer);
if (timeStampdiffer <= d.maxTimeCritical && timeStampdiffer > d.minTimeCritical && (d.starty > e.changedTouches[0].pageY)) {
let currentTarget = parseInt(d.currentTarget.slice(4)),
nextTarget = currentTarget + 1;
const query = wx.createSelectorQuery();
query.select(`#hook${nextTarget}`).boundingClientRect();
query.selectViewport().scrollOffset();
query.exec(function (res) {
// console.log(res);
if (res[0] != null) {
wx.pageScrollTo({
scrollTop: res[0].height * currentTarget,
})
}
})
} else if (timeStampdiffer <= d.maxTimeCritical && timeStampdiffer > d.minTimeCritical && (d.starty < e.changedTouches[0].pageY)) { // 下拉
let currentTarget = parseInt(d.currentTarget.slice(4)),
preTarget = currentTarget - 2 == -1 ? 0 : currentTarget - 2;
const query = wx.createSelectorQuery();
query.select(`#hook1`).boundingClientRect();
query.selectViewport().scrollOffset();
query.exec(function (res) {
console.log(res);
wx.pageScrollTo({
scrollTop: res[0].height * preTarget
})
})
}
},
})
总结