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How to achieve seamless scrolling of images on mobile terminals? (code)
- PHPzforward
- 2018-10-15 15:12:532239browse
The content of this article is about how to achieve seamless scrolling of images on the mobile terminal? (code), it has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
<!doctype html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width,user-scalable=no">
<title>Document</title>
<script type="text/javascript">
//获取html
var html = document.documentElement;
//设置html的字体大小 = 可视区的宽度 / 15
html.style.fontSize = html.clientWidth / 15 + 'px';
//阻止pc和浏览器默认行为。
document.addEventListener（'touchstart',function（ev）{
ev.preventDefault（）；
}）；
</script>
<style>
body{
margin: 0;
}
.wrap{
height: 4.68rem;
position: relative;
}
.list{
padding: 0;
margin: 0;
width:400%;
position: absolute;
top:0;
left:0;
list-style: none;
}
.list li{
float: left;
width:15rem;
}
.list img{
width:15rem;
display: block;
}
nav{
width:15rem;
height: 10px;
position: absolute;
bottom:5px;
z-index: 1;
text-align:center;
}
nav a{
width:15px;
height: 15px;
display: inline-block;
background: red;
border-radius:50%;
vertical-align:top;
}
nav a.active{
background:#fff;
}
</style>
</head>
<body>
<section>
<ul>
<li>
<img src="img/img.jpg" alt="" />
</li>
<li>
<img src="img/img2.jpg" alt="" />
</li>
<li>
<img src="img/img3.jpg" alt="" />
</li>
<li>
<img src="img/img4.jpg" alt="" />
</li>
</ul>
<nav>
<a href="javascript:;"></a>
<a href="javascript:;"></a>
<a href="javascript:;"></a>
<a href="javascript:;"></a>
</nav>
</section>
<script type="text/javascript">
var wrap=document.getElementsByClassName（"wrap"）[0],
list=document.getElementsByClassName（"list"）[0],
disX=0,
listL=0,
n=0,
w=wrap.clientWidth,
s=0,
timer=0;
a=document.getElementsByTagName（"a"）；
list.addEventListener（"touchstart",start）；
list.addEventListener（"touchmove",move）；
list.addEventListener（"touchend",end）；
list.innerHTML+=list.innerHTML;
len=list.children.length;
console.log（len）；
list.style.width=w*len+"px";
function start（ev）{
clearInterval（timer）；
var e=ev.changedTouches[0];
disX=e.pageX;
list.style.transition="none";
var num=Math.round（list.offsetLeft/w）；
list.style.left=num*w+"px";
if（num==0）{
num=a.length;
list.style.left=-num*w+"px";
}
if（-num==len-1）{
num=a.length-1;
list.style.left=-num*w+"px";
}
listL=this.offsetLeft;
}
function move（ev）{
var e=ev.changedTouches[0];
list.style.left=（e.pageX-disX）+listL+"px";
}
function end（）{
var num=Math.round（list.offsetLeft/w）；
console.log（num）
list.style.transition="0.5s";
list.style.left=num*w+"px";
a[n].className="";
a[（-num）%a.length].className="active";
n=（-num）%a.length;
timer=setInterval（function（）{
inn（）；
},1000）
s=-num;
}
timer=setInterval（function（）{
inn（）；
},1000）
function inn（）{
s++;
list.style.left=-s*w+"px";
list.style.transition="0.5s";
console.log（s）；
if（s>len-1）{
s=a.length-1;
list.style.transition="none";
list.style.left=-s*w+"px";
console.log（list.style.left）；
setTimeout（function（）{
list.style.transition="0.5s";
s++;
list.style.left=-s*w+"px";
a[n].className="";
a[s%a.length].className="active";
n=s%a.length;
},30）
}
a[n].className="";
a[s%a.length].className="active";
n=s%a.length;
}
</script>
</body>
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