Home > Web Front-end > JS Tutorial > body text

JS makes mobile touch carousel effect

php中世界最好的语言
Release: 2018-04-14 09:45:34
Original
1835 people have browsed it

This time I will bring you JS to create a mobile touch carousel effect. What are the precautions to use JS to create a mobile touch carousel effect? ​​ The following is a practical case, let’s take a look.

The following is the complete code for the finger sliding carousel on the mobile terminal.

<!DOCTYPE html> 
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<style>
*{margin:0;padding:0;}
li{list-style:none;}
.lb{width:320px;height:130px;position:relative;margin:20px auto;overflow: hidden;}
.lb .lb_img{width:2240px;height:130px;position:absolute;left:-320px;}
.lb .lb_img img{width:320px;height:130px;float:left;display:block;}
.lb ul{width:35px;height:4px;position:absolute;bottom:10px;left:50%;margin-left:-15px;}
.lb ul li{width:4px;height:4px;border-radius:2px;border:0.25px solid #fff;margin-left:2.5px;background:#666;float:left;cursor:pointer;}
.lb ul .active{background:#fff;}
.lb ul li:hover{background:#fff;}
</style>
</head>
<body>
<p class="lb">
		<p class="lb_img">
			<img src="img/4.jpg">
			<img src="img/0.jpg">
			<img src="img/1.jpg">
			<img src="img/2.jpg">
			<img src="img/3.jpg">
			<img src="img/4.jpg">
			<img src="img/0.jpg">
		</p>
		<ul>
			<li class="active"></li>
			<li></li>
			<li></li>
			<li></li>
			<li></li>
		</ul>
</p>	
<script>
var lb = document.querySelector(".lb");
var lb_img = document.querySelector(".lb .lb_img");
var img = document.querySelectorAll(".lb .lb_img img")
var lis = document.querySelectorAll(".lb ul li");
var i=2;
 // 初始化手指坐标点
 var startPoint = 0;
 var startEle = 0;
 //手指按下
 lb.addEventListener("touchstart",function(e){
 startPoint = e.changedTouches[0].pageX;
 startEle = lb_img.offsetLeft;
 clearInterval(Time)
 });
 
 //手指滑动
 lb.addEventListener("touchmove",function(e){
 var currPoint = e.changedTouches[0].pageX; 
 var disX = currPoint - startPoint;
 var left = startEle + disX;
 lb_img.style.left = left + "px"; 
 });
 //当手指抬起的时候,
 lb.addEventListener("touchend",function(e){
 	var currPoint = e.changedTouches[0].pageX;
 	var disX = - (currPoint - startPoint);
 var left = startEle + disX;
 if(disX > 150){
 		i++;
	 	for(var q=0;q<lis.length;q++){
	  lis[q].className = &#39;&#39;; 
	 }
	 if(i == 7){
	 	i=2;
	 }
	 lis[i-2].className= "active" ;	 	
 	lb_img.style.left = -320*(Math.round(disX/320)+i+1)+ &#39;px&#39;; 		
 }else{
 	lb_img.style.left = -320*(i-1) + "px";
 }
 if(disX < -150){
 	i--;
 	for(var q=0;q<lis.length;q++){
  lis[q].className = &#39;&#39;;
  }
  if(i == 1){
 		i=6;
 	}
 	lis[i-2].className= "active" ; 		
 	lb_img.style.left = -320*(Math.round(-disX/320)+i-2) + &#39;px&#39;;
	 	
 }else{
 	lb_img.style.left = -320*(i-1) + "px";
 }
 Time=setInterval(autoplay,2000);
 })
//设置定时器
Time=setInterval(autoplay,2000);
 function autoplay(){
 i++;
 for(var q=0;q<lis.length;q++){
 lis[q].className = &#39;&#39;; 
 }
 if(i == 7){
 i=2;
 }
 lis[i-2].className= "active" ; 
 for(var a=0; a<320;a++){
  setTimeout(function(){
   var left = lb_img.style.left ? lb_img.style.left : "-320px";
   left = parseInt(left)-1;
   if(left<-1920){
   left=-321;
   }
   lb_img.style.left = left + "px";
  },a);
 }
 }
</script>
</body>
</html>
Copy after login

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

How to operate the case conversion of the first letter when jackson parses a json string

element-ui Implement import and export

The above is the detailed content of JS makes mobile touch carousel effect. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template