支持移动端原生js轮播图

艾泽语
2023-03-14
本文向大家介绍支持移动端原生js轮播图，包括了支持移动端原生js轮播图的使用技巧和注意事项，需要的朋友参考一下
直接上代码，自行复制粘贴，本人是新手，欢迎指正。
<!DOCTYPE HTML>
<html lang="en-US">
<head>
 <meta charset="UTF-8">
 <title>轮播图</title>
 <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0;" name="viewport" />
 <style type="text/css">
 .container{
  width: 500px;
  height: 400px;
  overflow: hidden;
  margin: 50px auto;
  position: relative;
 }
 .list{
  width: 2500px;
  height: 400px;
  position: absolute;
  left: 0px;
 }
 .list img{
  float: left;
  height: 400px;
  width: 500px;
 }
 .buttons{
  position: absolute;
  width: 75px;
  height: 20px;
  bottom: 10px;
  left: 50%;
  margin-left: -38px;
  z-index: 2;
 }
 .buttons span{
  width: 10px;
  height: 10px;
  margin-right: 5px;
  display: inline-block;
  border-radius: 5px;
  background-color: gray;
  opacity: 0.5;
  cursor: pointer;
 }
 .buttons .on{
  background-color: rgb(255,50,50);
  opacity: 0.8;
 }
 .arrow{
  position: absolute;
  background-color: gray;
  opacity: 0.5;
  height: 40px;
  width: 40px;
  color: #fff;
  text-decoration: none;
  line-height: 40px;
  font-size: 28px;
  font-weight: 800;
  text-align: center;
 }
 #prev{
  top:50%;
  left: 10px;
  margin-top:-20px;
 }
 #next{
  top:50%;
  right: 10px;
  margin-top:-20px;
 }
 </style>
</head>
<body>
 <div id="container" class="container">
 <div id="list" class="list">
  <img src="1.jpg">
  <img src="2.jpg">
  <img src="3.jpg">
  <img src="4.jpg">
  <img src="5.jpg">
 </div>
 <div id="buttons" class="buttons">
  <span index="0" class="on"></span><!--
  --><span index="1"></span><!--
  --><span index="2"></span><!--
  --><span index="3"></span><!--
  --><span index="4"></span>
 </div>
 <a href="javascript:;" rel="external nofollow" rel="external nofollow" id="prev" class="arrow">&lt;</a>
 <a href="javascript:;" rel="external nofollow" rel="external nofollow" id="next" class="arrow">&gt;</a>
 </div>
 <script type="text/javascript">
 window.onload = function(){
  var container = document.getElementById('container');
  var list = document.getElementById('list');
  var buttons = document.getElementById('buttons');
  var buttonsItem = buttons.getElementsByTagName('span');
  var prev = document.getElementById('prev');
  var next = document.getElementById('next');
  var index = 0;
  var startX = 0;
  var endX = 0;


  container.addEventListener('touchend',function(event){
  if(event.changedTouches.length==1&&this.getAttribute('disabled')!='disabled'){
   var touch = event.changedTouches[0];
   endX = touch.pageX;
   var offset = endX-startX;
   console.log(offset);
   if(Math.abs(offset)>=50){
   if(offset<0){// 右滑
    nextMethod();
   }else{
    prevMethod();
   }
   }
  }
  });

  container.addEventListener('touchmove',function(){
  event.preventDefault();
  })

  container.addEventListener('touchstart',function(event){
  if(event.targetTouches.length==1&&this.getAttribute('disabled')!='disabled'){ 
   var touch = event.targetTouches[0];
   startX = touch.pageX;
  }
  })

  prev.addEventListener('click',function(){ 
  if (this.getAttribute('disabled')=='disabled') {
   return false;
  }
  prevMethod();
  });

  next.addEventListener('click',function(){
  if (this.getAttribute('disabled')=='disabled') {
   return false;
  }
  nextMethod();
  });

  for(var i=0;i<buttonsItem.length;i++){
  buttonsItem[i].onclick = function(){
   if (this.getAttribute('disabled')=='disabled') {
   return false;
   }
   var i = this.getAttribute('index');
   var length = Math.abs((i-index)*500);
   var direction = 'right';
   if (length<0) {
   direction = 'left';
   }
   index = i;
   document.getElementsByClassName('on')[0].setAttribute('class','');
   buttonsItem[index].className = 'on';
   animate(direction,1,length);
  }
  }

  function prevMethod(){
  if(index==0){
   index = 4;
   animate('right',40,2000);
  }else{
   index--;
   animate('left',1,500);
  }
  document.getElementsByClassName('on')[0].setAttribute('class','');
  // buttonsItem[index].setAttribute('class','on');
  buttonsItem[index].className = 'on';
  }

  function nextMethod(){
  if(index==4){
   index = 0;
   animate('left',40,2000);
  }else{
   index++;
   animate('right',1,500);
  }
  document.getElementsByClassName('on')[0].setAttribute('class','');
  buttonsItem[index].className = 'on';
  }

  function animate(direction,speed,length){
  var end = length/speed;
  var count = 0;
  for(var i=0;i<end;i++){
   setTimeout(function(){
    count++;
    var left = list.offsetLeft;
    if (direction=='right') {
    left -= speed;
    }else{
    left += speed;
    }
    list.style.left = left+'px';
    if(count<end-1){
    disabledButtons();
    }else{
    resumeButtons();
    }
   },speed*i);
   }
  }

  function disabledButtons(){
  for(var i=0;i<5;i++){
   buttonsItem[i].setAttribute('disabled','disabled');
  }
  prev.setAttribute('disabled','disabled');
  next.setAttribute('disabled','disabled');
  container.setAttribute('disabled','disabled');
  }

  function resumeButtons(){
  for(var i=0;i<5;i++){
   buttonsItem[i].removeAttribute('disabled');
  }
  prev.removeAttribute('disabled');
  next.removeAttribute('disabled');
  container.removeAttribute('disabled');
  }
 }
 </script>
</body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持小牛知识库。
支持移动端原生js轮播图

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