原生JavaScript实现移动端滑动Banner效果

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
 <meta name="apple-mobile-web-app-capable" content="yes">
 <meta content="telephone=yes" name="format-detection" />
 <meta name="apple-mobile-web-app-status-bar-style" content="white">
 <meta name="x5-fullscreen" content="true">
 <meta name="apple-touch-fullscreen" content="yes">
 <title>Document</title>
 <style>
  *{margin:0;padding:0;}
  .box{
   height:200px;
   width:100%;
   overflow: hidden;
  }
  .movebox{
   height:200px;
   width:9000px;
   padding:0;
   position:relative;
   left:0;
  }
  .movebox li{
   height:200px;
   float:left;
   list-style:none;
   font-size:30px;
   color:#fff;
  }

 </style>
 <script>
  window.onload = function(){

   var moveX,  //手指滑动距离
    endX,  //手指停止滑动时X轴坐标
    cout = 0, //滑动计数器
    moveDir; //滑动方向
   var movebox = document.querySelector(".movebox"); //滑动对象
   var Li = movebox.querySelectorAll("li"); //滑动对象item
   var width = parseInt(window.getComputedStyle(movebox.parentNode).width); //滑动对象item的宽度

   movebox.style.width = (width*4) + "px"; //设置滑动盒子width
   for(var i = 0; i < Li.length; i++){
    Li[i].style.width = width + "px"; //设置滑动item的width，适应屏幕宽度
   }

   //触摸开始
   function boxTouchStart(e){
    var touch = e.touches[0]; //获取触摸对象
    startX = touch.pageX; //获取触摸坐标
    endX = parseInt(movebox.style.webkitTransform.replace("translateX(", "")); //获取每次触摸时滑动对象X轴的偏移值
   }

   function boxTouchMove(e){
    var touch = e.touches[0];
    moveX = touch.pageX - startX; //手指水平方向移动的距离

    if(cout == 0 && moveX > 0){  //刚开始第一次向左滑动时
     return false;
    }

    if(cout == 3 && moveX < 0){  //滑动到最后继续向右滑动时
     return false;
    }

    movebox.style.webkitTransform = "translateX(" + (endX + moveX) + "px)"; //手指滑动时滑动对象随之滑动
   }

   function boxTouchEnd(e){
    moveDir = moveX < 0 ? true : false;  //滑动方向大于0表示向左滑动，小于0表示向右滑动
    //手指向左滑动
    if(moveDir){

     if(cout<3){
      movebox.style.webkitTransform = "translateX(" + (endX-width) + "px)";
      cout++;
     }
    //手指向右滑动
    }else{
     //滑动到初始状态时返回false
     if(cout == 0){
      return false;
     }else{
      movebox.style.webkitTransform = "translateX(" + (endX+width) + "px)";
      cout--;
     }
    }
   }

   //滑动对象事件绑定
   movebox.addEventListener("touchstart", boxTouchStart, false);
   movebox.addEventListener("touchmove", boxTouchMove, false);
   movebox.addEventListener("touchend", boxTouchEnd, false);
  }
 </script>
</head>

<body style="position:absolute;width:100%;overflow:hidden;">
 <div class="box">
  <ul class="movebox" style="transition-duration:0.2s;transform: translateX(-0px);">
   <li style="background:red;">1</li>
   <li style="background:yellow">2</li>
   <li style="background:blue">3</li>
   <li style="background:green">4</li>
  </ul>
 </div>
</body>

</html>