Single picture pan switching implementation code-JS Tutorial-php.cn

Single picture pan switching implementation code

小云云

Release： 2018-01-30 09:18:18

Original

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This article mainly introduces the js implementation of single picture translation switching effect in detail. After a picture is moved to the left, it is moved from the bottom back to the right and waits for the next cycle. Then let's study this article.

Since I don’t need the manual switching function, I deleted that part of the content, mainly to increase the seamless switching effect.

The principle is also very simple. After moving a picture to the left, it moves back to the right from the bottom and waits for the next cycle.

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <script src="js/jquery-1.10.1.min.js"></script>
</head>
<body> 
 <p class="wrapper"> 
  <h1>jquer实现图片切换</h1> 
  <p id="focus"> 
   <ul> 
    <!-- 这里有三个z-index的设置 -->
     <li><p class="switch_pic" style="z-index: 3;background: url(&#39;imgs/01.jpg&#39;) center center;background-size: cover;"></p></li> 
     <li><p class="switch_pic" style="z-index: 2;background: url(&#39;imgs/02.jpg&#39;) center center;background-size: cover;"></p></li> 
     <li><p class="switch_pic" style="z-index: 1;background: url(&#39;imgs/03.jpg&#39;) center center;background-size: cover;"></p></li> 
     <li><p class="switch_pic" style="background: url(&#39;imgs/04.jpg&#39;) center center;background-size: cover;"></p></li>
     <li><p class="switch_pic" style="background: url(&#39;imgs/meiko2.jpg&#39;) center center;background-size: cover;"></p></li>
     <li><p class="switch_pic" style="background: url(&#39;imgs/meiko7.jpg&#39;) center center;background-size: cover;"></p></li>
   </ul> 
   </p> 
  </p> 
  <script type="text/javascript">
  $(function() { 
  var sWidth = $("#focus").width(); 
  var len = $("#focus ul li").length; 
  var index = 0; 
  var picTimer; 
  var $pics = $("#focus ul li").find(&#39;.switch_pic&#39;);//获取所有图片

   showPics(index); //网页打开立即执行一次动画
   picTimer = setInterval(function() { 
    index++; 
    if(index == len) {index = 0;} 
    showPics(index); 
   },3000);//3000毫秒的间隔

  //显示图片函数，根据接收的index值显示相应的内容 
  function showPics(index) { //普通切换 
   var nowLeft = -sWidth; //每次移动固定量

   var $pic = $pics.eq(index);//获取当前要移出的图片
   var $nexPic = $pics.eq((index+1)%len);//当前要移入的图片
   var $nexnexPic = $pics.eq((index+2)%len);//下一个要移入的图片
   $nexPic.css("left",sWidth);//下一个图片移动到最右

   //当前要移出的图片开始左移，模式设为平滑"linear"，速度和间隔一样
   $pic.animate({"left":nowLeft},3000,"linear",function(){
    // 当前图片完全移出后，重新设置z-index
    $pic.css("z-index",1);
    $nexPic.css("z-index",3);
    $nexnexPic.css("z-index",2);
   });
   //当前要移入的图片同时左移
   $nexPic.animate({"left":0},3000,"linear");
  } 
 }); 
</script>
<style type="text/css">
 *{margin:0;padding:0;} 
 body{font-size:12px;color:#222;font-family:Verdana,Arial,Helvetica,sans-serif;background:#f0f0f0;} 
 .clearfix:after{content: ".";display: block;height: 0;clear: both;visibility: hidden;} 
 .clearfix{zoom:1;} 
 ul,li{list-style:none;} 
 img{border:0;} 
 .wrapper{width:800px;margin:0 auto;padding-bottom:50px;} 
 h1{height:50px;line-height:50px;font-size:22px;font-weight:normal;font-family:"Microsoft YaHei",SimHei;margin-bottom:20px;} 

 #focus{width:450px;height:350px;overflow:hidden;position:relative;} 
 #focus ul{height:380px;position:absolute;} 
 #focus ul li{float:left;width:450px;height:350px;overflow:hidden;position:absolute;background:#000;} 
 #focus ul li p{position:absolute;overflow:hidden;width: 450px;height: 350px;} 
</style>
</body>

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