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轻松实现javascript图片轮播特效_javascript技巧

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May 16, 2016 pm 03:20 PM

javascript Image Carousel

本文实例介绍了javascript图片轮播特效的详细代码以及实现思路，分享给大家供大家参考，具体内容如下

还是先来看一看效果图：

具体代码：

一、HTML代码分析

<body> 
  <div class="dota"> 
    <ul id="content"> 
      <li><a href="#"><img  src="/static/imghw/default1.png"  data-src="images/1.jpg"  class="lazy"/ alt="轻松实现javascript图片轮播特效_javascript技巧" ></a></li> 
      <li><a href="#"><img  src="/static/imghw/default1.png"  data-src="images/2.jpg"  class="lazy"/ alt="轻松实现javascript图片轮播特效_javascript技巧" ></a></li> 
      <li><a href="#"><img  src="/static/imghw/default1.png"  data-src="images/3.jpg"  class="lazy"/ alt="轻松实现javascript图片轮播特效_javascript技巧" ></a></li> 
      <li><a href="#"><img  src="/static/imghw/default1.png"  data-src="images/4.jpg"  class="lazy"/ alt="轻松实现javascript图片轮播特效_javascript技巧" ></a></li> 
      <li><a href="#"><img  src="/static/imghw/default1.png"  data-src="images/5.jpg"  class="lazy"/ alt="轻松实现javascript图片轮播特效_javascript技巧" ></a></li> 
    </ul> 
    <ul id="indicator"> 
      <li class="current"><a href="#">A版是一款手机DOTA应用，它涵盖了</a></li> 
      <li><a href="#">A版是一款手机应用，它涵盖了</a></li> 
      <li><a href="#">A版是一款手机应用，它涵盖了</a></li> 
      <li><a href="#">A版是一款手机应用，它涵盖了</a></li> 
      <li><a href="#">A版是一款手机应用，它涵盖了</a></li> 
    </ul> 
  </div> 
</body> 

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此效果的层次结构比较清楚：
1. class为data的div是最外层的容器，可以用来控制整个效果图显示的位置。

2. id为content的ul用来存放左侧滚动的图片。

3. id为indicator的ul用来显示右侧的指示栏。

二、CSS代码

*{margin: 0; padding: 0;} 
  
    img{ 
      border:0; 
    } 
  
    .dota{ 
      width:570px; 
      height: 230px; 
      margin:100px auto; 
      position: relative; 
      overflow: hidden; 
    } 
  
    .dota #content{ 
      float: left; 
      list-style: none; 
      position: absolute; 
      width:380px; 
      height:230px; 
    } 
    .dota #content img{ 
      width:380px; 
      height:230px;  
    } 
    .dota #indicator{ 
      float: right; 
      list-style: none; 
      width:180px; 
      height:220px; 
      padding: 5px; 
      background-color: #100F13; 
    } 
    .dota #indicator li{ 
      width: 180px; 
      height: 44px; 
      background: url(images/anniu.png) 0 -44px; 
    } 
  
    .dota #indicator li.current{ 
      background-position: 0 0; 
    } 
  
    .dota #indicator li a{ 
      display: block; 
      width: 160px; 
      height: 34px; 
      padding: 5px 0 5px 25px; 
    } 
  
    .dota #indicator li a:link , .dota #indicator li a:visited{ 
      text-decoration: none; 
      color: #686477; 
      font: 12px/145% "宋体"; 
    } 

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这里，我对indicator中li的代码进行说明：
.dota #indicator li中的css代码就是设置右侧指示栏中的每一项，注意到，这里使用了background属性，也就是说li的背景是一张图片。准备好的图片如下：

这张准备好的图片大小为 180 * 88，而.dota #indicator li中的background属性设置的position属性大小为 0 -44px, 即截取的图片的下半部分；所以indicator中所有的背景图片显示的是下半部分比较暗的部分；而.dota #indicator li.current 的position属性大小为 0 0，所以默认情况下indicator的第一个显示高亮，其余的显示为暗黑的那部分。然后通过JQuery代码控制current属性作用在 "谁" 身上来切换选中状态。

三、JQuery代码

<script type="text/javascript"> 
  
    $(function(){ 
  
      var nowImage = 0; 
  
      /* 为定时动画服务 */
      $(".dota #content li").first().clone().appendTo($(".dota #content")); 
  
      var timer = setInterval(autoAnimate, 1500); 
  
      $(".dota").mouseenter(function(){ 
        clearInterval(timer); 
      }).mouseleave(function(){ 
        timer = setInterval(autoAnimate, 1500); 
      });; 
  
      $(".dota #indicator li").mouseenter(function(){ 
        $(this).addClass("current").siblings().removeClass("current"); 
        nowImage = $(this).index(); 
        /*stop() 可以立刻清楚以前的动画，防止动画叠加*/
        $(".dota #content").stop().animate({"top": -230 * nowImage}, 1000); 
      }); 
  
      function autoAnimate(){ 
        if(nowImage == 4){ 
          nowImage = 0; 
            
          $(".dota #indicator li").eq(nowImage).addClass("current").siblings().removeClass("current"); 
          $(".dota #content").stop().animate({"top":-230 * 5}, 1000,function(){ 
            $(".dota #content").css("top",0); 
          }); 
        } 
        else{ 
          nowImage++; 
          $(".dota #content").stop().animate({"top": -230 * nowImage}, 1000); 
          $(".dota #indicator li").eq(nowImage).addClass("current").siblings().removeClass("current"); 
          } 
      } 
  
    }); 
  
  </script>

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以上就是轻松实现javascript图片轮播特效的详细代码，希望对大家的学习有所帮助。

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