Melaksanakan kesan karusel imej (imej fokus) berdasarkan JQuery

Saya menulis imej fokus karusel mendatar dalam bentuk jq tulen, yang boleh ditukar dengan mengklik titik kecil atau butang kiri dan kanan Ia adalah jenis lebar tetap. Tidak sukar untuk menukar kepada lebar adaptif Tukar lebar bannerCon dalam CSS kepada peratusan, dan kemudian tukar lebar ul dan li untuk mengikut lebar bekas induk dalam js .

Serasi dengan pelayar IE6 dan ke atas, terdapat dua parameter yang boleh ditukar, kelajuan karusel dan selang penukaran.

Rendering adalah seperti berikut:

Kod html adalah seperti berikut:

<html>
<head>
 <meta charset="utf-8">
 <title>banner图</title>
 <link href="css/style.css" rel="stylesheet"/>
 <script src="js/jquery-1.9.1.min.js"></script>
 <script src="js/common.js"></script>
</head>
<body>
 <div class="wrap">
  <div class="banner">
   <div class="bannerCon">
    <ul class="imgList">
     <li><a href="#"><img src="images/banner01.jpg" alt=""/></a></li>
     <li><a href="#"><img src="images/banner02.jpg" alt=""/></a></li>
     <li><a href="#"><img src="images/banner03.jpg" alt=""/></a></li>
    </ul>
    <ul class="btnList clearfix">
     <li class="cur"><span></span></li>
     <li><span></span></li>
     <li><span></span></li>
    </ul>
    <span class="pre-nex prev"><</span> 
    <span class="pre-nex next">></span> 
   </div>
  </div>
 </div>
</body>
</html>

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Gaya CSS adalah seperti berikut:

@charset "utf-8";
/* 简单reset */
body, p, ul, ol, li {
  margin: 0;
  padding: 0;
}
ul, ol {
  list-style: none;
}
img { border:none; }
a,button{ outline: none; }
.clearfix:after {
  visibility: hidden;
  display: block;
  font-size: 0;
  content: " ";
  clear: both;
  height: 0;
} 
/* 具体样式 */
.banner {
  position: relative;
  height: 400px;
  overflow: hidden;
}
.banner .bannerCon {
  position: absolute;
  top: 0;
  left: 50%;
  width: 800px;
  height: 400px;
  margin-left: -400px;
  overflow: hidden;
}
.bannerCon .imgList {
  position: absolute;
  top: 0;
  left: 0;
  width: 99999px;
  height: 400px;
}
.bannerCon .imgList li {
  float: left;
  width: 800px;
  height: 400px;
}
.bannerCon .imgList li a {
  position: relative;
  display: block;
  height: 100%;
}
.bannerCon .imgList li img {
  width: 800px;
  height: 400px;
}
.bannerCon .pre-nex {
  display: none;
  position: absolute;
  top: 50%;
  width: 40px;
  height: 60px;
  margin-top: -40px;
  font: bold 40px/60px Simsun;
  color: #ccc;
  text-align: center;
  border:none;
  background: rgba(0,0,0,.30);
  filter:progid:DXImageTransform.Microsoft.Gradient(startColorStr=#4c000000, endColorStr=#4c000000);
  cursor: pointer;
  z-index: 3;
}
.bannerCon .pre-nex.show { display: inline-block; }
.bannerCon .prev { left: 13%; }
.bannerCon .next { right: 13%; }
.bannerCon .btnList {
  position: absolute;
  left: 0;
  bottom: 20px;
  width: 100%;
  height: 12px;
  text-align:center;
  z-index: 2;
  _overflow: hidden;
}
.bannerCon .btnList li { display: inline; }
.bannerCon .btnList li span {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin: 0 5px;
  border-radius: 6px;
  background-color:#14829e;
  cursor: pointer;
}
.bannerCon .btnList li.cur span { background-color: #f30; }

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Kod Js adalah seperti berikut:

//加载在文本读取之后的js语句 开始 =============================================================
  function Scroll(obj,speed,interval){  //父级容器，轮播速度，切换间隔
    $("."+obj).each(function(){
      var $box = $(this),
      $imgUl = $box.children(".imgList"),
      $imgLi = $imgUl.children("li"),
      $btnUl = $box.children(".btnList"),
      $btnLi = $btnUl.children("li"),
      $btnPreNex = $box.children(".pre-nex"),
      $btnPre = $box.children(".prev"),
      $btnNex = $box.children(".next"),
      n = $imgLi.length,
      width = $imgLi.width(),
      left = parseFloat($imgUl.css("left")),
      k = 0,
      Player;
      $imgUl.css("width",n*width);
      function scroll(){        //轮播事件
        $imgUl.stop().animate({left:-width},speed,function(){
          k += 1;
          $imgUl.css("left",0);
          $imgUl.children("li:first").appendTo($(this));
          $btnLi.removeClass('cur');
          if(k >= n){
            k = 0;
          }
          $btnUl.children("li").eq(k).addClass('cur');      
        });
      }
      $btnLi.click(function(){     //小圆点点击事件
        var index = $btnLi.index(this);  
        $(this).addClass('cur').siblings("li").removeClass('cur');
        if(index >= k){
          var dif = index-k;
          left = -dif*width;
          $imgUl.stop().animate({left:left},speed,function(){
            $imgUl.css("left",0);
            $imgUl.children("li:lt("+dif+")").appendTo($imgUl);  
          });
        }
        else{
          var j = n-(k-index);
          $imgUl.css("left",(index-k)*width);
          $imgUl.children("li:lt("+j+")").appendTo($imgUl);
          $imgUl.stop().animate({left:0},speed);  
        }
        k = index;
      });  
      $btnPreNex.click(function(){   //左右按钮点击事件
        var index = $btnLi.index(this);    
        if($(this).hasClass('next')){
          if(!$imgUl.is(":animated")){
            k += 1;
            $imgUl.animate({left:-width},speed,function(){
              $imgUl.css("left",0);
              $imgUl.children("li:first").appendTo($(this));
              if(k >= n){
                k = 0;
              }
              $btnUl.children("li").removeClass('cur').eq(k).addClass('cur');
            });
          }
        }
        else {
          if(!$imgUl.is(":animated")){
            k += -1;
            $imgUl.css("left",-width);
            $imgUl.children("li:last").prependTo($imgUl);
            $imgUl.stop().animate({left:0},speed);
            if(k < 0){
              k = n-1;
            }
            $btnUl.children("li").removeClass('cur').eq(k).addClass('cur');
          }
        }
      });    
      $box.hover(           //鼠标移入、移出事件
        function(){
          clearInterval(Player);
          $btnPreNex.addClass('show');
        },
        function(){
          Player = setInterval(function(){scroll()},interval);
          $btnPreNex.removeClass('show');
        }
        );
      Player = setInterval(function(){scroll()},interval);
    });
  }  
  $(function () {              //读取轮播事件
    Scroll("bannerCon",600,4000);
  });    