原生js实现图片层叠轮播切换效果_javascript技巧-js教程-PHP中文网

本文实例介绍了js焦点图片层叠轮播切换滚动效果，分享给大家供大家参考，具体内容如下

效果图：

功能描述：

　　自定义图片尺寸；
　　每隔一段时间自动滚动图片；
　　每次动画执行的时候改变图片的位置，宽高以及其它属性也要跟随着变化；
　　鼠标移上图片，显示当前图片的详细信息；
　　点击按钮向前向后滚动；

详细代码:
　　html代码:

<!DOCTYPE html>
<!-- saved from url=(0062)http://x1.xiuimg.com/style/xiu/woxiu/v1/tpl/topic/xiuxuan.html -->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title></title>
<style type="text/css">
 *{margin:0px; padding:0px;font-family:"Microsoft YaHei"}
 ol,ul{list-style:none;}
 cite,em,i{font-style:normal} 
 * html .clearfix { height: 1%; }
 .clearfix { display: block; }
 .myclearfix:after { clear:both; visibility:hidden;}
 .myclearfix { display: block; _display:inline-block; overflow:hidden;} 

 #largerImages{position:relative;width:1000px;margin:0 auto;height:520px;overflow:hidden;}
 #largerImages li{box-shadow:1px 1px 12px rgba(200, 200, 200, 1);width:368px;height:368px; position:absolute;top:10px;overflow:hidden;color:#fff;}
 #largerImages li .cover{background-color:#333;opacity:0.5;filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);height:100%;width:100%;display:block;position:absolute;top:0px;}
 #largerImages img{border:0px;width:100%;height:100%;}
 #largerImages .previous{left:13%;}
 #largerImages .next{left:53%;}
 #largerImages .previous,#largerImages .next{cursor:pointer; position:absolute;z-index:100; top:25%;height:60px;line-height:60px;width:30px;color:#fff;text-align:center;}
 #largerImages .previous span,#largerImages .next span{position:absolute;top:0px;left:0px;height:100%;width:100%;display:block;background-color:#000;opacity:0.4;filter: progid:DXImageTransform.Microsoft.Alpha(opacity=40);}
 #largerImages .previous em,#largerImages .next em{height:100%;width:100%;display:block;position:absolute;top:0px;left:0px;font-size:26px; font-family: "宋体";}
 #largerImages li span,#largerImages li em{position:absolute;left:0px;width:100%;height:30px;line-height:30px; bottom:0px;text-align:center;display:block;color:#fff;}
 #largerImages li span{background-color:#000;opacity:0.5;filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);font-size:12px;}

</style>
</head>
<body>

<ul id = "largerImages">
 <p class="previous"><span> </span><em><</em></p>
 <p class="next"><span> </span><em>></em></p>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/9/90/qq-srntbvlhcw_b_56.com_160106133546.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/96/58/dc15170219625_b_56.com_151201150445.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/9/90/qq-srntbvlhcw_b_56.com_160106133546.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/96/58/dc15170219625_b_56.com_151201150445.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/9/90/qq-srntbvlhcw_b_56.com_160106133546.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
</ul>

<script type="text/javascript" src="../../lib/seajs/sea.js"></script>
<script type="text/javascript" src="../../lib/base/1.0.x/base.js"></script>
<script type="text/javascript">
 seajs.use(['lib/jquery/1.11.x/index.js','_example/rotateBox/index.js'],function($,carousel) {
  carousel.init({
   wapper: $('#largerImages'),

   //所有图片以此来按比例定义宽高
   imgWidth: 450,
   imgHeight: 300,

   spacing: {
    left: 60, //每张图片左边距离相差多少
    top: 30, //每张图片顶部距离相差多少
    width: 60, //每张图片宽度相差多少
    height: 60 //每张图片高度相差多少
   }
  });
 });
</script>
</body>
</html>

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js 代码:

define(function(require, exports, module) {
 'use strict';
 var $ = require('lib/jquery/1.11.x/index.js');

 var carousel = {

  _initData:false, //判断动画是否执行完毕

  init: function(options) {
   var t = this;
   t._wapper = options.wapper;
   t._grids = t._wapper.find('li');
   t._gridsWidth = options.imgWidth;
   t._gridsHeight = options.imgHeight; 
   t._spacing = options.spacing;

   //取居中图片
   t._middle = t._grids.length % 2 == 0 &#63; t._grids.length / 2 : parseInt(t._grids.length / 2);

   //存放各图片参数
   t._arr = {
    left: [],
    top: [],
    zIndex: [],
    width: [],
    height: []
   }

   if ( !t._initData ) {
    var interval;
    interval = setInterval(function(){
     $('.previous').click();
    },10000);
   }

   t._largerImages();
   t._reposition();
   t._mouseEnter(t._grids) //鼠标移动上去显示主播昵称
  },
  //初始化定位：
  _largerImages: function() {
   var t = this;

   var front = t._middle;
   var avtive = t._middle;
   var last = t._grids.length;

   t._grids.each( function(i, img) {
    
    if (i == t._middle) {

     t._grids.eq(i).css({
      zIndex: 99,
      top: 0,
      left: t._spacing.left * i,
      height: t._gridsHeight,
      width: t._gridsWidth
     }); 

    } else if ( i < t._middle ) {

     t._grids.eq(i).css({
      zIndex: i,
      top: t._spacing.top * front,
      left: t._spacing.left * i,
      height: t._gridsHeight - t._spacing.height * front,
      width: t._gridsWidth - t._spacing.width * front
     });
     
     front--;

    } else {

     last --;

     t._grids.eq(last).css({
      zIndex: i,
      top: t._spacing.top * avtive,

      left: t._spacing.left * last + t._spacing.width * avtive,
      height: t._gridsHeight - t._spacing.height * avtive,
      width: t._gridsWidth - t._spacing.width * avtive
     });

     avtive --;
    };
   });
  },
  //翻页动画
  _reposition: function() {
   var t = this;

   //把各属性值传到数组里面
   t._grids.each( function(i,img) {
    t._arr.left.push(t._grids.eq(i).position().left);
    t._arr.top.push(t._grids.eq(i).position().top);
    t._arr.width.push(t._grids.eq(i).width());
    t._arr.height.push(t._grids.eq(i).height());
    t._arr.zIndex.push(t._grids.eq(i).css('z-index'));
   });

   //向前翻页
   $('.previous').bind('click',function() {
    if ( !t._initData && t._arr.left.length != 0) {

     t._initData = true;

     //重新获取选择器
     var grids = t._wapper.find('li'); 
     
     for (var i = 1; i < grids.length ; i ++) {

      grids.eq(i).animate({
       zIndex: t._arr.zIndex[i - 1],
       left: t._arr.left[i - 1],
       top: t._arr.top[i - 1], 
       width: t._arr.width[i - 1], 
       height: t._arr.height[i - 1],
      },200,
      function() {
       t._initData = false;
       grids.find('i').addClass('cover');
       grids.eq(t._middle + 1).find('i').removeClass('cover');
      });
     };

     grids.eq(0).animate({
      left: t._arr.left[ grids.length - 1], 
      top: t._arr.top[ grids.length - 1], 
      width: t._arr.width[ grids.length - 1], 
      height: t._arr.height[ grids.length - 1],
      zIndex: t._arr.zIndex[ grids.length - 1]
     },200,
     function(){
      $(this).appendTo(t._wapper);
     });

    }
   });
   //向后翻页
   $('.next').bind('click',function() {
    if ( !t._initData && t._arr.left.length != 0) {

     t._initData = true;

     //重新获取选择器
     var grids = t._wapper.find('li'); 
     
     for (var i = 0; i < grids.length - 1; i ++) {
      grids.eq(i).animate({
       left: t._arr.left[i + 1],
        top: t._arr.top[i + 1], 
        width: t._arr.width[i + 1], 
        height: t._arr.height[i + 1],
        zIndex: t._arr.zIndex[i + 1]
        },200,function() {
        t._initData = false;
       });
     };
     grids.eq(grids.length - 1).animate({
      left: t._arr.left[0], 
      top: t._arr.top[0], 
      width: t._arr.width[0], 
      height: t._arr.height[0],
      zIndex: t._arr.zIndex[0]
     },200,
     function(){
      $(this).prependTo(t._wapper);
      grids.find('i').addClass('cover');
      grids.eq(t._middle - 1).find('i').removeClass('cover');
     });

    }
   });
  },
  //鼠标进入图片效果
  _mouseEnter: function(grids) {
   grids.each(function(i){
    $(this).mouseenter(function() {
     $(this).find('.tab_name').animate({
      bottom:0,opacity: 'show'
     },200);
    });
    $(this).mouseleave(function() {
     $(this).find('.tab_name').animate({
      bottom:-50,opacity: 'hide'
     },200);
    });
   });
  },
 };

 return carousel;
});

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