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How to implement image carousel with jQuery

亚连

Jun 07, 2018 am 10:59 AM

jqueryImage Carousel

This article mainly introduces the simple image carousel effect implemented by jQuery, and analyzes the related implementation techniques of jQuery combining time function and random number operation to dynamically transform page elements in the form of a complete example, with features such as fixed direction sliding, fade-in and fade-out, etc. Switching effect, the code is very simple and practical, friends in need can refer to

This article describes the simple image carousel effect implemented by jQuery. Share it with everyone for your reference, the details are as follows:

Let’s take a look at the running effect first:

The specific code is as follows :

<!DOCTYPE html>
<html>
<head>
<title>jquery实现图片轮播效果</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<style>
#lunbo{width: 600px;height: 300px;margin: 0 auto;overflow: hidden;}
#pics{width: 600px;height: 300px;cursor: pointer;position: relative;}
ul li{width: 600px;height: 300px;list-style: none;position: absolute;top: 0;left: 0;display: none;}
img{width: 600px;height: 300px;}
</style>
</head>
<body>
<p id="lunbo">
  <ul id="pics">
    <li style="display: inline;"><img  src="/static/imghwm/default1.png"  data-src="http://pic.qiantucdn.com/58pic/14/60/54/32n58PICxE6_1024.jpg"  class="lazy"   alt="How to implement image carousel with jQuery" ></li>
    <li><img  src="/static/imghwm/default1.png"  data-src="http://pic.qiantucdn.com/58pic/19/09/94/5678b76f75315_1024.jpg"  class="lazy"   alt="How to implement image carousel with jQuery" ></li>
    <li><img  src="/static/imghwm/default1.png"  data-src="http://pic.qiantucdn.com/58pic/19/39/22/01D58PICFx7_1024.jpg"  class="lazy"   alt="How to implement image carousel with jQuery" ></li>
    <li><img  src="/static/imghwm/default1.png"  data-src="http://pic.qiantucdn.com/58pic/19/11/08/5679490f4892d_1024.jpg"  class="lazy"   alt="How to implement image carousel with jQuery" ></li>
    <li><img  src="/static/imghwm/default1.png"  data-src="http://pic.qiantucdn.com/58pic/18/44/26/5620690acb188_1024.jpg"  class="lazy"   alt="How to implement image carousel with jQuery" ></li>
  </ul>
</p>
<script type="text/javascript">
$(document).ready(function(){
  var oLi = $("li");
  var liWidth = oLi.eq(0).width();
  var liHeight = oLi.eq(0).height();
   //每隔3秒进行轮播
  var timer = setInterval(change,3000);
    //鼠标放置在图片上时停止轮播，移开时继续轮播
    $("p").mouseover ( function(){
    clearInterval(timer);
  })
  $("p").mouseout (function(){
    timer = setInterval(change,3000);
  })
  //轮播函数
  var prevIndex = 0,nextIndex = 1;
  function change(){
    if (prevIndex == oLi.length-1 ) {//若当前图片是最后一张图片，下一张出现首张图片
      nextIndex = 0;
    }
    var n = Math.floor(Math.random()*3);
    if (n == 0) {
      fade(prevIndex,nextIndex);
    }
    else if (n== 2) {
      slide(prevIndex,nextIndex);
    }
    else{
      grap(prevIndex,nextIndex);
    }
    prevIndex = nextIndex;
    nextIndex ++;
  }
  //淡入淡出效果,
   function fade(prevIndex,nextIndex){
    //传入当前显示图片以及下一张图片的索引
    oLi.eq(prevIndex).fadeOut(1000);
    oLi.eq(nextIndex).fadeIn(1000);
   }
   //向左右滑动效果
   function slide(prevIndex,nextIndex){
    var rand = Math.floor(Math.random()*2);
    oLi.eq(nextIndex).show();
    oLi.eq(nextIndex).css("z-index","-1");
    if (rand) {
      //向左滑动
      oLi.eq(prevIndex).animate({left: -liWidth},1000,fun);
    }
    else{
      oLi.eq(prevIndex).animate({left: liWidth},1000,fun);
    }
    function fun(){
      oLi.eq(prevIndex).css({"left":"0","display":"none"});
      oLi.eq(nextIndex).css("z-index","1");
    }
   }
   //收缩效果
   function grap(prevIndex,nextIndex){
    var rand = Math.floor(Math.random()*4);
    oLi.eq(nextIndex).show();
    oLi.eq(nextIndex).css("z-index","-1");
    switch (rand){
      case 0://向左上角滑动
        oLi.eq(prevIndex).animate({left: -liWidth,top: -liHeight},1000,function(){
          oLi.eq(prevIndex).css({"left":"0","top": "0","display":"none"});
          oLi.eq(nextIndex).css("z-index","1");
        });break;
      case 1://向右上角滑动
        oLi.eq(prevIndex).animate({left: liWidth,top: -liHeight},1000,function(){
          oLi.eq(prevIndex).css({"left":&#39;0&#39;,"top":"0","display":"none"});
          oLi.eq(nextIndex).css("z-index","1");
        });break;
      case 2://向右下角滑动
        oLi.eq(prevIndex).animate({left: liWidth,top: liHeight},1000,function(){
          oLi.eq(prevIndex).css({"left":&#39;0&#39;,"top":"0","display":"none"});
          oLi.eq(nextIndex).css("z-index","1");
        });break;
      case 3://向左下角滑动
        oLi.eq(prevIndex).animate({left: -liWidth,top: liHeight},1000,function(){
          oLi.eq(prevIndex).css({"left":&#39;0&#39;,"top":"0","display":"none"});
          oLi.eq(nextIndex).css("z-index","1");
        });break;
      default:break;
    }
   }
  });
</script>
</body>
</html>

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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