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How to achieve image carousel effect

php中世界最好的语言Original: 2018-03-14 17:44:272009browse

This time I will show you how to achieve the image carousel effect, and what are the precautions for achieving the image carousel effect. The following is a practical case, let's take a look.

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="http://pic.qiantucdn.com/58pic/14/60/54/32n58PICxE6_1024.jpg"></li>
    <li><img src="http://pic.qiantucdn.com/58pic/19/09/94/5678b76f75315_1024.jpg"></li>
    <li><img src="http://pic.qiantucdn.com/58pic/19/39/22/01D58PICFx7_1024.jpg"></li>
    <li><img src="http://pic.qiantucdn.com/58pic/19/11/08/5679490f4892d_1024.jpg"></li>
    <li><img src="http://pic.qiantucdn.com/58pic/18/44/26/5620690acb188_1024.jpg"></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":'0',"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":'0',"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":'0',"top":"0","display":"none"});
          oLi.eq(nextIndex).css("z-index","1");
        });break;
      default:break;
    }
   }
  });
</script>
</body>
</html>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

How to achieve image carousel effect

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