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jQuery implements option linkage carousel effect [with examples]_jquery

WBOY
WBOYOriginal
2016-05-16 15:04:501326browse
<!doctype html>
<html lang="en">
 <head>
 <meta charset="UTF-8">
 <meta name="Generator" content="EditPlus&reg;">
 <meta name="Author" content="">
 <meta name="Keywords" content="">
 <meta name="Description" content="">
 <link rel="stylesheet" href="css/baner.css">
 <script src="js/jquery-1.11.3.js"></script>
 <script src="js/index.js"></script>
 <title>JQ轮播三级连锁</title>
 </head>
 <body>
  <div class="parent">
   <div class="top">
    <p>
      <a href="">创意空间</a>
      <a href="">永恒的爱</a>
      <a href="">浪漫真情</a>
      <a href="">珍贵独特</a>
    </p>
   </div>
   <div class="fours">
    <a href=""><img src="img/1.jpg" alt=""></a>
    <a href=""><img src="img/2.jpg" alt=""></a>
    <a href=""><img src="img/3.jpg" alt=""></a>
    <a href=""><img src="img/4.jpg" alt=""></a>
   </div>
  </div>
 </body>
</html>

CSS

*{
  border:none;
  margin: 0;
  padding: 0;
  list-style: none;
  outline: none;
}
html,body{
  width: 100%;
  height: 100%;
}
/*方法二*/
body{
  display: flex;
  align-items: center;/****水平居中****/
  justify-content: center;/*垂直居中*/
}
.parent{
  width: 750px;
  height: 400px;
  /*方法一*/
  /*margin: 0 auto;*/
  /*position: relative;*/
  /*top: 50%;*/
  /*margin-top: -200px;*/
}
/*轮播*/
.top p{
  width: 90%;
  margin: 0 auto;
}
.top p a{
  display: inline-block;
  line-height: 30px;
  width: 23%;
  padding: 10px 0;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  color: slategray;
}
.top p a.selected{
  border: 2px solid #e4393c;
  color: #e4393c;
}
/*图片*/
.fours{
  width: 650px;
  margin: 0 auto;
  height: 300px;
  position: relative;
  margin-top: 30px;
}
.fours a{
  position: absolute;
}

JS

Define variables and timers. Variables are equivalent to index in eq(index). Automatic carousel is possible. The key is how to correspond to the desired carousel screen when the mouse enters the tab area.

Method: Stop the timer, get the current tab subscript, and display the matching carousel screen. 

var a=0;
var t=null;
$(function(){
  $('.fours>a:not(:first-child)').hide();
  t=setInterval("autoMove()",2000);
  //鼠标进入轮播停止
  $('.parent').hover(function(){clearInterval(t)},function(){t=setInterval("autoMove()",2000);});
// 当鼠标进去对应选项时候图片对应变化
  $(".top p>a").hover(function(){
   clearInterval(t);
   var num=$(this).index();
   showThis(num);
  //console.log(num);
  })
});
function autoMove(){
 a++;
 if(a>=4){
  a=0;
 }
 play(a);
}
function play(a){
  $('.fours>a').filter(":visible").fadeOut(500).parent().children().eq(a).fadeIn(1000);
  $('.top p a').eq(a).addClass("selected").siblings().removeClass("selected");
}
//鼠标进入的情况
function showThis(sum){
  $(".fours>a").eq(sum).fadeIn(1000).siblings().fadeOut(500);
  $(".top p a").eq(sum).addClass("selected").siblings().removeClass("selected");
}

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