基于JS如何實(shí)現(xiàn)仿百度百家主頁的輪播圖效果

這篇文章將為大家詳細(xì)講解有關(guān)基于JS如何實(shí)現(xiàn)仿百度百家主頁的輪播圖效果，小編覺得挺實(shí)用的，因此分享給大家做個(gè)參考，希望大家閱讀完這篇文章后可以有所收獲。

HTML                 

 <div class="ShowEntry"> 
     <!-- <div id="widget_content_player" class="Player" alog-group="log-player">-->
       <!--------- 右擊箭頭--------->
       <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" id="widget_content_player_prev" class="prev carousel-btn-prev">
        <span class="icon-wrap"><img src="image/箭頭左.png"></span>
       </a>
       <div id="widget_content_player_wrapper" class="player">
        <!---------- 一張大圖和涂上的文字 ------->
        <div id="widget_content_player_imgView" class="imgview">
          <!---------- 一張大圖 ------->
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="https://cache.yisu.com/upload/information/20200622/114/76605.gif" hadcut="1" class="active" >
          </a>
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="image/95eef01f3a292df570506750b5315c6035a873e0.jpg" >   
         </a>
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="image/0824ab18972bd407e8f01db872899e510fb30944.jpg.png" >   
          </a>
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="image/9825bc315c6034a8cfd58fc7c213495409237644.jpg" >   
          </a>
          <!--<div class="readnum"><span class="tit">閱讀數(shù)</span><span class="num" data-read="16913">16913</span></div>-->               
          <!---------- 圖片下方的解釋文字，由js控制 哪張圖對(duì)應(yīng)哪個(gè)鏈接 ------->
          <div class="box">
           <i class="mark"></i>
           <a href="http://mbcaijing.baijia.baidu.com/article/755645" target="_blank" class="title">李嘉誠400億澳洲并購：千億現(xiàn)金急尋出路</a>
           <a href="http://mbcaijing.baijia.baidu.com/article/755645" target="_blank" class="title" >美女</a>
           <a href="http://mbcaijing.baijia.baidu.com/article/755645" target="_blank" class="title" >自行車</a>
           <a href="http://mbcaijing.baijia.baidu.com/article/755645" target="_blank" class="title" >足球</a>
          </div>
        </div>
        <!---------- 右下方四個(gè)點(diǎn) ------->
        <div class="circles">
        <a href="http://guoshiliangbo.baijia.baidu.com/article/756806" class="circle" target="_blank" ></a>
        <a href="http://yemacaijing.baijia.baidu.com/article/755797" class="circle" target="_blank"></a>
        <a href="http://mbcaijing.baijia.baidu.com/article/755645" class="circle " target="_blank"></a>
        <a href="http://junstapo.baijia.baidu.com/article/755717" class="circle " target="_blank" ></a>
        </div>
       </div>
       <!--------- 右擊箭頭--------->
       <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" id="widget_content_player_next" class="next carousel-btn-next">
        <span class="icon-wrap"><img src="image/右箭頭.png"</span>
       </a>
      <!-- </div>-->
     </div>

CSS

.ShowEntry{
 height:inherit;
 width:70%;
 background:#00F;
 margin-right:10px;
 float:left;
 position:relative;
}
.ShowEntry .carousel-btn-prev, .ShowEntry .carousel-btn-next {
 position: absolute;
 top: 130px;
 width: 50px;
 height: 50px;
 z-index: 89; 
}
.addBgi{
 background-image:url(../image/%E5%9C%86.png);
 background-repeat: no-repeat;
}
.ShowEntry .carousel-btn-prev {
 left: 15px;
 background-position: -10px -95px\9;
 /*background-image:url(../image/%E5%B7%A6%E7%AE%AD%E5%A4%B4.png)*/
}
.ShowEntry .carousel-btn-next {
 right: 15px;
 background-position: -160px -95px\9;
}
.ShowEntry .icon-wrap {
 position: relative;
 display: block;
 margin: 10% 0 0 10%;
 width: 80%;
 height: 80%;
/* z-index:99;*/
}
.player {
 position: relative;
}
.player .imgview {
 /*width: 670px;*/
 height: 300px;
 position: relative;
 overflow: hidden;
 background: #ccc;
}
.circles{
 position: absolute;
 bottom: 20px;
 right: 0;
 width: 80px;
 height: 8px;
}
/*.player .circles .active*/
.active {
 background: red;
 opacity: 1;/*????????*/
}
.player .circles .circle {
 width: 8px;
 height: 8px;
 border-radius: 50%;
 display: inline-block;
 background:#000;
 margin-left: 2px;
 opacity: .7;
}
.box{
 height:80px;
 width:100%;
 position:absolute;
 bottom:0;
}
.box .title {
 font-size: 18px;
 line-height: 70px;
 color: #fff;
 font-family: "??????","Hiragino Sans GB";
 display: block;
 text-align:center;
}
.box .title:hover {
 text-decoration: none;
 color: #e05a5a;
}

javascript

var index=0;
//周期：2秒 auto_play后不能加括號(hào)
var circulate=setInterval(auto_play,2000);//函數(shù)后面不能加括號(hào)
//自動(dòng)播放
function auto_play(){
 //alert(index);
 if(index>=3)
 {index=0;}
 else {index=index+1;}
 changePic(index);
 /*$(".imgview img").css("display","none");*/
 //$(".imgview img").attr("src",imgs[index]);
 //alert(index);
}
//切換圖片
 function changePic(index){
  //alert(index);
  $(".imgview a").css("display","none");
  $(".box a").css("display","none");
  $(".circles a").css("background","#000");
  //var src=$(".imgview a:eq("+index+")").attr("target");
  //alert(src);
  $(".imgview a:eq("+index+")").css("display","inline");
  $(".box a:eq("+index+")").css("display","block");
  $(".circles a:eq("+index+")").css("background","red");
  //alert(src);
 }
//鼠標(biāo)進(jìn)入播放區(qū)域 暫停播放
 $(".imgview").mouseenter(function(){
  //alert("hi!");
  clearInterval(circulate);
 })
 //鼠標(biāo)移出播放區(qū)域 開始播放
 $(".imgview").mouseleave(function(){
  //alert("hi!");
  circulate=setInterval(auto_play,2000);
 })
 //鼠標(biāo)移入序號(hào)圓點(diǎn) 切換到序號(hào)所對(duì)應(yīng)圖
 $(".circle").mouseenter(function(){
  //如何確定當(dāng)前circle的序號(hào)？
  var num=$(this).index();
  //alert(num);
  clearInterval(circulate);
  changePic(num);
  circulate=setInterval(auto_play,2000);
 });
//點(diǎn)擊左邊箭頭 切換到上一張
 $(".carousel-btn-prev").click(function(){
  clearInterval(circulate);
  //alert(index);
  //1.現(xiàn)在處在第幾張 ：index;
  if(index==0)index=3;
  else index=index-1;
  changePic(index);
  circulate=setInterval(auto_play,2000);
 });
 //點(diǎn)擊右邊箭頭 切換到下一張
 $(".carousel-btn-next").click(function(){
  clearInterval(circulate);
  //alert(index);
  //1.現(xiàn)在處在第幾張 ：index;
  if(index==3)index=0;
  else index=index+1;
  changePic(index);
  circulate=setInterval(auto_play,2000);
 });

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