jquery实现焦点轮播效果
作者：ljz1490614196
本文主要介绍了jquery实现焦点轮播效果的示例代码，具有很好的参考价值，下面跟着小编一起来看下吧
HTML代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="./css/lunbo.css" rel="external nofollow" > </head> <body> <div id="banner"> <ul class="img-ul"></ul> <ol class="index-ol"></ol> <div class="slide"> <span class="prev"><</span> <span class="next">></span> </div> </div> <script src="./js/jquery-1.11.3.js"></script> <script src="./js/lunbo.js"></script> </body> </html>
css代码
div {
width: 670px;
height: 240px;
position: relative;
overflow: hidden;
}
div > ul,
div ol {
list-style: none;
position: absolute;
margin: 0;
padding: 0;
}
div > ul.img-ul,
div ol.img-ul {
width: 3350px;
height: 240px;
z-index: 100;
}
div > ul.img-ul > li,
div ol.img-ul > li {
float: left;
width: 670px;
height: 240px;
}
div > ul.index-ol,
div ol.index-ol {
width: 205px;
bottom: 10px;
left: 217px;
z-index: 1000;
}
div > ul.index-ol > li,
div ol.index-ol > li {
float: left;
cursor: pointer;
margin-left: 20px;
background: #000;
color: #fff;
border-radius: 50%;
height: 20px;
width: 20px;
text-align: center;
line-height: 20px;
}
div > ul.index-ol > li.active,
div ol.index-ol > li.active {
background: red;
}
div > div.slide {
z-index: 500;
position: absolute;
width: 670px;
height: 240px;
left: 0;
top: 0;
}
div > div.slide > span {
cursor: pointer;
position: absolute;
top: 100px;
width: 30px;
height: 60px;
line-height: 60px;
text-align: center;
font-size: 20px;
color: #fff;
background: rgba(0, 0, 0, 0.2);
}
div > div.slide > span:nth-child(1) {
left: 0;
}
div > div.slide > span:nth-child(2) {
right: 0;
}
JavaScript代码
var arr=[
{"img":"./images/banner_01.jpg"},
{"img":"./images/banner_02.jpg"},
{"img":"./images/banner_03.jpg"},
{"img":"./images/banner_04.jpg"},
{"img":"./images/banner_05.jpg"},
];
var lunbo={
can:0, //判断
ul_li:"",//图片列表
ol_li:"",//数字列表
width:"",//一个li的宽度
interval:"",//定时器
init:function(){
console.log(this);
this.view();
this.view_index();
$("ol.index-ol").children("li:eq(0)").addClass("active");
this.width=$("ul.img-ul>li").width(); //670
this.slide(); //这是左右箭头
this.animation_index();//这是下标
this.play(); //这是自动轮播
this.mouse(); //这是鼠标滑入/滑出
},
mouse:function(){
var _this=this;
$("#banner").on({
mouseenter:function(){
_this.stop()
},
mouseleave:function(){
_this.play();
}
})
},
play:function(){
this.interval=setInterval(function(){
var active_index= parseInt($("ol.index-ol>li.active").attr("data-index"));//得到当前激活向下标
$("ol.index-ol>li").removeClass("active");
$(this).addClass("active");
this.animation(1);
(active_index==4)&&(active_index=-1);
$("ol.index-ol>li:eq("+(active_index+1)+")").addClass("active")
}.bind(this),3000);
},
stop:function(){
clearInterval(this.interval)
this.interval=null;
},
animation_index:function(){//更新下标
var _this=this;
$("ol.index-ol>li").mouseenter(function(){//点击下标
var active_index= $("ol.index-ol>li.active").attr("data-index");//得到当前激活向下标
var index=$(this).attr("data-index");//得到当前下标;
if(active_index==index){return;};
$("ol.index-ol>li").removeClass("active");
$(this).addClass("active");
var end=index-active_index;
_this.animation(-end)
})
},
slide:function(){//点击左右箭头
var _this=this;
$("div.slide>span").click(function(){
if(_this.can){return;};
var active_index= parseInt($("ol.index-ol>li.active").attr("data-index"));//得到当前激活向下标
$("ol.index-ol>li").removeClass("active");
if(this.className=="prev"){
_this.animation(1);
(active_index==1)&&(active_index=5);
$("ol.index-ol>li:eq("+(active_index-1)+")").addClass("active")
}else{
_this.animation(-1);
(active_index==4)&&(active_index=-1);
$("ol.index-ol>li:eq("+(active_index+1)+")").addClass("active")
}
})
},
view:function(){//更新图片
for(var i=0;i<arr.length;i++){
this.ul_li+="<li data-index="+i+"><img src="+arr[i].img+"></li>"
}
$("ul.img-ul").html(this.ul_li);
this.ul_li="";
},
view_index:function(){//更新数字
for(var i=0;i<arr.length;i++){
this.ol_li+="<li data-index="+i+">"+(i+1)+"</li>"
}
$("ol.index-ol").html(this.ol_li);
},
animation:function(n){//做动画
this.can=1;
if(n<0){
arr=arr.splice(arr.length+n,-n).concat(arr);
this.view();
$("ul.img-ul").css({"left":n*this.width+"px"});
$("ul.img-ul").animate({"left":"0px"},1000,function(){
this.can=0;
}.bind(this));
}else{
$("ul.img-ul").animate({"left":-n*this.width+"px"},1000,function(){
arr=arr.concat(arr.splice(0,n));
this.view();
$("ul.img-ul").css({"left":0+"px"});
this.can=0;
}.bind(this));
}
}
};
lunbo.init();
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持脚本之家！