最终实现效果图
代码块
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>左右箭头轮播</title>
<link rel="stylesheet" href="css/index.css">
<script src="jq/jquery-1.7.2.js"></script>
<script src="jq/index.js"></script>
</head>
<body>
<div class="box" id="box">
<ul class="big_img" id="big_img">
<li><a href=""><img src="image/1.jpg"></a></li>
<li><a href=""><img src="image/2.jpg"></a></li>
<li><a href=""><img src="image/3.jpg"></a></li>
<li><a href=""><img src="image/4.jpg"></a></li>
</ul>
<div class="btn btn_left"><</div>
<div class="btn btn_right">></div>
</div>
</body>
</html>
css
*{margin: 0;padding: 0}
ul{list-style: none}
img{
vertical-align: top;
}
.box{
position: absolute;
width: 960px;
height: 600px;
margin-left: 200px;
margin-top: 100px;
}
.big_img{
width: 960px;
height: 600px;
overflow: hidden;
position: relative;
}
.big_img ul{
position: absolute;
top: 0;
left: 0;
}
.big_img li{
float: left;
}
.btn{
display: none;
width: 50px;
height: 60px;
background: rgba(0,0,0,0.30);
line-height: 60px;
text-align: center;
color: lightgray;
font-size: 50px;
cursor: pointer;
}
.btn_left{
position: absolute;
left: 0px;
top: 50%;
margin-top: -30px;
}
.btn_right{
position: absolute;
right: 0px;
top: 50%;
margin-top: -30px;
}
js
var loopIndex = 0;
var direct = 0;
$(function () {
autoLoop();
$(".btn_right").click(function () {
direct = 0;
autoLoop();
});
$(".btn_left").click(function () {
direct = 1;
autoLoop();
});
$("#box").hover(function () {
//当鼠标移入图片时显示箭头
$("#box .btn").show();
},function () {
//当鼠标移出时隐藏箭头
$("#box .btn").hide();
});
});
function autoLoop() {
//当前被点击的图片索引显示，其它的隐藏
$("#big_img li").eq(loopIndex).fadeIn(1000).siblings("li").hide();
if (direct == 0){
loopIndex++;
//当loopIndex等于图片的长度的时候，依次向右递增
if (loopIndex == $("#big_img li").length){
loopIndex = 0;
}
}else {
loopIndex--;
if (loopIndex == -1){
loopIndex = $("#big_img li").length - 1;
}
}
}