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這篇文章給大家介紹使用jQuery怎么實現一個淡入淡出圖片輪播效果，內容非常詳細，感興趣的小伙伴們可以參考借鑒，希望對大家能有所幫助。
jquery是一個簡潔而快速的JavaScript庫，它具有獨特的鏈式語法和短小清晰的多功能接口、高效靈活的css選擇器，并且可對CSS選擇器進行擴展、擁有便捷的插件擴展機制和豐富的插件，是繼Prototype之后又一個優秀的JavaScript代碼庫，能夠用于簡化事件處理、HTML文檔遍歷、Ajax交互和動畫，以便快速開發網站。
1.HTML 框架搭建（css代碼里寬高的大小與圖片的大小一致）
css部分：
<style>
* {
padding: 0;
margin:0;
}
ul {
list-style: none;
}
.out {
width: 640px;
height: 270px;
margin:50px auto;
position: relative;
}
.out img{
width: 640px;
height: 270px;
}
.out .img li {
position: absolute;
left:0;
top:0;
display: none;
}
.out .num {
position: absolute;
bottom: 20px;
left: 0;
font-size:0px;
text-align:center;
width: 100%;
}
.out .num li {
width: 20px;
height: 20px;
line-height:20px;
border-radius:50%;
background:#666;
color: #fff;
text-align:center;
display: inline-block;
font-size:16px;
margin:0 3px;
cursor: pointer;
}
.out .num li.active {
background:#a00;
}
.out .btn {
position:absolute;
top: 50%;
margin-top:-30px;
width: 30px;
height: 60px;
line-height:60px;
background:rgba(0, 0, 0, 0.5);
font-size:40px;
color: #fff;
text-align:center;
display: none;
}
.out .left {
left: 0;
}
.out .right {
right: 0;
}
.out:hover .btn {
display: block;
cursor: pointer;
}
</style>HTML部分：
<body> <div class="out "> <ul class="img "> <li> <a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="image/1.jpg " alt=" "> </a> </li> <li> <a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="image/2.jpg " alt=" "> </a> </li> <li> <a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="image/3.jpg " alt=" "> </a> </li> <li> <a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="image/4.jpg " alt=" "> </a> </li> <li> <a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="image/5.jpg " alt=" "> </a> </li> </ul> <ul class="num "> </ul> <div class="left btn "> <</div> <div class="right btn ">></div> </div> </body>
juery代碼實現圖片的自動輪播和 手動輪播效果
<script type="text/javascript" src="JS/jquery.js"></script>
<script type="text/javascript">
$(function() {
//代碼初始化
var size=$(".img li").size();
for (var i = 1; i <= size; i++) {
var li="<li>"+i+"</li>";
$(".num").append(li);
};
//手動控制輪播效果
$(".img li").eq(0).show();
$(".num li").eq(0).addClass("active");
$(".num li").mouseover(function() {
$(this).addClass("active").siblings().removeClass("active");
var index = $(this).index();
i=index;
$(".img li").eq(index).fadeIn(300).siblings().fadeOut(300);
})
//自動
var i = 0;
var t = setInterval(move, 1500);
//核心向左的函數
function moveLeft() {
i--;
if (i == -1) {
i = size-1;
}
$(".num li").eq(i).addClass("active").siblings().removeClass("active");
$(".img li").eq(i).fadeIn(300).siblings().fadeOut(300);
}
//核心向右的函數
function move() {
i++;
if (i == size) {
i = 0;
}
$(".num li").eq(i).addClass("active").siblings().removeClass("active");
$(".img li").eq(i).fadeIn(300).siblings().fadeOut(300);
}
//定時器的開始與結束
$(".out").hover(function() {
clearInterval(t);
}, function() {
t = setInterval(move, 1500)
})
//左邊按鈕的點擊事件
$(".out .left").click(function() {
moveLeft();
})
//右邊按鈕的點擊事件
$(".out .right").click(function() {
move();
})
})
</script>這里使用本站演示圖片，構建完整代碼如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>www.jb51.net jQuery淡入淡出輪播圖</title>
<style>
* {
padding: 0;
margin:0;
}
ul {
list-style: none;
}
.out {
width: 640px;
height: 270px;
margin:50px auto;
position: relative;
}
.out .img li {
position: absolute;
left:0;
top:0;
display: none;
}
.out .num {
position: absolute;
bottom: 20px;
left: 0;
font-size:0px;
text-align:center;
width: 100%;
}
.out .num li {
width: 20px;
height: 20px;
line-height:20px;
border-radius:50%;
background:#666;
color: #fff;
text-align:center;
display: inline-block;
font-size:16px;
margin:0 3px;
cursor: pointer;
}
.out .num li.active {
background:#a00;
}
.out .btn {
position:absolute;
top: 50%;
margin-top:-30px;
width: 30px;
height: 60px;
line-height:60px;
background:rgba(0, 0, 0, 0.5);
font-size:40px;
color: #fff;
text-align:center;
display: none;
}
.out .left {
left: 0;
}
.out .right {
right: 0;
}
.out:hover .btn {
display: block;
cursor: pointer;
}
</style>
</head>
<body>
<div class="out ">
<ul class="img ">
<li>
<a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<img src="http://demo.jb51.net/js/2018/html5-css3-3d-img-flash-codes/images/Guardians-of-the-Galaxy-Poster-High-Res.jpg" alt=" ">
</a>
</li>
<li>
<a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<img src="http://demo.jb51.net/js/2018/html5-css3-3d-img-flash-codes/images/Blade-Runner-poster-art-Harrison-Ford.jpg" alt=" ">
</a>
</li>
<li>
<a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<img src="http://demo.jb51.net/js/2018/html5-css3-3d-img-flash-codes/images/2017_alien_covenant_4k-5120x2880-1920x1080.jpg" alt=" ">
</a>
</li>
<li>
<a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<img src="http://demo.jb51.net/js/2018/html5-css3-3d-img-flash-codes/images/robocop-1987-wallpaper-2.jpg" alt=" ">
</a>
</li>
<li>
<a href="# " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<img src="http://demo.jb51.net/js/2018/html5-css3-3d-img-flash-codes/images/sJALsDXak4EehSg2F2y92rt5hPe.jpg" alt=" ">
</a>
</li>
</ul>
<ul class="num ">
</ul>
<div class="left btn ">
<</div>
<div class="right btn ">></div>
</div>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
//代碼初始化
var size=$(".img li").size();
for (var i = 1; i <= size; i++) {
var li="<li>"+i+"</li>";
$(".num").append(li);
};
//手動控制輪播效果
$(".img li").eq(0).show();
$(".num li").eq(0).addClass("active");
$(".num li").mouseover(function() {
$(this).addClass("active").siblings().removeClass("active");
var index = $(this).index();
i=index;
$(".img li").eq(index).fadeIn(300).siblings().fadeOut(300);
})
//自動
var i = 0;
var t = setInterval(move, 1500);
//核心向左的函數
function moveLeft() {
i--;
if (i == -1) {
i = size-1;
}
$(".num li").eq(i).addClass("active").siblings().removeClass("active");
$(".img li").eq(i).fadeIn(300).siblings().fadeOut(300);
}
//核心向右的函數
function move() {
i++;
if (i == size) {
i = 0;
}
$(".num li").eq(i).addClass("active").siblings().removeClass("active");
$(".img li").eq(i).fadeIn(300).siblings().fadeOut(300);
}
//定時器的開始與結束
$(".out").hover(function() {
clearInterval(t);
}, function() {
t = setInterval(move, 1500)
})
//左邊按鈕的點擊事件
$(".out .left").click(function() {
moveLeft();
})
//右邊按鈕的點擊事件
$(".out .right").click(function() {
move();
})
})
</script>
</body>
</html>關于使用jQuery怎么實現一個淡入淡出圖片輪播效果就分享到這里了，希望以上內容可以對大家有一定的幫助，可以學到更多知識。如果覺得文章不錯，可以把它分享出去讓更多的人看到。
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