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javascript - jQuery slider 不会开始

转载 作者:太空狗 更新时间:2023-10-29 13:29:09 30 4
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我正在开发一个 jQuery 小部件以添加到我的投资组合/知识库中。该小部件可以正常工作,并循环显示 5 张幻灯片,但是,它不会像应该的那样循环回到第 1 张幻灯片。它只会前进到一张空白幻灯片,页面需要刷新才能再次向后或向前移动。我是 Javascript/jQuery 初学者,所以我确定我遗漏了一些简单的东西,但我终生无法弄清楚。非常感谢任何帮助。

    //(document).ready(); makes sure that all elements on the page are
//loaded before loading the script
$(document).ready(function() {
//alert('Doc is loaded');

//specifies speed to change from image to image, in ms
var speed = 500;

//specifies auto slider option
var autoswitch = true;

//Autoslider speed
var autoswitch_speed = 4000;

//Add initial active class
$('.slide').first().addClass('active');

//Hide all slides
$('.slide').hide();

//Show first slide
$('.active').show();

$('#next').on('click', function() {
$('.active').removeClass('active').addClass('oldActive');
if ($('.oldactive').is('slider:last-child')) {
//alert('true');
$('.slide').first().addClass('active');
} else {
$('.oldActive').next().addClass('active');
}
$('.oldActive').removeClass('oldActive');
$('.slide').fadeOut(speed);
$('.active').fadeIn(speed);

});

$('#prev').on('click', function() {
$('.active').removeClass('active').addClass('oldActive');
if ($('.oldactive').is(':first-child')) {
$('.slide').last().addClass('active');
} else {
$('.oldActive').prev().addClass('active');
}
$('.oldActive').removeClass('oldActive');
$('.slide').fadeOut(speed);
$('.active').fadeIn(speed);

});
});
* {
margin: 0;
padding: 0;
}
body {
font-family: 'Arial', sans-serif;
font-size: 14px;
color: #fff;
background: #333;
line-height: 1.6em;
}
a {
color: #fff;
text-decoration: none;
}
h1 {
text-align: center;
margin-bottom: 20px;
}
#container {
width: 980px;
margin: 40px auto;
overflow: hidden;
}
#slider {
width: 940px;
height: 350px;
position: relative;
overflow: hidden;
float: left;
padding: 3px;
border: #666 solid 2px;
border-radius: 5px;
}
#slider img {
width: 940px;
height: 350px;
}
.slide {
position: absolute;
}
.slide-copy {
position: absolute;
bottom: 0;
left: 0;
padding: 20px;
background: 7f7f7f;
background: rgba(0, 0, 0, 0.5);
}
#prev,
#next {
float: left;
margin-top: 130px;
cursor: pointer;
position: relative;
z-index: 100;
}
#prev {
margin-right: -45px;
}
#next {
margin-left: -45px;
}
<!DOCTYPE html>
<html>

<head>
<title>jQuery Content Slider</title>
<link rel="stylesheet" href="css/style.css">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="js/script.js"></script>
</head>

<body>
<div id="container">
<header>
<h1>jQuery Content Slider</h1>
</header>
<img src="img/arrow-left.png" alt="Prev" id="prev">
<div id="slider">
<div class="slide">
<div class="slide-copy">
<h2>Slider One</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="img/slide1.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Two</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="img/slide2.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Three</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="img/slide3.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Four</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="img/slide4.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Five</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="img/slide5.jpg">
</div>
</div>
<img src="img/arrow-right.png" alt="Next" id="next">
</div>
</body>

</html>

最佳答案

var cur = 0,    // Start Slide Index. We'll use ++cur to increment index
pau = 2000, // Pause Time (ms)
fad = 500, // Fade Time (ms)
$ga = $('#slider'), // Cache Gallery Element
$sl = $('> div', $ga), // Cache Slides Elements
tot = $sl.length, // We'll use cur%tot to reset to first slide
itv ; // Used to clear on mouseenter

$sl.hide().eq( cur ).show(); // Hide all Slides but desired one

function stopFn() { clearInterval(itv); }
function loopFn() { itv = setInterval(fadeFn, pau); }
function fadeFn() { $sl.fadeOut(fad).eq(++cur%tot).stop().fadeIn(fad); }
$ga.hover( stopFn, loopFn );

loopFn(); // Finally, Start

在脚本中添加这段代码。这将启用循环效果。尝试使用您的代码,但对我来说有点复杂。试试这个方法,它会非常有效。

参见 DEMO

查看代码片段

//(document).ready(); makes sure that all elements on the page are
//loaded before loading the script
$(document).ready(function() {
//alert('Doc is loaded');

//specifies speed to change from image to image, in ms
var speed = 1000;

//specifies auto slider option
var autoswitch = true;

//Autoslider speed
var autoswitch_speed = 4000;

//Add initial active class
$('.slide').first().addClass('active');

//Hide all slides
$('.slide').hide();

//Show first slide
$('.active').show();

$('#next').on('click', function() {
$('.active').removeClass('active').addClass('oldActive');
if ($('.oldactive').is('slider:last-child')) {
//alert('true');
$('.slide').first().addClass('active');
} else {
$('.oldActive').next().addClass('active');
}
$('.oldActive').removeClass('oldActive');
$('.slide').fadeOut(speed);
$('.active').fadeIn(speed);

});

$('#prev').on('click', function() {
$('.active').removeClass('active').addClass('oldActive');
if ($('.oldactive').is(':first-child')) {
$('.slide').last().addClass('active');
} else {
$('.oldActive').prev().addClass('active');
}
$('.oldActive').removeClass('oldActive');
$('.slide').fadeOut(speed);
$('.active').fadeIn(speed);

});
});


var cur = 0, // Start Slide Index. We'll use ++cur to increment index
pau = 1000, // Pause Time (ms)
fad = 500, // Fade Time (ms)
$ga = $('#slider'), // Cache Gallery Element
$sl = $('> div', $ga), // Cache Slides Elements
tot = $sl.length, // We'll use cur%tot to reset to first slide
itv; // Used to clear on mouseenter

$sl.hide().eq(cur).show(); // Hide all Slides but desired one

function stopFn() {
clearInterval(itv);
}

function loopFn() {
itv = setInterval(fadeFn, pau);
}

function fadeFn() {
$sl.fadeOut(fad).eq(++cur % tot).stop().fadeIn(fad);
}
$ga.hover(stopFn, loopFn);

loopFn(); // Finally, Start
* {
margin: 0;
padding: 0;
}
body {
font-family: 'Arial', sans-serif;
font-size: 14px;
color: #fff;
background: #333;
line-height: 1.6em;
}
a {
color: #fff;
text-decoration: none;
}
h1 {
text-align: center;
margin-bottom: 20px;
}
#container {
width: 980px;
margin: 40px auto;
overflow: hidden;
}
#slider {
width: 500px;
height: 300px;
position: relative;
overflow: hidden;
float: left;
padding: 3px;
border: #666 solid 2px;
border-radius: 5px;
}
#slider img {
width: 500px;
height: 300px;
}
.slide {
position: absolute;
}
.slide-copy {
position: absolute;
bottom: 0;
left: 0;
padding: 20px;
background: 7f7f7f;
background: rgba(0, 0, 0, 0.5);
}
#prev,
#next {
float: left;
margin-top: 130px;
cursor: pointer;
position: relative;
z-index: 100;
}
#prev {
margin-right: -45px;
}
#next {
margin-left: -45px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>

<body>
<div id="container">
<header>
<h1>jQuery Content Slider</h1>
</header>
<img src="http://leedspromoproducts.com/templates//img/thumbnails_prev_button.png" alt="Prev" id="prev">
<div id="slider">
<div class="slide">
<div class="slide-copy">
<h2>Slider One</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="http://www.vectordiary.com/isd_premium/048-hot-air-balloon/hot-air-balloon.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Two</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="http://www.moneyindices.com/admin/upload/50193693.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Three</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="http://images.china.cn/attachement/jpg/site1007/20110808/000cf1a48f870fa9c75c55.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Four</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="http://cdn.allsteamboat.com/images/content/5418_gBVhd_Hot_Air_Balloon_Rodeo_in_Steamboat_Springs_md.jpg">
</div>

<div class="slide">
<div class="slide-copy">
<h2>Slider Five</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed vitae commodo sem. Integer eros nibh, molestie congue elementum quis, mattis nec tortor. Vivamus sed hendrerit sed vitae orci convallis.</p>
</div>
<img src="http://www.moneyindices.com/admin/upload/50193693.jpg">
</div>
</div>
<img src="http://thehaircraftersco.com/wp-content/uploads/2015/10/next-button.png" alt="Next" id="next">
</div>
</body>

关于javascript - jQuery slider 不会开始,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34461083/

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