我正在使用一些 jQuery 来实现轮播图片 slider ，它有两个按钮:下一张图片和上一张图片。我如何向两个按钮添加鼠标单击事件监听器，以便在单击任一按钮时在 slider 下方打印相应的文本，从而生成图片幻灯片，其中每张图片都与一些文本相关联？任何见解将不胜感激。
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<script>
jQuery(document).ready(function ($) {
$('#checkbox').change(function(){
setInterval(function () {
moveRight();
}, 3000);
});
var slideCount = $('#slider ul li').length;
var slideWidth = $('#slider ul li').width();
var slideHeight = $('#slider ul li').height();
var sliderUlWidth = slideCount * slideWidth;
$('#slider').css({ width: slideWidth, height: slideHeight });
$('#slider ul').css({ width: sliderUlWidth, marginLeft: - slideWidth });
$('#slider ul li:last-child').prependTo('#slider ul');
function moveLeft() {
$('#slider ul').animate({
left: + slideWidth
}, 200, function () {
$('#slider ul li:last-child').prependTo('#slider ul');
$('#slider ul').css('left', '');
});
};
function moveRight() {
$('#slider ul').animate({
left: - slideWidth
}, 200, function () {
$('#slider ul li:first-child').appendTo('#slider ul');
$('#slider ul').css('left', '');
});
};
$('button.control_prev').click(function () {
moveLeft();
});
$('button.control_next').click(function () {
moveRight();
});
});
</script>
<style>
@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300,600);
nav {
float: left;
background-color: #EEEFFF;
height: 1500px;
width: 100px;
}
html {
border-top: 5px solid #fff;
background: #58DDAF;
color: #2a2a2a;
}
html, body {
margin: 0;
padding: 0;
font-family: 'Open Sans';
}
h1 {
color: #fff;
text-align: center;
font-weight: 300;
}
#slider {
position: relative;
overflow: hidden;
margin: 20px auto 0 auto;
border-radius: 4px;
}
#slider ul {
position: relative;
margin: 0;
padding: 0;
height: 200px;
list-style: none;
}
#slider ul li {
position: relative;
display: block;
float: left;
margin: 0;
padding: 0;
width: 500px;
height: 300px;
background: #ccc;
text-align: center;
line-height: 300px;
}
button.control_prev, button.control_next {
position: absolute;
top: 40%;
z-index: 999;
display: block;
padding: 4% 3%;
width: auto;
height: auto;
background: #2a2a2a;
color: #fff;
text-decoration: none;
font-weight: 600;
font-size: 18px;
opacity: 0.8;
cursor: pointer;
border:solid transparent;
}
button.control_prev:hover, button.control_next:hover {
opacity: 1;
-webkit-transition: all 0.2s ease;
}
button.control_prev {
border-radius: 0 2px 2px 0;
}
button.control_next {
right: 0;
border-radius: 2px 0 0 2px;
}
.slider_option {
position: relative;
margin: 10px auto;
width: 160px;
font-size: 18px;
}
</style>
</head>
<body>
<nav>
test
</nav>
<div id="slider">
<button class="control_next"></button>
<button class="control_prev"></button>
<ul>
<li>SLIDE 1</li>
<li style="background: #aaa;">SLIDE 2</li>
<li>SLIDE 3</li>
<li style="background: #aaa;">SLIDE 4</li>
</ul>
</div>
</body>
</html>
最佳答案
我对您的以下 2 个函数做了细微的更改:
function moveLeft() {
$('#slider ul').animate({
left: + slideWidth
}, 200, function () {
$('#slider ul li:last-child').prependTo('#slider ul');
$('#slider ul').css('left', '');
});
var current=$("li.active"); //get the current active li
var prev=current.prev('li'); //get its prev li
current.removeClass('active'); //remove active from current li
if(prev.length==0) //if no previous element is present
$('li:last').addClass('active'); //make last li as active
else
prev.addClass('active'); //make prev li active
var cur=$('li.active').attr('data-des'); once active is set to prev or next li get its data-des attribute
$('.imageDes').fadeOut('500').text(cur).fadeIn('500'); //set it to a div
};
function moveRight() {
$('#slider ul').animate({
left: - slideWidth
}, 200, function () {
$('#slider ul li:first-child').appendTo('#slider ul');
$('#slider ul').css('left', '');
});
var current=$("li.active");
var next=current.next('li');
current.removeClass('active');
if(next.length==0)
$('li:first').addClass('active');
else
next.addClass('active');
var cur=$('li.active').attr('data-des');
$('.imageDes').fadeOut('500').text(cur).fadeIn('500');
};
请参阅 moveLeft() 的行注释，它与 moveRight() 相同。
你的 html:
<div class="imageDes">Image 1</div><!--this is where you display your corresponding text-->
<button class="control_next"></button>
<button class="control_prev"></button>
<ul>
<!--Added extra attribute to each li with name data-des-->
<li class="active" data-des="Image 1">SLIDE 1</li>
<li data-des="Image 2" style="background: #aaa;">SLIDE 2</li>
<li data-des="Image 3">SLIDE 3</li>
<li data-des="Image 4" style="background: #aaa;">SLIDE 4</li>
</ul>
关于jquery - 向 jQuery 代码添加事件监听器，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31577913/