jesonhu / seamless-scroll Goto Github PK
View Code? Open in Web Editor NEW无缝轮播各种实现方式
无缝轮播各种实现方式
html
<!DOCTYPE HTML>
<html>
<head>
<title>无缝滚动轮播</title>
<meta charset="utf-8">
<meta name="Author" content="Jesonhu">
<style type='text/css'>
*{ margin:0; padding:0;}
#banner{
position:relative;
width:520px;
height:280px;
margin:20px auto;
border:1px solid red;
}
#banner .pic{
overflow:hidden;
width:100%;
height:100%;
}
li{
list-style:none;
}
#banner .pic ul{
overflow:hidden;
width:1000%;
margin-left:-520px;
}
#banner .pic ul li{
float:left;
}
#banner .tab{
position:absolute;
bottom:10px;
left:50%;
width:70px;
height:14px;
margin-left:-35px;
border-radius:7px;
background:rgba(255,255,255,0.5);
}
#banner .tab ul li{
float:left;
width:10px;
height:10px;
margin:2px 2px;
border-radius:100%;
cursor:pointer;
background:#999;
}
#banner .tab ul li.on{
background:#f60;
}
#banner .btn{
display:none;
}
#banner .btn div{
position:absolute;
top:50%;
width:40px;
height:40px;
margin-top:-20px;
color:#fff;
font-size:26px;
font-weight:bold;
text-align:center;
line-height:40px;
cursor:pointer;
background:rgba(0,0,0,0.3);
}
#leftBtn{
left:5px;
}
#rightBtn{
right:5px;
}
#banner .btn div.hover{
background:rgba(0,0,0,0.6);
}
</style>
</head>
<body>
<div id="banner">
<div class="pic">
<ul>
<li><a href=""><img src="img/5.jpg" /></a></li>
<li><a href=""><img src="img/1.jpg" /></a></li>
<li><a href=""><img src="img/2.jpg" /></a></li>
<li><a href=""><img src="img/3.jpg" /></a></li>
<li><a href=""><img src="img/4.jpg" /></a></li>
<li><a href=""><img src="img/5.jpg" /></a></li>
<li><a href=""><img src="img/1.jpg" /></a></li>
</ul>
</div>
<div class="tab">
<ul>
<li class="on"></li><li></li><li></li><li></li><li></li>
</ul>
</div>
<div class="btn">
<div id="leftBtn"><</div>
<div id="rightBtn">></div>
</div>
</div>
<script type="text/javascript" src="js/jquery-1.12.1.min.js"></script>
<script src="./js/mScroll.js"></script>
</body>
</html>
js
/**
* 点击无缝轮播效果实现
* @auther Jesonhu
* @update 20180405
* @desc 功能:
* 1.无缝滚动
* 2.点击频率限制
*/
;
(function ($) {
$(function () {
const $banner = $('#banner');
const $imgUl = $('#banner .pic ul');
const $imgLi = $('#banner .pic li');
const imgWidth = $imgLi.width();
const $tabLi = $('#banner .tab li');
const tabLiLength = $tabLi.length;
const $btnDiv = $('#banner .btn div');
const FAST_HANDLER_TIME = 350;
const DURATION = 3000;
let index = 0;
let prevHandlerTime = new Date();
let autoPlayTimer = null;
/**
* 显示下一张图片
*/
function showNextImg() {
index++;
$imgUl.animate({
marginLeft: -imgWidth * (index + 1) + 'px'
}, 300, function () {
if (index >= tabLiLength) {
index = 0;
$imgUl.css({
marginLeft: -imgWidth + 'px'
});
$tabLi.eq(index).addClass('on').siblings().removeClass('on');
}
});
$tabLi.eq(index).addClass('on').siblings().removeClass('on');
}
/**
* 轮播自动播放
*/
function autoPlay() {
autoPlayTimer = setInterval(() => {
showNextImg();
}, DURATION);
}
autoPlay();
/**
* tab点击切换
* @desc Tips: jQuery回调不能使用箭头函数, 如果使用箭头函数
* 内部this指向#document。
*/
$tabLi.on('click', function () {
index = $(this).index();
$tabLi.eq(index).addClass('on').siblings().removeClass('on');
// FIXME: 这里采用css3 transform体验性会更好
$imgUl.animate({
marginLeft: -imgWidth * (index + 1) + 'px'
}, 300);
});
/**
* 左右按钮点击
*/
$btnDiv.on('click', function (e) {
const clickIndex = $(this).index();
const nowHandlerTime = new Date();
if ((nowHandlerTime - prevHandlerTime) > FAST_HANDLER_TIME) {
prevHandlerTime = new Date();
// 点击了左按钮
if (clickIndex === 0) {
index--;
$imgUl.animate({
marginLeft: -imgWidth * (index + 1) + 'px'
}, 300, function () {
if (index < 0) {
index = tabLiLength - 1;
$imgUl.css({
marginLeft: -imgWidth * (index + 1) + 'px'
});
// methods2
// $imgUl.css({marginLeft: -imgWidth * tabLiLength + 'px'});
$tabLi.eq(index).addClass('on').siblings().removeClass('on');
}
});
} else {
showNextImg();
}
$tabLi.eq(index).addClass('on').siblings().removeClass('on');
}
});
/**
* 鼠标悬浮到轮播区域
*/
$banner.on('mouseenter', function () {
$btnDiv.parent().show();
clearInterval(autoPlayTimer);
});
/**
* 鼠标离开轮播区域
*/
$banner.on('mouseleave', function () {
$btnDiv.parent().hide();
autoPlay();
});
});
})(jQuery);
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