需要实现的效果
样式分析:
2个主要部分,头部的标题和导航部分,和主要的功能实现区域;
1.头部
<div id="header">
<h1>动漫视频</h1>
<span><</span>
<span>></span>
</div>
<div id="tips">
<span class="on"> </span>
<span> </span>
<span> </span>
</div>
2.功能区域
<div id="viewBox">
<ul id="contentBox">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
<li>11</li>
<li>12</li>
</ul>
</div>
添加样式
<style>
#header{
display: inline-block;
}
#header h1{
display: inline-block;
font-size: 32px;
padding-left: 20px;
}
#header span{
width: 30px;
height: 30px;
display: inline-block;
font-size: 23px;
cursor:pointer;
border: 1px solid #eee;
border-radius: 3px;
text-align: center;
}
#header span:hover{
background: #333;
color: #fff;
}
#viewBox{
width: 960px;
height: 140px;
font-size: 0;
overflow: hidden;
border: 1px solid #333;
}
#contentBox{
width: 2880px;
position: relative;
}
#contentBox>li{
width: 200px;
height: 100px;
background: pink;
display: inline-block;
font-size: 12px;
margin: 20px;
}
#tips{
display: inline-block;
}
#tips span{
display: inline-block;
width: 20px;
height: 20px;
border-radius: 20px;
text-align: center;
line-height: 20px;
border: 1px solid #eee;
cursor: pointer;
}
#tips span:hover{
background: #999;
color: white;
}
#tips span.on{
background: black;
color: white;
}
</style>
此处需要注意,因为需要给 contentBox 添加 animate left 方法,所以需要给它的 position : related 才能使 animate left 生效
功能分析:
1.下一页
2.当下一页滚动到最后一页面,再点击下一页的时候,需要返回到第一页
3.上一页
4.当上一页滚动到第一页,再点击上一页的时候,需要前进到最后一页
5.当点击圆圈的时候,前进到任意一页
功能实现
首先,我们在接下来的功能中常用的一些元素,先赋值给变量
$vBox = $(‘#viewBox‘); /* 可以见到的展示区域 */
$cBox = $(‘#contentBox‘); /* 内容区域 */
vWidth = $vBox.width(); /* 可见区域的宽度 */
cWidth = $cBox.width(); /* 内容区域的宽度 */
然后,我们有5个小功能,下一页(goNext),回到顶部(goTop),上一页(goBack),回到底部(goBotoom),到任意页(goPage)
1.下一页(goNext)
var vLeft=$cBox.position().left; //内容区域距左侧的距离
$cBox.animate({left: ‘-=‘+vWidth+‘px‘});
2.回到顶部(goTop)
var vLeft=$cBox.position().left;
$cBox.animate({left: 0});
3.上一页(goBack)
var vLeft=$cBox.position().left; //内容区域距左侧的距离
$cBox.animate({left: ‘+=‘+vWidth+‘px‘});
4.回到底部(goBotoom)
var vLeft=$cBox.position().left; //内容区域距左侧的距离
$cBox.animate({left: -cWidth+vWidth});
5.到任意页(goPage)
var vLeft=$cBox.position().left; //内容区域距左侧的距离
$cBox.animate({left: -vWidth*page}); //传递一个page参数用来知道需要跳转到第几页
当每个小功能实现后,组合下功能,并绑定功能
var $vBox;
var $cBox;
var vWidth;
var cWidth;
$(function () {
$vBox = $(‘#viewBox‘);
$cBox = $(‘#contentBox‘);
vWidth = $vBox.width();
cWidth = $cBox.width();
$(‘#header span:last-child‘).click(function () {
go(‘next‘);
})
$(‘#header span:nth-child(2)‘).click(function () {
go(‘back‘);
})
$(‘#tips>span‘).click(function () {
var $ThisS=$(this);
$ThisS.addClass(‘on‘).siblings().removeClass();
go($ThisS.index());
})
})
function go(page) {
var vLeft=$cBox.position().left;
if (!$cBox.is(‘:animated‘)){
switch (page){
case ‘next‘:
if( vLeft > -cWidth-vLeft ){
$cBox.animate({left: ‘-=‘+vWidth+‘px‘});
}else{
go(‘top‘);
}
break;
case ‘back‘:
if( vLeft < 0){
$cBox.animate({left: ‘+=‘+vWidth+‘px‘});
}else{
go(‘bottom‘);
}
break;
case ‘top‘:
$cBox.animate({left: 0});
break;
case ‘bottom‘:
$cBox.animate({left: -cWidth+vWidth});
break;
default:
$cBox.animate({left: -vWidth*page});
break;
}
}
}
下面是全部代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>第一个页面</title>
<!--<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">-->
<script src="common/js/jquery-2.1.1.min.js"></script>
<!--<script src="common/js/screenAdaptation.js"></script>-->
<script src="js/download.js"></script>
<script src="js/stopXBack.js"></script>
<link rel="stylesheet" href="common/css/common-style.css?v=<%=Math.random()*100 %>">
<link rel="stylesheet" href="css/download.css?v=<%=Math.random()*100 %>">
<style>
#header{
display: inline-block;
}
#header h1{
display: inline-block;
font-size: 32px;
padding-left: 20px;
}
#header span{
width: 30px;
height: 30px;
display: inline-block;
font-size: 23px;
cursor:pointer;
border: 1px solid #eee;
border-radius: 3px;
text-align: center;
}
#header span:hover{
background: #333;
color: #fff;
}
#viewBox{
width: 960px;
height: 140px;
font-size: 0;
overflow: hidden;
border: 1px solid #333;
}
#contentBox{
width: 2880px;
position: relative;
}
#contentBox>li{
width: 200px;
height: 100px;
background: pink;
display: inline-block;
font-size: 12px;
margin: 20px;
}
#tips{
display: inline-block;
}
#tips span{
display: inline-block;
width: 20px;
height: 20px;
border-radius: 20px;
text-align: center;
line-height: 20px;
border: 1px solid #eee;
cursor: pointer;
}
#tips span:hover{
background: #999;
color: white;
}
#tips span.on{
background: black;
color: white;
}
</style>
<script>
var $vBox;
var $cBox;
var vWidth;
var cWidth;
$(function () {
$vBox = $(‘#viewBox‘);
$cBox = $(‘#contentBox‘);
vWidth = $vBox.width();
cWidth = $cBox.width();
$(‘#header span:last-child‘).click(function () {
go(‘next‘);
})
$(‘#header span:nth-child(2)‘).click(function () {
go(‘back‘);
})
$(‘#tips>span‘).click(function () {
var $ThisS=$(this);
$ThisS.addClass(‘on‘).siblings().removeClass();
go($ThisS.index());
})
})
function go(page) {
var vLeft=$cBox.position().left;
if (!$cBox.is(‘:animated‘)){
switch (page){
case ‘next‘:
if( vLeft > -cWidth-vLeft ){
$cBox.animate({left: ‘-=‘+vWidth+‘px‘});
}else{
go(‘top‘);
}
break;
case ‘back‘:
if( vLeft < 0){
$cBox.animate({left: ‘+=‘+vWidth+‘px‘});
}else{
go(‘bottom‘);
}
break;
case ‘top‘:
$cBox.animate({left: 0});
break;
case ‘bottom‘:
$cBox.animate({left: -cWidth+vWidth});
break;
default:
$cBox.animate({left: -vWidth*page});
break;
}
}
}
</script>
</head>
<body>
<div id="header">
<h1>动漫视频</h1>
<span><</span>
<span>></span>
</div>
<div id="tips">
<span class="on"> </span>
<span> </span>
<span> </span>
</div>
<div id="viewBox">
<ul id="contentBox">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
<li>11</li>
<li>12</li>
</ul>
</div>
</body>
</html>