为啥幻灯片没有显示,求指教
来源：3-1 输出以及切换
慕娘5782655
2015-08-25 22:48
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>slide_preview</title>
<style type="text/css">
*{padding: 0;margin: 0;}
body{
padding: 50px 0;
background-color: #fff;
font-size:14px;
font-family:'Avenir Next';
color: #555;
-webkit-font-smoothing:antialiased;/*字体抗锯齿*/
}
.slider,.slider .main,.slider .main .main-i{
width: 100%;
height: 400px;
position: relative;
}
/*幻灯片区域*/
.slider .main{
overflow: hidden;/*隐藏溢出*/
}
/*每一个幻灯片样式*/
.slider .main .main-i{}
.slider .main .main-i img{
width: 100%;
position: absolute;
left: 0;
top: 50%;
/*z-index: 5;*/
}
.slider .main .main-i .caption{
position: absolute;
right: 50%;
top: 30%;
z-index: 9;/*控制叠加层次*/
}
.caption h2{
font-size: 40px;
line-height: 50px;
color: #b5b5b5;
text-align: right;
}
.caption h3{
font-size: 70px;
line-height: 70px;
color: #000;
text-align: right;
font-family: 'Open Sans Condensed';
}
/*控制按钮区域*/
.slider .ctrl{
width: 100%;
height: 13px;
line-height: 13px;
text-align: center;
position: absolute;
left: 0;
bottom: -13px;
/*background: #f00;*/
}
.slider .ctrl .ctrl-i{
display: inline-block;
width: 150px;
height: 13px;
background-color: #666;
box-shadow: 0 1px 1px rgba(0,0,0,.3);
position:relative;
margin-left: 1px;
}
.slider .ctrl .ctrl-i img{
width: 100%;
position: absolute;
left: 0;
bottom: 50px;
z-index: 1;
opacity: 0;
-webkit-transition:all .2s;
}
/*hover按钮样式*/
.slider .ctrl .ctrl-i:hover{
background-color: #f0f0f0;
}
.slider .ctrl .ctrl-i:hover img{
bottom: 13px;
opacity: 1;
/*倒影*/
-webkit-box-reflect:below 0px -webkit-gradient(
linear,
left top,
left bottom,
from(transparent),
color-stop( 50% , transparent ),
to( rgba( 255,255,255,0.3 ) )
);
/*-webkit-box-reflect:below 0px -webkit-gradient(
linear,线形渐变
left top,起始位置
left bottom,结束位置
from(transparent),开始颜色
color-stop( 50% , transparent ),中间颜色
to( rgba( 255,255,255,0.3 ))结束颜色;
);*/
}
/*button active*/
.slider .ctrl .ctrl-i_active:hover,.slider .ctrl .ctrl-i_active{
background: #000;
}
.slider .ctrl .ctrl-i_active:hover img{
opacity: 0;
}
/*幻灯片切换*/
.slider .main .main-i{
opacity: 0;
position: absolute;
right: 50%;
top: 0;
-webkit-transition:all .5s;
}
.slider .main .main-i h2{
margin-right: 45px;
}
.slider .main .main-i h3{
margin-right: -45px;
}
.slider .main .main-i h2,.slider .main .main-i h3{
-webkit-transition:all 1s .8s;
}
.slider .main .main-i_active{
opacity: 1;
right: 0;
}
.slider .main .main-i_active h2,.slider .main .main-i_active h3{
margin-right: 0;
opacity: 1;
/*-webkit-transition:all .8s 1s;*/
}
.caption{
margin-right: 13%;
}
</style>
</head>
<body>
<div>
<!-- 修改VIEW Template(关键字替换),增加 template id -->
<div id="template_main">
<div id="main_{{index}}">
<div>
<h2>{{h2}}</h2>
<h3>{{h3}}</h3>
</div>
<img src="img/{{index}}.jpg" />
</div>
</div>
<div id="template_ctrl">
<a id="ctrl_{{index}}" href="javascript:switchSlider({{index}});" ><img src="img/{{index}}.jpg" /></a>
</div>
<script type="text/javascript">
// 1. 数据定义(实际环境中由后台给出)
var data = [
{img:1,h1:'Creative',h2:'DUTE'},
{img:2,h1:'Friendly',h2:'DEVIL'},
{img:3,h1:'Tranquilent',h2:'VOMPATRIOT'},
{img:4,h1:'Insecure',h2:'HUSSLER'},
{img:5,h1:'Loving',h2:'REBEL'}
];
// 2. 通用函数
var g = function (id) {
if( id.substr(0,1) == '.'){
return document.getElementByClassName(id.substr(1));
}
return document.getElementById(id);
}
// 3. 添加幻灯片
function addSliders(){
// 3.1 获取模板
var tpl_main=g('template_main').innerHTML
.replace(/^\s*/,'')
.replace(/\s*$/,'');//去掉空白格
var tpl_ctrl=g('template_ctrl').innerHTML
.replace(/^\s*/,'')
.replace(/\s*$/,'');//去掉空白格
// 3.2 定义最终输出的Html变量
var out_main = [];
var out_ctrl = [];
// 3.3 遍历所有数据,构建最终输出HTML
for ( i in data){
var _html_main=tpl_main
.replace(/{{index}}/g,data[i].img)//g表示全局
.replace(/{{h2}}/g,data[i].h1)
.replace(/{{h3}}/g,data[i].h2);
var _html_ctrl=tpl_ctrl
.replace(/{{index}}/g,data[i].img);
out_main.push(_html_main);
out_ctrl.push(_html_ctrl);
}
// 3.4 把HTML回写到对应的DOM
g('template_main').innerHTML=out_main.join('');
g('template_ctrl').innerHTML=out_ctrl.join('');
}
// 5. 幻灯片切换
function switchSlider(n){
// 5.1 获得展现的幻灯片&控制按钮 DOM
var main = g('main_'+n);
var ctrl = g('ctrl_'+n);
// 5.2 获得所有幻灯片以及按钮
var clear_main = g('.main-i');
var clear_ctrl = g('.ctrl-i');
// 5.3 清除active样式
for( i=0;i<clear_ctrl.length;i++){
clear_main[i].className=clear_main[i].className.replace('main-i_active','');
clear_ctrl[i].className=clear_ctrl[i].className.replace('ctrl-i_active','');
}
// 5.4 添加active样式
main.className += ' main-i_active ';//修改类名,激活
ctrl.className += ' ctrl-i_active ';
}
6.动态调整图片的 margin-top 使其垂直居中
function movePictures(){
var pictures = g('.picture');
for(i=0;i<pictures.length;i++){
pictures[i].style.marginTop = (-1 * pictures[i].clientHeight/2) + 'px'
}
// 4. 定义何时处理幻灯片输出
window.onload=function(){
addSliders();
switchSlider(1);
setTimeout(function(){
movePictures();
},100)
}
</script>
</div>
</body>
</html>
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2回答
-
- 慕娘5782655
- 2015-08-25 22:55:01
return document.getElementByClassName(id.substr(1));少了s
-
- 慕娘5782655
- 2015-08-25 22:49:58
控制台报错:Uncaught TypeError: Object #<HTMLDocument> has no method 'getElementByClassName'
JS+CSS3实现带预览图幻灯片效果
同样的幻灯片，不一样的切换，学会实现思路，操作很简单
53759 学习 · 265 问题
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