自动播放怎么弄？setInterval，页面加载完成后加定时器规定两秒执行switchslider一次，但是每次执行都要i+1。做不出来。。
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>预览图幻灯片</title>
<style type="text/css">
h1,h2{
margin:0;
padding:0;
font-weight:normal;
}
html,body{
margin:0;
padding:0;
}
body{
background-color:#fff;
font-size:100%;
color:#555;
-webkit-font-smoothing:antialiased;
}
.slider{
width:1280px;
margin:0 auto;
position:relative;
}
.slider .main{
width:100%;
height:400px;
overflow:hidden;
position:relative;
}
.slider .main .main-i{
position:absolute;
left:-50%;
top:0;
height:400px;
opacity:0;
transition:all 0.5s;
-webkit-transition:all 0.5s;
z-index:2;
}
.slider .main .main-i-right{
left:50%;
}
#main_background,
.slider .main .main-i-active{
left:0;
opacity:1;
}
#main_background{
z-index:1;
}
.slider .main .main-i .caption{
position: absolute;
right:58%;
top:20%;
text-align:right;
z-index:2;
}
.slider .main .main-i .caption h2{
font-size:2.6rem;
line-height:3rem;
color:#b5b5b5;
margin-right:3rem;
}
.slider .main .main-i .caption h1{
font-size:4.6rem;
color:#000;
font-family:Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
margin-right:-5rem;
}
.slider .main .main-i .caption h1,
.slider .main .main-i .caption h2{
opacity:0;
transition:all .8s 1s;
-webkit-transition:all .8s .6s;
}
.slider .main .main-i-active .caption h1,
.slider .main .main-i-active .caption h2{
opacity:1;
margin-right:0;
}
.slider .main .main-i img{
display:block;
position:relative;
left:0;
top:50%;
z-index:1;
}
.slider .ctrl{
position:absolute;
left:0;
bottom:-13px;
height:13px;
width:100%;
text-align:center;
z-index:9;
font-size: 0;
}
.slider .ctrl .ctrl-i{
display:inline-block;
position:relative;
height:13px;
width:150px;
background-color:#666;
margin-left:1px;
box-shadow:0 1px 1px rgba(0,0,0,0.3);
transition:all 0.3s;
-webkit-transition:all 0.3s;
}
.slider .ctrl .ctrl-i img{
display:block;
width:100%;
border:0;
position:absolute;
left:0;
bottom:50px;
transition:all 0.3s;
-webkit-transition:all 0.3s;
opacity:0;
z-index:0;
}
.slider .ctrl .ctrl-i:hover{
background-color:#f0f0f0;
}
.slider .ctrl .ctrl-i:hover img{
bottom:13px;
opacity:1;
-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))
);
}
.slider .ctrl .ctrl-i-active:hover,
.slider .ctrl .ctrl-i-active{
background-color:#000;
}
.slider .ctrl .ctrl-i-active:hover img{
opacity:0;
}
</style>
</head>
<body>
<div class="slider">
<!-- -->
<div class="main" id="template_main">
<div class="main-i {{css}}" id="main_{{index}}">
<div class="caption">
<h2>{{h2}}</h2>
<h1>{{h1}}</h1>
</div>
<img src="./imgs/{{index}}.jpg" alt="" class="slider_pic" />
</div>
</div>
<div class="ctrl" id="template_ctrl">
<a class="ctrl-i" id="ctrl_{{index}}" href="javascript:switchSlider({{index}});">
<img src="./imgs/{{index}}.jpg" alt="" />
</a>
</div>
</div>
<script type="text/javascript">
var data=[
{img:1,h1:'DUET',h2:'Creative'},
{img:2,h1:'DEVIL',h2:'Friendly'},
{img:3,h1:'COMPATRIOT',h2:'Tranquilent'},
{img:4,h1:'HUSSLER',h2:'Insecure'},
{img:5,h1:'REBEL',h2:'Loving'},
{img:6,h1:'SEEKER',h2:'Passionate'},
{img:7,h1:'FRIEND',h2:'Crazy'},
];
var num=1;
// 获取DOM节点
var g=function(id){
if(id.substr(0,1)=='.'){
return document.getElementsByClassName(id.substr(1));
}
return document.getElementById(id);
}
// 添加幻灯片的操作及对应的按钮
function addSliders(){
var tpl_main=g('template_main').innerHTML
.replace('/^\s*/','')
.replace('/\s*$/','');
var tpl_ctrl=g('template_ctrl').innerHTML
.replace('/^\s*/','')
.replace('/\s*$/','');
// 定义最终输出的HTML的变量
var out_main=[],
out_ctrl=[];
// 遍历数据
for(i in data){
var _html_main=tpl_main
.replace(/{{index}}/g,data[i].img)
.replace(/{{css}}/g,['','main-i-right'][i%2])
.replace(/{{h1}}/g,data[i].h1)
.replace(/{{h2}}/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);
}
g('template_main').innerHTML=out_main.join('');
g('template_ctrl').innerHTML=out_ctrl.join('');
// 加一背景图片
g('template_main').innerHTML+=tpl_main
.replace(/{{h1}}/g,data[0].h1)
.replace(/{{h2}}/g,data[0].h2);
g('main_{{index}}').id="main_background";
}
// 幻灯片切换
function switchSlider(n){
num=n;
console.log(num);
var main=g('main_'+n);
var ctrl=g('ctrl_'+n);
var clear_main=g('.main-i');
var clear_ctrl=g('.ctrl-i');
for(i=0;i<clear_ctrl.length;i++){
clear_ctrl[i].className=clear_ctrl[i].className.replace(' ctrl-i-active','');
clear_main[i].className=clear_main[i].className.replace(' main-i-active','');
}
main.className+=' main-i-active';
ctrl.className+=' ctrl-i-active';
// 切换的时候把当前的图添加到背景图
setTimeout(function(){
g('main_background').innerHTML=main.innerHTML;
},1000);
}
// 调整图片位置
function movePics(){
var slider_pics=g('.slider_pic');
for(i=0; i<slider_pics.length;i++){
slider_pics[i].style.marginTop=(-1*slider_pics[i].clientHeight/2)+'px';
}
}
//自动播放
function autoPlay(){
setInterval(function(){
console.log(num);
switchSlider(num);
num++;
if(num>7){
num=1;
}
},3000);
}
// 定义何时处理幻灯片输出
window.onload=function(){
addSliders();
setTimeout(function(){
movePics();
},100);
switchSlider(1);
autoPlay();
}
</script>
</body>
</html>
var num=1 //全局变量，记录当前播放的幻灯片
var num=1; //定义为全局变量
switchSlide(s){
num=s //在切换幻灯片方法中，手动点击，改变全局变量值，以便自动播放在点击处开始播放
}
//定义自动播放方法
function autoPlay(){
setInterval(function(){
switchSlider(num);
num++;
if(num>7){
num=1;
} },3000); //定时自动切换
}
//在DOM加载后，执行自动播放方法
window.onload=function(){
autoPlay();
｝
//测试，完美自动播放
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Preview Slideshow</title>
<style>
*{
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 .ctrl .ctrl-i,
.slider .main .main-i,
.slider .main,
.slider{
width: 100%;
height: 460px;
position:relative;
}
.slider .main{
overflow: hidden;
}
.slider .main .main-i img{
width: 100%;
position:absolute;
left: 0;
top:50%;
}
.slider .main .main-i .caption{
position: absolute;
right: 50%;
top: 30%;
z-index: 9;
}
.slider .main .main-i .caption h2{
font-size: 40px;
line-height: 50px;
color: #b5b5b5;
text-align: right;
}
.slider .main .main-i .caption h3{
text-align: right;
font-size: 70px;
line-height: 70px;
color: #000;
font-family: 'Open Sans Condensed';
}
.slider .main #main_background{
z-index: 1
}
.slider .ctrl{
width: 100%;
height: 13px;
line-height: 13px;
text-align: center;
position: absolute;
left: 0;
bottom: -13px;
}
.slider .ctrl .ctrl-i{
display: inline-block;
width: 150px;
height: 13px;
background-color: #666;
box-shadow: 0 1px 1px rgba(0,0,0,.3);
z-index: 10;
margin-left: 1px;
}
.slider .ctrl .ctrl-i img{
width: 100%;
position: absolute;
left: 0;
bottom: 50px;
}
/*制作鼠标经过ctrl的效果*/
.slider .ctrl .ctrl-i:hover{
background-color: #f0f0f0;
box-shadow: 0 1px 1px rgba(0,0,0,.3);
}
.slider .ctrl .ctrl-i:hover img{
bottom: 13px;
transition: all .3s ease-in-out;
-webkit-box-reflect:below 0 -webkit-gradient(
linear,
left top,
left bottom,
from(transparent),
color-stop(50%,transparent),
to( rgba(255,255,255,.3))
);
}
.slider .ctrl .ctrl-i-active,
.slider .ctrl .ctrl-i-active:hover{
background-color: #000;
}
.slider .ctrl .ctrl-i:hover img{
opacity: 1;
}
.slider .ctrl .ctrl-i img,
.slider .ctrl .ctrl-i-active img,
.slider .ctrl .ctrl-i-active:hover img{
opacity: 0;
}
.slider .main .main-i .caption{
margin-right: 13%;
}
.slider .main .main-i .caption h2{
margin-right: 45px;
}
.slider .main .main-i .caption h3{
margin-right: -45px;
}
#main_background,
.slider .main .main-i-active{
right: 0;
opacity: 1;
z-index: 2;
}
#main_background{
z-index: 1;
}
.slider .main .main-i-active .caption h2,
.slider .main .main-i-active .caption h3{
margin-right:0;
transition: all 1s 0.8s;
-moz-transition: all 1s 0.8s; /* Firefox 4 */
-webkit-transition: all 1s 0.8s; /* Safari 和 Chrome */
-o-transition: all 1s 0.8s; /* Opera */
}
.slider .main .main-i-active img{
position: absolute;
right: 50%;
top: 50%;
/*margin-top: 50%;*/
}
/*设置幻灯片的样式*/
.slider .main .main-i {
position: absolute;
right: 50%;
top: 0;
opacity: 0;
z-index: 2;
}
.slider .main .main-i-right{
right: -50%;
}
.slider .main .main-i-active{
transition: all 0.8s;
-moz-transition: all 0.8s; /* Firefox 4 */
-webkit-transition: all 0.8s; /* Safari 和 Chrome */
-o-transition: all 0.8s; /* Opera */
opacity: 1;
right: 0;
}
</style>
<script>
var data=[{img:'1',h1:'简单点',h2:'说话的方式简单点'},
{img:'2',h1:'递进的情绪请省略',h2:'你又不是个演员'},
{img:'3',h1:'别设计那些情节',h2:'没意见'},
{img:'4',h1:'我只想看看你怎么圆',h2:'你难过的太表面'},
{img:'5',h1:'像没天赋的演员',h2:'观众一眼能看见'},
{img:'6',h1:'该配合你演出的我',h2:'演视而不见'},
{img:'7',h1:'别逼一个最爱你的人',h2:'即兴表演'}
];
function g(id){
if(id.substr(0,1)=='.'){
return document.getElementsByClassName(id.substr(1));
}else{
return document.getElementById(id);
}
}
function AddSliders(){
var tpl_main = g('template_main').innerHTML;
var tpl_ctrl = g('template_ctrl').innerHTML;
var html_main = tpl_main.replace(/^\s*/,'').replace(/\s*$/,'');
var html_ctrl = tpl_ctrl.replace(/^\s*/,'').replace(/\s*$/,'');
// alert(html_main);
var out_main = [];
var out_ctrl = [];
for(i in data){
add_main = html_main.replace(/{{index}}/g,data[i].img)
.replace(/{{H2}}/g,data[i].h1)
.replace(/{{H3}}/g,data[i].h2)
.replace(/{{css}}/g,['','main-i-right'][i%2]);
add_ctrl = html_ctrl.replace(/{{index}}/g,data[i].img);
//在数组的末尾添加add_main并用逗号分隔
out_main.push(add_main);
out_ctrl.push(add_ctrl);
}
//这里要使用join('')来替换掉自动会生成的','
g('template_main').innerHTML = out_main.join('');
g('template_ctrl').innerHTML = out_ctrl.join('');
g('template_main').innerHTML += html_main.replace(/{{index}}/g,'{{index}}')
.replace(/{{H2}}/g,data[i].h1)
.replace(/{{H3}}/g,data[i].h2);
g('main_{{index}}').id = 'main_background';
}
function switchSlide(s){
var show_main = g('main_'+s);
var show_ctrl = g('ctrl_'+s);
var clear_main = g('.main-i');
var clear_ctrl = g('.ctrl-i');
for (var i = 0; i < g('.ctrl-i').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','');
}
show_main.className += ' main-i-active';
show_ctrl.className += ' ctrl-i-active';
setTimeout(function(){
g('main_background').innerHTML = show_main.innerHTML;
},1000)
n=parseInt(show_main.id.substr(5));
}
function setImgheight(){
var pictures = g('.picture');
for (var i = 0; i < pictures.length; i++) {
pictures[i].style.marginTop = (-1*pictures[i].clientHeight/2)+'px';
}
}
var n;
function autoplay(){
switchSlide(n);
n++;
if(n>7){
n=1;
}
}
window.onload = function(){
AddSliders();
setTimeout(function(){
setImgheight();
},100)
//页面加载时执行第一张图的点击效果，5秒后调用自动播放函数，再过两秒切换到第一张，再过两秒切第二张
switchSlide(1);
setInterval(function(){
autoplay();
},4000)
}
</script>
</head>
<body>
<div>
<div id="template_main">
<div class="main-i {{css}}" id="main_{{index}}">
<div>
<h2>{{H2}}</h2>
<h3>{{H3}}</h3>
</div>
<img src="imgs/{{index}}.jpg" alt="">
</div>
</div>
<div id="template_ctrl">
<a id="ctrl_{{index}}" href="javascript:switchSlide({{index}});">
<img src="imgs/{{index}}.jpg" alt="">
</a>
</div>
</div>
</body>
</html>这样放代码好像才能用
走了一个循环遍历改变I值然后延时触发点击事件的弯路，发现循环它不会等你动画执行完再加一。后来设全局变量解决的，本人菜鸡，代码肯定还能优化。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Preview Slideshow</title>
<style>
*{
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 .ctrl .ctrl-i,
.slider .main .main-i,
.slider .main,
.slider{
width: 100%;
height: 460px;
position:relative;
}
.slider .main{
overflow: hidden;
}
.slider .main .main-i img{
width: 100%;
position:absolute;
left: 0;
top:50%;
}
.slider .main .main-i .caption{
position: absolute;
right: 50%;
top: 30%;
z-index: 9;
}
.slider .main .main-i .caption h2{
font-size: 40px;
line-height: 50px;
color: #b5b5b5;
text-align: right;
}
.slider .main .main-i .caption h3{
text-align: right;
font-size: 70px;
line-height: 70px;
color: #000;
font-family: 'Open Sans Condensed';
}
.slider .main #main_background{
z-index: 1
}
.slider .ctrl{
width: 100%;
height: 13px;
line-height: 13px;
text-align: center;
position: absolute;
left: 0;
bottom: -13px;
}
.slider .ctrl .ctrl-i{
display: inline-block;
width: 150px;
height: 13px;
background-color: #666;
box-shadow: 0 1px 1px rgba(0,0,0,.3);
z-index: 10;
margin-left: 1px;
}
.slider .ctrl .ctrl-i img{
width: 100%;
position: absolute;
left: 0;
bottom: 50px;
}
/*制作鼠标经过ctrl的效果*/
.slider .ctrl .ctrl-i:hover{
background-color: #f0f0f0;
box-shadow: 0 1px 1px rgba(0,0,0,.3);
}
.slider .ctrl .ctrl-i:hover img{
bottom: 13px;
transition: all .3s ease-in-out;
-webkit-box-reflect:below 0 -webkit-gradient(
linear,
left top,
left bottom,
from(transparent),
color-stop(50%,transparent),
to( rgba(255,255,255,.3))
);
}
.slider .ctrl .ctrl-i-active,
.slider .ctrl .ctrl-i-active:hover{
background-color: #000;
}
.slider .ctrl .ctrl-i:hover img{
opacity: 1;
}
.slider .ctrl .ctrl-i img,
.slider .ctrl .ctrl-i-active img,
.slider .ctrl .ctrl-i-active:hover img{
opacity: 0;
}
.slider .main .main-i .caption{
margin-right: 13%;
}
.slider .main .main-i .caption h2{
margin-right: 45px;
}
.slider .main .main-i .caption h3{
margin-right: -45px;
}
#main_background,
.slider .main .main-i-active{
right: 0;
opacity: 1;
z-index: 2;
}
#main_background{
z-index: 1;
}
.slider .main .main-i-active .caption h2,
.slider .main .main-i-active .caption h3{
margin-right:0;
transition: all 1s 0.8s;
-moz-transition: all 1s 0.8s; /* Firefox 4 */
-webkit-transition: all 1s 0.8s; /* Safari 和 Chrome */
-o-transition: all 1s 0.8s; /* Opera */
}
.slider .main .main-i-active img{
position: absolute;
right: 50%;
top: 50%;
/*margin-top: 50%;*/
}
/*设置幻灯片的样式*/
.slider .main .main-i {
position: absolute;
right: 50%;
top: 0;
opacity: 0;
z-index: 2;
}
.slider .main .main-i-right{
right: -50%;
}
.slider .main .main-i-active{
transition: all 0.8s;
-moz-transition: all 0.8s; /* Firefox 4 */
-webkit-transition: all 0.8s; /* Safari 和 Chrome */
-o-transition: all 0.8s; /* Opera */
opacity: 1;
right: 0;
}
</style>
<script>
var data=[{img:'1',h1:'简单点',h2:'说话的方式简单点'},
{img:'2',h1:'递进的情绪请省略',h2:'你又不是个演员'},
{img:'3',h1:'别设计那些情节',h2:'没意见'},
{img:'4',h1:'我只想看看你怎么圆',h2:'你难过的太表面'},
{img:'5',h1:'像没天赋的演员',h2:'观众一眼能看见'},
{img:'6',h1:'该配合你演出的我',h2:'演视而不见'},
{img:'7',h1:'别逼一个最爱你的人',h2:'即兴表演'}
];
function g(id){
if(id.substr(0,1)=='.'){
return document.getElementsByClassName(id.substr(1));
}else{
return document.getElementById(id);
}
}
function AddSliders(){
var tpl_main = g('template_main').innerHTML;
var tpl_ctrl = g('template_ctrl').innerHTML;
var html_main = tpl_main.replace(/^\s*/,'').replace(/\s*$/,'');
var html_ctrl = tpl_ctrl.replace(/^\s*/,'').replace(/\s*$/,'');
// alert(html_main);
var out_main = [];
var out_ctrl = [];
for(i in data){
add_main = html_main.replace(/{{index}}/g,data[i].img)
.replace(/{{H2}}/g,data[i].h1)
.replace(/{{H3}}/g,data[i].h2)
.replace(/{{css}}/g,['','main-i-right'][i%2]);
add_ctrl = html_ctrl.replace(/{{index}}/g,data[i].img);
//在数组的末尾添加add_main并用逗号分隔
out_main.push(add_main);
out_ctrl.push(add_ctrl);
}
//这里要使用join('')来替换掉自动会生成的','
g('template_main').innerHTML = out_main.join('');
g('template_ctrl').innerHTML = out_ctrl.join('');
g('template_main').innerHTML += html_main.replace(/{{index}}/g,'{{index}}')
.replace(/{{H2}}/g,data[i].h1)
.replace(/{{H3}}/g,data[i].h2);
g('main_{{index}}').id = 'main_background';
}
function switchSlide(s){
var show_main = g('main_'+s);
var show_ctrl = g('ctrl_'+s);
var clear_main = g('.main-i');
var clear_ctrl = g('.ctrl-i');
for (var i = 0; i < g('.ctrl-i').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','');
}
show_main.className += ' main-i-active';
show_ctrl.className += ' ctrl-i-active';
setTimeout(function(){
g('main_background').innerHTML = show_main.innerHTML;
},1000)
n=parseInt(show_main.id.substr(5));
}
function setImgheight(){
var pictures = g('.picture');
for (var i = 0; i < pictures.length; i++) {
pictures[i].style.marginTop = (-1*pictures[i].clientHeight/2)+'px';
}
}
var n;
function autoplay(){
switchSlide(n);
n++;
if(n>7){
n=1;
}
}
window.onload = function(){
AddSliders();
setTimeout(function(){
setImgheight();
},100)
//页面加载时执行第一张图的点击效果，5秒后调用自动播放函数，再过两秒切换到第一张，再过两秒切第二张
switchSlide(1);
setInterval(function(){
autoplay();
},4000)
}
</script>
</head>
<body>
<div>
<div id="template_main">
<div class="main-i {{css}}" id="main_{{index}}">
<div>
<h2>{{H2}}</h2>
<h3>{{H3}}</h3>
</div>
<img src="imgs/{{index}}.jpg" alt="">
</div>
</div>
<div id="template_ctrl">
<a id="ctrl_{{index}}" href="javascript:switchSlide({{index}});">
<img src="imgs/{{index}}.jpg" alt="">
</a>
</div>
</div>
</body>
</html>