0

我正在使用的代码是这个

background: url(bilder/cover.jpg) no-repeat center center fixed; 
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}

我想要完成的是，背景图像在 2 秒后更改为背景图像，然后保持不变。

我知道有 Jqueries 可以改变这样的背景，但我不确定如何使用我正在使用的代码来制作类似的东西！如果有人对此有解决方案，那就太棒了！

我改变背景的出发点是我在 w3schools 上找到的代码：

{
width:100px;
height:100px;
background:red;
animation:myfirst 5s;
-webkit-animation:myfirst 5s; /* Safari and Chrome */
}

@keyframes myfirst
{
from {background:red;}
to {background:yellow;}
}

@-webkit-keyframes myfirst /* Safari and Chrome */
{
from {background:red;}
to {background:yellow;}
}
4

2 回答 2

1

例子

HTML

<div id="myBackground"></div>

CSS

#myBackground {
    bottom: 0;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;

    background: url(http://jsfiddle.net/img/initializing.png) no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

JavaScript

var imgUrl = "url(http://cdn.css-tricks.com/wp-content/themes/CSS-Tricks-10/images/bg.png)";

$(function() {    //    starts when page is loaded and ready
    setTimeout(function() {
        $("#myBackground").css("background-image", imgUrl);
    }, 2000);    //    2 second timer
})

替代风格（带有淡入/淡出效果）

HTML

<div id="myBackground">
    <img src="http://jsfiddle.net/img/initializing.png" />
    <img src="http://cdn.css-tricks.com/wp-content/themes/CSS-Tricks-10/images/bg.png" />
</div>

CSS

#myBackground {
    bottom: 0;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;
}
#myBackground img {
    height: 100%;
    width: 100%;
}
#myBackground img:nth-child(2) {
    display: none;
}

JavaScript

$(function() {    //    starts when page is loaded and ready
    setTimeout(function() {
        $("#myBackground img:nth-child(1)").fadeOut("slow");
        $("#myBackground img:nth-child(2)").fadeIn(1500);
    }, 2000);    //    2 second timer
})
于 2013-05-03T13:16:21.453 回答
0 
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<meta charset=utf-8 />
<title>demo by roXon</title>


<script  src="s.js"></script>
<style>

article, aside, figure, footer, header, hgroup, 
menu, nav, section { display: block; }

*{margin:0;padding:0;}
ul{list-style:none;}
a{text-decoration:none;}

body{background:#000;}

.images{
margin:50px;
position:relative;
}
.images img{
position:absolute;
}

.glowed{
box-shadow: 0px 0px 40px 2px #fff
}

</style>
</head>
<body>

<button id="stop">STOP IT!</button>

<div class="images">
<img src="images/9.jpg" />
<img src="images/9red.jpg" class="glowed"/>
</div>



<script>
var stop = false;

function loop(){
if(stop===false){
$('.images img:eq(1)').fadeIn(700, function(){
$(this).fadeOut(700,loop);
});
}
}

loop(); // start loop


$('#stop').click(function(){
stop=true;
});
</script>


</body>
</html>
于 2013-05-12T17:44:58.680 回答