我想在div中放置2张图像作为背景图像。
这是我放的代码,但我只看到第二张图片。
#wrap-header {
max-width: 100%;
height: 400px;
background-image: url("../assets/header_background.png"), url("../assets/circle_header_background.png");
background-repeat: no-repeat;
background-position: center bottom, center top;
}
<div id="wrap-header">
</div>
我想要检索一个图像在另一个图像下的效果,或者一个图像作为第一个图层,第二个图像作为第一个图层。
我找不到办法。你可以帮助我吗?
答案 0 :(得分:2)
您可以使用CSS选择器:在之后和:之前
首先,将以下内容添加到#wrap-header:
#wrap-header {
position: relative;
overflow: hidden;
max-width: 100%;
height: 400px;
}
然后使用选择器:
#wrap-header:before {
content: '';
position: absolute;
top: 0;
left: 0;
height: 50%;
width: 100%;
background-image: url('image1');
background-repeat: no-repeat;
background-position: center
}
#wrap-header:after {
content: '';
position: absolute;
bottom: 0;
left: 0;
height: 50%;
width: 100%;
background-image: url('image2');
background-repeat: no-repeat;
background-position: center;
}
答案 1 :(得分:2)
您可以使用background-size: 100% 50%
执行此操作,其中100%
的第一个值表示图像的宽度 ,第二个是 height ,设置为50%
或总是#wrap-header
height
的一半:
#wrap-header {
/*max-width: 100%; by default*/
height: 400px;
background-image: url('https://placeimg.com/1600/200/any'), url('https://placeimg.com/1600/201/any');
background-repeat: no-repeat;
background-position: bottom, top;
background-size: 100% 50%;
}
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<div id="wrap-header"></div>
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答案 2 :(得分:0)
这可以通过伪元素的帮助来完成:在
之前和之后
#wrap-header {
max-width: 100%;
height: 400px;
}
#wrap-header:before {
content: "";
width: 100%;
height: 100%;
background-image: url("https://boutiqueme.com/static/4/generated/30-pattern-44-ff81c0.png");
background-repeat: no-repeat;
background-size: cover;
position: absolute;
top: 0;
left: 0;
z-index: 2;
}
#wrap-header:after {
content: "";
width: 100%;
height: 100%;
background-image: url("https://cdn.pixabay.com/photo/2016/04/12/00/04/hero-1323464_960_720.png");
background-repeat: no-repeat;
background-size: cover;
position: absolute;
top: 0;
left: 0;
z-index: 1;
}
<div id="wrap-header">
</div>
答案 3 :(得分:0)
您可以使用 if (isset($_SERVER['HTTP_ORIGIN'])){
header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
header('Access-Control-Allow-Credentials: true');
header('Access-Control-Max-Age: 86400'); // cache for 1 day
}
// Access-Control headers are received during OPTIONS requests
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS')
{
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
header("Access-Control-Allow-Methods: GET, POST,OPTIONS");
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");
exit(0);
}
和:before
:after
选择器来实现此目标
pseudo
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/* Set #wrap-header to relative so that :before and :after does not goes outside */
#wrap-header {
max-width: 100%;
height: 400px;
position: relative;
}
#wrap-header:before,
#wrap-header:after {
content: "";
position: absolute;
left: 0;
right: 0;
bottom: 0;
top: 0;
}
/* Set First Background Image */
#wrap-header:before {
background: url("http://via.placeholder.com/850x450") center bottom no-repeat;
}
/* Set Second Background Image */
#wrap-header:after {
background: url("http://via.placeholder.com/900x450") center top no-repeat;
opacity: 0.3; /* Set transparency as per your requirement */
}
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