我正在尝试在图像上叠加一些文字,并使背景图像0.2透明。现在我的问题是:如何使伪元素的背景图像拉伸以适应宽度或裁剪图像以适应屏幕(不扭曲图像)?编辑codepen here上的代码。
的CSS:
#main:after {
content : "";
display: block;
position: absolute;
top: 0;
left: 0;
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Selwyn_College_Old_Court%2C_Cambridge%2C_UK_-_Diliff.jpg/944px-Selwyn_College_Old_Court%2C_Cambridge%2C_UK_-_Diliff.jpg);
width: 100%;
height: 100%;
opacity : 0.2;
z-index: -1;
}
HTML:
<div id="main">
Text on top, no big deal, no big deal. Just a little text and stuff. That's all.
</div>
答案 0 :(得分:0)
您可以使用:
#main:after {
content : "";
display: block;
position: absolute;
top: 0;
left: 0;
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Selwyn_College_Old_Court%2C_Cambridge%2C_UK_-_Diliff.jpg/944px-Selwyn_College_Old_Court%2C_Cambridge%2C_UK_-_Diliff.jpg);
width: 100%;
height: 100%;
opacity : 0.2;
z-index: -1;
background-size: 100% 100%; /* added*/
background-repeat: no-repeat; /* optinal*/
}
或者像这样的一行语法:
background-size: auto|length|cover|contain|initial|inherit;
详细信息click.
答案 1 :(得分:0)
目前还不完全清楚你要做什么,但你可以尝试添加background-size:cover
,如下所示:
<强> CSS 强>
#main:after {
content : "";
display: block;
position: absolute;
top: 0;
left: 0;
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Selwyn_College_Old_Court%2C_Cambridge%2C_UK_-_Diliff.jpg/944px-Selwyn_College_Old_Court%2C_Cambridge%2C_UK_-_Diliff.jpg);
background-repeat: no-repeat;
background-size: cover;
width: 100%;
height: 100%;
opacity : 0.2;
z-index: -1;
}