全屏响应式背景图片 [英] Full-screen responsive background image
问题描述
我对前端开发和基础非常陌生.
我试图让 <div class="main-header">
成为一个全屏图像,可以响应地缩小.
谁能告诉我我做错了什么?它正确缩放,但未显示完整图像.我还希望 <div class="large-6 large-offset-6 columns">
在移动设备上位于其上方——这可能吗?
HTML:
<div class="main-header"><div class="row"><div class="large-6 large-offset-6 columns"><h1 class="logo">BleepBleeps</h1><h3>一群小朋友<br>让育儿更轻松</h3>
<!-- END large-6 large-offset-6 列--></div><!-- END ROW --></div><!-- END MAIN-HEADER -->
CSS:
.main-header {背景图片:网址(../img/bb-background2.png);背景重复:不重复;背景位置:中心;背景尺寸:封面;宽度:100%;高度:100%;}h1.logo {文本缩进:-9999px;高度:115px;保证金最高:10%;}
http://css-技巧.com/perfect-full-page-background-image/
//HTML<img src="images/bg.jpg" id="bg" alt="">//CSS#bg {位置:固定;顶部:0;左:0;/* 保持长宽比 */最小宽度:100%;最小高度:100%;}
或
img.bg {/* 设置规则以填充背景 */最小高度:100%;最小宽度:1024px;/* 设置比例缩放 */宽度:100%;高度:自动;/* 设置定位 */位置:固定;顶部:0;左:0;}@media screen and (max-width: 1024px) {/* 特定于此特定图像 */img.bg {左:50%;左边距:-512px;/* 50% */}}
或
//HTML<img src="images/bg.jpg" id="bg" alt="">//CSS#bg { 位置:固定;顶部:0;左:0;}.bgwidth { 宽度:100%;}.bgheight { 高度:100%;}//jQuery$(window).load(function() {var theWindow = $(window),$bg = $("#bg"),纵横比 = $bg.width()/$bg.height();函数 resizeBg() {if ((theWindow.width()/theWindow.height()) < aspectRatio ) {$bg.removeClass().addClass('bgheight');} 别的 {$bg.removeClass().addClass('bgwidth');}}theWindow.resize(resizeBg).trigger("resize");});
I am very new to Front-end development and Foundation.
I am trying to get <div class="main-header">
to be a full screen image that scales down responsively.
Can anyone tell me what I am doing wrong? It is scaling properly, but is not showing the full image. I also wanted the <div class="large-6 large-offset-6 columns">
to sit above it on a mobile device – is that possible?
The HTML:
<!-- MAIN HEADER -->
<div class="main-header">
<div class="row">
<div class="large-6 large-offset-6 columns">
<h1 class="logo">BleepBleeps</h1>
<h3>A family of little friends<br>that make parenting easier</h3>
</div> <!-- END large-6 large-offset-6 columns -->
</div><!-- END ROW -->
</div><!-- END MAIN-HEADER -->
The CSS:
.main-header {
background-image: url(../img/bb-background2.png);
background-repeat: no-repeat;
background-position: center;
background-size: cover;
width: 100%;
height: 100%;
}
h1.logo {
text-indent: -9999px;
height:115px;
margin-top: 10%;
}
http://css-tricks.com/perfect-full-page-background-image/
//HTML
<img src="images/bg.jpg" id="bg" alt="">
//CSS
#bg {
position: fixed;
top: 0;
left: 0;
/* Preserve aspet ratio */
min-width: 100%;
min-height: 100%;
}
OR
img.bg {
/* Set rules to fill background */
min-height: 100%;
min-width: 1024px;
/* Set up proportionate scaling */
width: 100%;
height: auto;
/* Set up positioning */
position: fixed;
top: 0;
left: 0;
}
@media screen and (max-width: 1024px) { /* Specific to this particular image */
img.bg {
left: 50%;
margin-left: -512px; /* 50% */
}
}
OR
//HTML
<img src="images/bg.jpg" id="bg" alt="">
//CSS
#bg { position: fixed; top: 0; left: 0; }
.bgwidth { width: 100%; }
.bgheight { height: 100%; }
//jQuery
$(window).load(function() {
var theWindow = $(window),
$bg = $("#bg"),
aspectRatio = $bg.width() / $bg.height();
function resizeBg() {
if ( (theWindow.width() / theWindow.height()) < aspectRatio ) {
$bg
.removeClass()
.addClass('bgheight');
} else {
$bg
.removeClass()
.addClass('bgwidth');
}
}
theWindow.resize(resizeBg).trigger("resize");
});
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