背景图片只出现在前两列，不出现在整个容器的背景中。我使用了下面的代码:
<div class="container-fluid bg">
<div class="row">
<div class="col-md-4 col-sm-6 col-xs-12">
</div>
<div class="col-md-4 col-sm-6 col-xs-12">
<form class="form-container">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
<div class="col-md-4 col-sm-6 col-xs-12">
</div>
</div>
</div>
and css file is:
.bg{
background: url('bg.jpg');
height: 100%;
width: 100%;
background-repeat: no-repeat;
}
.form-container{
border: 1px solid;
}
最佳答案
使用 background-repeat: no-repeat;背景大小:覆盖；
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<style>
body, html {
height: 100%;
margin: 0;
}
.bg {
/* The image used */
background-image: url("https://www.w3schools.com/howto/img_parallax.jpg");
/* Full height */
height: 100%;
/* Center and scale the image nicely */
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
</style>
</head>
<body>
<div class="bg">
<div class="container-fluid bg">
<div class="row">
<div class="col-md-4 col-sm-6 col-xs-12">
</div>
<div class="col-md-4 col-sm-6 col-xs-12">
<form class="form-container">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
<div class="col-md-4 col-sm-6 col-xs-12">
</div>
</div>
</div>
</div>
</body>
</html>关于html - 为什么背景图像不适合引导流体容器？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52588352/