堆栈上有很多这样的问题，但答案并没有解决我的问题，正如你所看到的，我试图通过在文本的父div上创建背景图像来创建图像上的这个小文本。图像没有显示由于图像没有任何高度，我给100％的高度也没有工作，快速堆栈搜索说给html 100％由于父亲应该有一些高度，但我这样做不是解决问题。我想要一些响应高度控制，因此我想使用％。当然不想使用px值
我的代码
h1, h2, h3, h4, h5, h6 {
font-family: 'Teko', sans-serif;
}
html {
font-size: 18px;
}
@media (min-width: 576px) {
.container {
max-width: 540px;
}
}
@media (min-width: 768px) {
.container {
max-width: 720px;
}
}
@media (min-width: 992px) {
.container {
max-width: 960px;
}
}
@media (min-width: 1200px) {
.container {
max-width: 1400px;
}
}
h1, .h1 {
font-size: 3.815rem;
}
h2, .h2 {
font-size: 2.441rem;
}
h3, .h3 {
font-size: 1.563rem;
}
h4, .h4 {
font-size: 1.25rem;
}
html, body {
height: 100%;
}
.cta-location .cta-location-bg {
background-image: url("https://www.dropbox.com/s/5x8p2z5cvip5u38/chicago.jpg?dl=1");
height: 100%;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
position: relative;
}
.cta-location .cta-location-text-content {
text-align: center;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
color: white;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>slick slider</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link href="http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css" rel="stylesheet">
<link rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.2/css/bootstrap-select.min.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="my-6">
<div class="cta-location h-100">
<div class="bg-dark text-white cta-location-bg">
<div class="container d-flex align-items-center">
<div class="row w-100">
<!-- <div class="text-left col-lg-4 col-sm-12 cta-location-text-content"> -->
<div class="cta-location-text-content">
<h2 class="card-title ">
Your Success, Without Borders
</h2>
<p class="card-text ">
Our global network of strategic locations puts us close to your operations, so you can get the
products, service and support you need fast.
</p>
<div class="">
<a href="" class="btn btn-primary">Find a location</a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin="anonymous"></script>
<script src="./js/extra-jquery.js"></script>
</body>
</html>这里有几个问题，但值得注意的是，您的内容绝对定位，以便容器全部折叠并且高度为0。这是我更改为至少要显示背景的规则，你可以看到我几乎注释掉了所有内容：
.cta-location .cta-location-text-content {
/* text-align: center;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%); */
color: white;
}
除了position: absolute之外，您还需要采用不同的方法来集中内容。
h1, h2, h3, h4, h5, h6 {
font-family: 'Teko', sans-serif;
}
html {
font-size: 18px;
}
@media (min-width: 576px) {
.container {
max-width: 540px;
}
}
@media (min-width: 768px) {
.container {
max-width: 720px;
}
}
@media (min-width: 992px) {
.container {
max-width: 960px;
}
}
@media (min-width: 1200px) {
.container {
max-width: 1400px;
}
}
h1, .h1 {
font-size: 3.815rem;
}
h2, .h2 {
font-size: 2.441rem;
}
h3, .h3 {
font-size: 1.563rem;
}
h4, .h4 {
font-size: 1.25rem;
}
html, body {
height: 100%;
}
.cta-location .cta-location-bg {
background-image: url("https://www.dropbox.com/s/5x8p2z5cvip5u38/chicago.jpg?dl=1");
background-position: center;
background-repeat: no-repeat;
background-size: cover;
position: relative;
}
.cta-location .cta-location-text-content {
/* text-align: center;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%); */
color: white;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>slick slider</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link href="http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css" rel="stylesheet">
<link rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.2/css/bootstrap-select.min.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="my-6">
<div class="cta-location h-100">
<div class="bg-dark text-white cta-location-bg">
<div class="container d-flex align-items-center">
<div class="row w-100">
<!-- <div class="text-left col-lg-4 col-sm-12 cta-location-text-content"> -->
<div class="cta-location-text-content">
<h2 class="card-title ">
Your Success, Without Borders
</h2>
<p class="card-text ">
Our global network of strategic locations puts us close to your operations, so you can get the
products, service and support you need fast.
</p>
<div class="">
<a href="" class="btn btn-primary">Find a location</a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin="anonymous"></script>
<script src="./js/extra-jquery.js"></script>
</body>
</html>将height: 100%更改为height: 100vh将解决您的问题，我希望它能帮到您。谢谢
h1, h2, h3, h4, h5, h6 {
font-family: 'Teko', sans-serif;
}
html {
font-size: 18px;
}
@media (min-width: 576px) {
.container {
max-width: 540px;
}
}
@media (min-width: 768px) {
.container {
max-width: 720px;
}
}
@media (min-width: 992px) {
.container {
max-width: 960px;
}
}
@media (min-width: 1200px) {
.container {
max-width: 1400px;
}
}
h1, .h1 {
font-size: 3.815rem;
}
h2, .h2 {
font-size: 2.441rem;
}
h3, .h3 {
font-size: 1.563rem;
}
h4, .h4 {
font-size: 1.25rem;
}
html, body {
height: 100%;
}
.cta-location .cta-location-bg {
background-image: url("https://www.dropbox.com/s/5x8p2z5cvip5u38/chicago.jpg?dl=1");
height: 100vh;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
position: relative;
}
.cta-location .cta-location-text-content {
text-align: center;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
color: white;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>slick slider</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link href="http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css" rel="stylesheet">
<link rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.2/css/bootstrap-select.min.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="my-6">
<div class="cta-location h-100">
<div class="bg-dark text-white cta-location-bg">
<div class="container d-flex align-items-center">
<div class="row w-100">
<!-- <div class="text-left col-lg-4 col-sm-12 cta-location-text-content"> -->
<div class="cta-location-text-content">
<h2 class="card-title ">
Your Success, Without Borders
</h2>
<p class="card-text ">
Our global network of strategic locations puts us close to your operations, so you can get the
products, service and support you need fast.
</p>
<div class="">
<a href="" class="btn btn-primary">Find a location</a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin="anonymous"></script>
<script src="./js/extra-jquery.js"></script>
</body>
</html>