【发布时间】：2018-05-20 10:17:22
【问题描述】：
我有一张图片应该位于列上方和导航栏下方 100 vh 的高度。然而，虽然图像应该存在的空间在那里，但图像本身似乎已经消失了。该 URL 也确实指向一个站点，因此它不像已损坏。我试图弄清楚为什么我的图像没有渲染以及我可以做些什么来帮助它渲染。 使用 Flexbox 有什么好的方法来做到这一点？ flexbox 是不是最有效的方式？
这是我的 HTML：
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" href="styles.css">
<link href="https://fonts.googleapis.com/css?family=Roboto:300i" rel="stylesheet">
</head>
<body>
<header>
<nav>
<li><a href = "#"> Home</a></li>
<li><a href = "#"> Heading1</a></li>
<li><a href = "#"> Heading2</a></li>
<li><a href = "#"> Heading3</a></li>
</nav>
</header>
<div class="hero">
</div>
<div class="container">
<div class="side1">
<h2>Column 1</h2>
<p>
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
</p>
</div>
<div class="main-content">
<h2>Main-content</h2>
<p>
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?"
</p>
</div>
<div class="side2">
<h2>Column 2</h2>
<p>
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
</p>
</div>
</div>
</body>
</html>
这是我的 CSS...
* {
box-sizing: border-box;
}
body, html {
margin: 0;
width:100%;
}
header {
-webkit-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
-moz-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
display: block;
margin-top:-10px:
width: 100%;
border-radius: 5px;
background-color: white;
border-color: black;
height: 30%;
padding-right:0px;
}
.hero {
height: 100vh;
background: url(https://www.pexels.com/photo/coffee-writing-computer-blogging-34676/);
background-size: cover;
width: 100%;
padding-bottom: 20px;
}
nav {
display: block;
}
nav li {
font-weight: 700;
list-style-type: none;
text-align: center;
font-size: 25px;
font-weight: bold;
font-family: Roboto, sans-serif;
}
li {
border-top: grey solid 1px;
}
nav a {
text-decoration: none;
color: grey;
display:inline-block;
line-height: 45px;
}
li:nth-child(1){
border-top: none;
padding-bottom:10px;
margin:0px;
}
li:nth-child(2){
padding-top:10px;
margin:0px;
}
li:nth-child(3){
margin:0px;
padding-top:10px;
}
li:nth-child(4){
margin:0px;
padding-top:10px;
}
.container {
display: flex;
flex-direction: column;
flex-wrap: nowrap;
justify-content: space-between;
font-family: Roboto,sans-serif;
line-height: 1.6;
}
.side1 {
-webkit-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
-moz-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
width:100%;
background: white;
border-color: black;
text-align: center;
margin-bottom: 10px;
}
.main-content {
-webkit-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
-moz-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
width:100%;
background: white;
border-color: black;
text-align: center;
margin-bottom: 10px;
}
.side2 {
-webkit-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
-moz-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
width:100%;
background: white;
border-color: black;
text-align: center;
margin-bottom: 10px;
}
@media screen and (min-width : 726px) {
@media screen and (min-width : 900px) {
.header {
display:flex;
}
header {
-webkit-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
-moz-box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
box-shadow: -1px 2px 17px 0px rgba(0,0,0,0.75);
width: 100%;
align-items: center;
border-radius: 5px;
background-color: white;
border-color: black;
height: 30%;
padding: 10px;
}
nav {
display: flex;
flex-direction: row;
justify-content: space-around;
}
li:nth-child(1){
border-top: grey solid 1px;
padding-top:10px;
margin:0px;
}
.container {
display:flex;
flex-direction: row;
align-items: center;
justify-content: space-around;
flex-wrap: wrap;
}
.main-content {
border-left: lightgrey 1px solid;
border-right: lightgrey 1px solid;
width: 33.3%;
}
.side1 {
width: 30%;
}
.side2 {
width: 30%;
}
}
【问题讨论】：