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220 lines
3.9 KiB
Markdown
220 lines
3.9 KiB
Markdown
一屏网页
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需要在css最开始加入下面核心代码：
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```html
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html,body {
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height:100%;
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}
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```
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示例代码1：
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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<link rel="stylesheet" href="./css/base.css">
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<style>
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html,
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body {
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height: 100%;
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}
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.aic {
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height: 90%;
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background-color: pink;
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}
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.menu {
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height: 10%;
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background-color: brown;
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}
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.menu ul {
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width: 80%;
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height: 100%;
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background-color: #ff0;
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margin: 0 auto;
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}
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.menu li {
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float: left;
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height: 100%;
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width: 12.5%;
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position: relative;
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}
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.menu a {
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position: absolute;
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top: 50%;
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left: 50%;
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transform: translate(-50%, -50%);
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}
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</style>
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</head>
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<body>
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<div class="menu">
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<ul>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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</ul>
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</div>
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<div class="aic"></div>
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</body>
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</html>
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```
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上面这个不好，li的宽度设置百分比，li的个数确定了。
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示例代码2：
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下面的代码将ul的高度确定（比如设置为文字的高度），而不是百分比高度，然后将ul定位后，li就自动定位了，然后设置li的margin即可。
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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<link rel="stylesheet" href="./css/base.css">
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<style>
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html,
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body {
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height: 100%;
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}
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.aic {
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height: 90%;
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background-color: pink;
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}
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.menu {
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height: 10%;
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background-color: brown;
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position: relative;
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}
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.menu ul {
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width: 100%;
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height: 30px;
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line-height: 30px;
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text-align: center;
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position: absolute;
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top: 0;
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bottom: 0;
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margin: auto;
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}
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.menu li {
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display: inline-block;
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margin: 0 10px;
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}
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</style>
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</head>
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<body>
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<div class="menu">
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<ul>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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<li>
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<a href="javascript:;">首页</a>
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</li>
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</ul>
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</div>
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<div class="aic"></div>
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</body>
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</html>
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```
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20181012
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**上面的ul宽度是不确定的，而li需要一行显示并且居中显示，**
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**那么就设置ul：text-align:center; 设置 li：display:inline-block.**
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**此时有个问题就是 li 之间有间距，解决办法就是设置ul：font-size:0;**
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vertical-align:top;是没法解决的，它解决的是上下的问题。
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