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CSS layout is centered and aligned, with fixed width on the left and adaptive on the right.

高洛峰
高洛峰Original
2017-03-31 10:34:312755browse
    CSS页面布局是web前端开发的最基本的技能,本文将介绍一些常见的布局方法,涉及到盒子布局,column布局,flex布局等内容。本文中,你可以看到一些水平垂直居中的方法,左侧固定宽度,右侧自适应的一些方法。如果你有更多关于布局方面的技巧,欢迎留言交流。一、神奇的居中    经常看到有一些面试题问如何实现水平垂直居中,还要求用多种方法。唉唉唉!下面介绍一下我所知道的实现居中的方法。(1)父元素relative;子元素absolute,top:50%;left:50%;margin-left:-自己宽度的一半;margin-right:-自己高度的一半。
nbsp;html>


    <meta>
    <title>水平垂直居中2</title>
    <style>
        .container{
            width: 100%;
            height: 500px;
            background: red;
            position: relative;
        }
        .child{
            width: 300px;
            height: 300px;
            background: blue;
            position: absolute;
            left: 50%;
            margin-left: -150px;
            top: 50%;
            margin-top: -150px;
        }
    </style>


    <div>
        <div></div>
    </div>

This method requires knowing the width and height of the child elements.

(2)父元素:relative;子元素:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
nbsp;html>


    <meta>
    <title>水平垂直居中3</title>
    <style>
        .container{
            background: red;
            width: 100%;
            height: 500px;
            position: relative;
        }
        .child{
            background: blue;
            width: 300px;
            height: 300px;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);
        }
    </style>


    <div>
        <div></div>
    </div>

<span style="font-size: 14px; font-family: Microsoft YaHei">此法跟上面的相似,但是用到了transform,好处是不需要知道子元素的宽高,兼容性方面我查了一下,看着办吧。<br><img src="https://img.php.cn/upload/article/000/000/013/e6f851faee59ab9abba51c883c21e708-0.png" alt="CSS layout is centered and aligned, with fixed width on the left and adaptive on the right."    style="max-width:90%"  style="max-width:90%" title="CSS layout is centered and aligned, with fixed width on the left and adaptive on the right."><br><strong>(3)父元素:<a href="http://www.php.cn/wiki/927.html" target="_blank">display</a>: flex;justify-content: center;align-items: center;</strong></span>
nbsp;html>


    <meta>
    <title>水平垂直居中1</title>
    <style>
        .container{
            width: 100%;
            height: 400px;
            background: red;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .child{
            width: 300px;
            height: 300px;
            background: blue;
        }
    </style>


    <div>
        <div></div>
    </div>

This method seems a bit high-end, and you don’t need to pay attention to the child elements at all.

(4)水平居中的方法,父元素:text-align:center
nbsp;html>


    <meta>
    <title>水平垂直居中4</title>
    <style>
        .container{
            background: red;
            width: 100%;
            height: 500px;
            text-align: center;
        }
        .child{
            background: blue;
            width: 300px;
            height: 300px;
            margin: auto;
        }
    </style>


    <div>
        <div></div>
    </div>

<span style="font-size: 14px; font-family: Microsoft YaHei">如果子元素里的文字不要水平居中的话,那么用此法将遇到不少麻烦。<strong>(5)水平居中方法,子元素:margin:0 auto;这个好说,不上代码了</strong>好了,关于居中问题就说这么多,如果你还有更好的方法,请告诉我。<br><strong>二、左侧固定宽度,右侧自适应</strong>这是一个比较常见的需求,下面介绍几种实现方法。
(1)左边定宽,左<a href="http://www.php.cn/code/11748.html" target="_blank">浮动</a>,右边不指定宽。</span>
nbsp;html>


    <meta>
    <title>做固定,右边自适应</title>
    <style>
    body{
        margin: 0;
    }
        .aside{
            background: red;
            width:200px;
            height: 500px;
            float: left;
        }
        .main {
            background: blue;
            height: 500px;
        }
    </style>


    <div>
        我是左边的
    </div>
    <div>
        我是主体
        我是主体
        我是主体
        我是主体
        我是主体
    </div>

I accidentally discovered this method while doing experiments, which was an unexpected surprise.

(2) Use padding to occupy the space

nbsp;html>


    <meta>
    <title>左侧固定右侧自适应</title>
    <style>
        .container {
            padding-left: 200px;
            width: 100%;
            position: relative;
        }
        .left{
            position: absolute;
            left: 0;
            right: 0;
            background: red;
            height: 500px;
            width: 200px;
        }
        .right{
            background: blue;
            width: 100%;
            height: 500px;
        }
    </style>


    <div>
        <div>zuobian</div>
        <div>
            新华社俄罗斯喀山3月23日电(记者 魏良磊)中俄执政党对话机制第六次会议和第五届中俄政党论坛23日在俄罗斯喀山举行。和俄罗斯联邦总统普京分别致贺信。
        </div>
    </div>

Note that absolute is separated from the document flow . .right's 100% is relative to the content width of the parent container, not the entire width.

(3) Parent: display:flex; left fixed width; right flex: 1. ok

nbsp;html>


    <meta>
    <title>左边固定,右边自适应</title>
    <style>
        .container{
            display: flex;
        }
        .left{
            width: 200px;
            height: 500px;
            background: red;
        }
        .right{
            background: blue;
            height: 500px;
            flex: 1;
        }
    </style>


    <div>
        <div>zuobian</div>
        <div>
            新华社俄罗斯喀山3月23日电(记者 魏良磊)中俄执政党对话机制第六次会议和第五届中俄政党论坛23日在俄罗斯喀山举行。和俄罗斯联邦总统普京分别致贺信。
        </div>
    </div>

弹性盒子很强,有木有。但是有的是要加前缀的,哪些要加自己查去,有一次做实验,电脑样式正确,手机就是不对,搞了好半天。
(4)父:display:table;左右:display:table-cell;左:定宽。
nbsp;html>


    <meta>
    <title>左边固定,右边自适应</title>
    <style>
        .container{
            display: table;
        }
        .left{
            width: 200px;
            height: 500px;
            background: red;
            display: table-cell;
        }
        .right{
            background: blue;
            height: 500px;
            display: table-cell;
        }
    </style>


    <div>
        <div>zuobian</div>
        <div>
            新华社俄罗斯喀山3月23日电(记者 魏良磊)中俄执政党对话机制第六次会议和第五届中俄政党论坛23日在俄罗斯喀山举行。罗斯联邦总统普京分别致贺信。
        </div>
    </div>

据说这是一种古老的方法,我咋不知道呢?可能我比较年轻吧!

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