CSS弹性盒模型flex在布局中的应用详解

前面的话

前面已经详细介绍过flex弹性盒模型的基本语法和兼容写法，本文将介绍flex在布局中的应用
 
元素居中【1】伸缩容器上使用主轴对齐justify-content和侧轴对齐align-items

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   </span></span></li> 
    <li><span>.parent{   </span></li> 
    <li class="alt"><span>    display: flex;   </span></li> 
    <li><span>    justify-content: center;   </span></li> 
    <li class="alt"><span>    align-items: center;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent"  style="background-color: lightgrey; height: 100px; width: 200px;">
    <div class="in" style="background-color: lightblue;">DEMOdiv>
div>

【2】在伸缩项目上使用margin:auto

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   </span></span></li> 
    <li><span>.parent{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>.in{   </span></li> 
    <li><span>    </span><span class="keyword">margin</span><span>: </span><span class="string">auto</span><span>;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent"  style="background-color: lightgrey;height: 100px;width: 200px;">
    <div class="in" style="background-color: lightblue;">DEMOdiv>
div>

两端对齐

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   </span></span></li> 
    <li><span>.parent{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li><span>    </span><span class="string">justify</span><span>-</span><span class="keyword">content</span><span>:space-between   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent"  style="background-color: lightgrey;height: 100px;width: 200px;">
    <div class="in" style="background-color: lightblue;">DEMOdiv>
    <div class="in" style="background-color: lightgreen;">DEMOdiv>
    <div class="in" style="background-color: lightcyan;">DEMOdiv>
    <div class="in" style="background-color: lightseagreen;">DEMOdiv>
div>

底端对齐

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   </span></span></li> 
    <li><span>.parent{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li><span>    align-items: flex-end;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent"  style="background-color: lightgrey;height: 100px;width: 200px;">
    <div class="in" style="background-color: lightblue; height:20px;">DEMOdiv>
    <div class="in" style="background-color: lightgreen; height:30px;">DEMOdiv>
    <div class="in" style="background-color: lightcyan; height:40px;">DEMOdiv>
    <div class="in" style="background-color: lightseagreen; height:50px;">DEMOdiv>
div>

输入框按钮

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   </span></span></li> 
    <li><span>.inputBox{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li><span>    </span><span class="keyword">width</span><span>: </span><span class="string">250px</span><span>;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>.inputBox-ipt{   </span></li> 
    <li class="alt"><span>    flex: 1;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>

XML/HTML Code 复制内容到剪贴板

<div class="inputBox">
  <input class="inputBox-ipt">
  <button class="inputBox-btn">按钮button>
div>

等分布局

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   </span></span></li> 
    <li><span>body,p{</span><span class="keyword">margin</span><span>: 0;}   </span></li> 
    <li class="alt"><span>.parent{   </span></li> 
    <li><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>.child{   </span></li> 
    <li class="alt"><span>    flex:1;   </span></li> 
    <li><span>    </span><span class="keyword">height</span><span>: </span><span class="string">100px</span><span>;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>.child + .child{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">margin-left</span><span>: </span><span class="string">20px</span><span>;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent" style="background-color: lightgrey;">
    <div class="child" style="background-color: lightblue;">1div>
    <div class="child" style="background-color: lightgreen;">2div>
    <div class="child" style="background-color: lightsalmon;">3div>
    <div class="child" style="background-color: pink;">4div>
div>

多列自适应布局

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   </span></span></li> 
    <li><span>p{</span><span class="keyword">margin</span><span>: 0;}   </span></li> 
    <li class="alt"><span>.parent{</span><span class="keyword">display</span><span>: flex;}   </span></li> 
    <li><span>.</span><span class="string">left</span><span>,.</span><span class="string">center</span><span>{</span><span class="keyword">margin-right</span><span>: </span><span class="string">20px</span><span>;}   </span></li> 
    <li class="alt"><span>.</span><span class="keyword">right</span><span class="string">right</span><span>{flex: 1;}   </span></li> 
    <li><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent" style="background-color: lightgrey;">
    <div class="left" style="background-color: lightblue;">
        <p>leftp>
        <p>leftp>
    div>
    <div class="center" style="background-color: pink;">
        <p>centerp>
        <p>centerp>
    div>
    <div class="right"  style="background-color: lightgreen;">
        <p>rightp>
        <p>rightp>
    div>
div>

悬挂布局

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           </span></span></li> 
    <li><span>.box{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li><span>    </span><span class="keyword">background-color</span><span>: lightgrey;   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">width</span><span>: </span><span class="string">300px</span><span>;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>.</span><span class="string">left</span><span>{   </span></li> 
    <li><span>    </span><span class="keyword">margin-right</span><span>: </span><span class="string">20px</span><span>;   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">background-color</span><span>: lightblue;   </span></li> 
    <li><span>    </span><span class="keyword">height</span><span>: </span><span class="string">30px</span><span>;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>.main{   </span></li> 
    <li class="alt"><span>    flex:1;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>

XML/HTML Code 复制内容到剪贴板

<div class="box">
    <div class="left">左侧悬挂div>
    <div class="main">主要内容主要内容主要内容主要内容主要内容主要内容主要内容主要内容主要内容主要内容主要内容主要内容主要内容div>
div>

全屏布局

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   </span></span></li> 
    <li><span>body,p{</span><span class="keyword">margin</span><span>: 0;}   </span></li> 
    <li class="alt"><span>body,html,.parent{</span><span class="keyword">height</span><span>: 100%;}   </span></li> 
    <li><span>.parent{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li><span>    flex-</span><span class="keyword">direction</span><span>: column;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>.</span><span class="string">top</span><span>,.</span><span class="keyword">bottom</span><span class="string">bottom</span><span>{   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">height</span><span>: </span><span class="string">50px</span><span>;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>.</span><span class="string">middle</span><span>{   </span></li> 
    <li><span>    </span><span class="keyword">display</span><span>: flex;   </span></li> 
    <li class="alt"><span>    flex: 1;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>.</span><span class="string">left</span><span>{   </span></li> 
    <li><span>    </span><span class="keyword">width</span><span>: </span><span class="string">100px</span><span>;   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">margin-right</span><span>: </span><span class="string">20px</span><span>;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>.</span><span class="keyword">right</span><span class="string">right</span><span>{   </span></li> 
    <li><span>    flex: 1;   </span></li> 
    <li class="alt"><span>    </span><span class="keyword">overflow</span><span>: </span><span class="string">auto</span><span>;   </span></li> 
    <li><span>}   </span></li> 
    <li class="alt"><span>.</span><span class="keyword">right</span><span class="string">right</span><span>-in{   </span></li> 
    <li><span>    </span><span class="keyword">height</span><span>: </span><span class="string">1000px</span><span>;   </span></li> 
    <li class="alt"><span>}   </span></li> 
    <li><span>

XML/HTML Code 复制内容到剪贴板

<div class="parent" id="parent" style="background-color: lightgrey;">
    <div class="top" style="background-color: lightblue;">
        <p>topp>
    div>
    <div class="middle" style="background-color: pink;">
        <div class="left" style="background-color: orange;">
            <p>leftp>
        div>
        <div class="right" style="background-color: lightsalmon;">
            <div class="right-in">
                <p>rightp>
            div>
        div>
    div>
    <div class="bottom" style="background-color: lightgreen;">
        <p>bottomp>
    div>
div>

以上这篇CSS弹性盒模型flex在布局中的应用详解就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。

原文地址：http://www.cnblogs.com/xiaohuochai/archive/2016/05/24/5460201.html