CSS彈性盒模型flex在佈局中的使用方法

CSS彈性盒模型flex在佈局中的應用

元素居中

【1】在伸縮容器上使用主軸對齊justify-content和側軸對齊align-items

<style>.parent{
    display: flex;
    justify-content: center;
    align-items: center;}</style>
<div class="parent"  style="background-color: lightgrey; height: 100px; width: 200px;">
    <div class="in" style="background-color: lightblue;">DEMO</div>      </div>

【2】在伸縮項目上使用margin:auto

<style>.parent{
    display: flex;}.in{
    margin: auto;}</style>
<div class="parent"  style="background-color: lightgrey;height: 100px;width: 200px;">
    <div class="in" style="background-color: lightblue;">DEMO</div>      </div>

兩端對齊

<style>.parent{
   display: flex;    
   justify-content:space-between
   }
</style>
<div class="parent"  style="background-color: lightgrey;height: 100px;width: 200px;">
    <div class="in" style="background-color: lightblue;">DEMO</div>
    <div class="in" style="background-color: lightgreen;">DEMO</div>
    <div class="in" style="background-color: lightcyan;">DEMO</div>    
    <div class="in" style="background-color: lightseagreen;">DEMO</div>     
 </div>

底端對齊

<style>.parent{
    display: flex;
    align-items: flex-end;
    }
</style>
<div class="parent"  style="background-color: lightgrey;height: 100px;width: 200px;">
    <div class="in" style="background-color: lightblue; height:20px;">DEMO</div>
    <div class="in" style="background-color: lightgreen; height:30px;">DEMO</div>
    <div class="in" style="background-color: lightcyan; height:40px;">DEMO</div>
    <div class="in" style="background-color: lightseagreen; height:50px;">DEMO</div>      
</div>

輸入框按鈕

<style>.inputBox{
    display: flex;
    width: 250px;}.inputBox-ipt{
    flex: 1;}
</style>
<div class="inputBox">
  <input class="inputBox-ipt">
  <button class="inputBox-btn">按钮</button>
</div>

等分割佈局

<style>body,p{margin: 0;}.parent{
    display: flex;}.child{
    flex:1;
    height: 100px;}.child + .child{
    margin-left: 20px;}
</style>
<div class="parent" style="background-color: lightgrey;">
    <div class="child" style="background-color: lightblue;">1</div>
    <div class="child" style="background-color: lightgreen;">2</div>
    <div class="child" style="background-color: lightsalmon;">3</div>
    <div class="child" style="background-color: pink;">4</div>                
</div>

多列自適應佈局

<style>p{margin: 0;}.parent{display: flex;}.left,.center{margin-right: 20px;}.right{flex: 1;}</style>
<div class="parent" style="background-color: lightgrey;">
    <div class="left" style="background-color: lightblue;">
        <p>left</p>
        <p>left</p>
    </div>            
    <div class="center" style="background-color: pink;">
        <p>center</p>
        <p>center</p>
    </div>            
    <div class="right"  style="background-color: lightgreen;">
        <p>right</p>
        <p>right</p>
    </div>                    
</div>

懸掛佈局##

<style>        
     .box{
    display: flex;
    background-color: lightgrey;
    width: 300px;}.left{
    margin-right: 20px;
    background-color: lightblue;
    height: 30px;}.main{
    flex:1;}
 </style>
<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>

全螢幕佈局

<style>body,p{margin: 0;}body,html,.parent{height: 100%;}.parent{
    display: flex;
    flex-direction: column;}.top,.bottom{
    height: 50px;}.middle{
    display: flex;
    flex: 1;}.left{
    width: 100px;
    margin-right: 20px;}.right{
    flex: 1;
    overflow: auto;}.right-in{
    height: 1000px;}</style>
<div class="parent" id="parent" style="background-color: lightgrey;">
    <div class="top" style="background-color: lightblue;">
        <p>top</p>
    </div> 
    <div class="middle" style="background-color: pink;">
        <div class="left" style="background-color: orange;">
            <p>left</p>
        </div>     
        <div class="right" style="background-color: lightsalmon;">
            <div class="right-in">
                <p>right</p>
            </div>            
        </div>                    
    </div>              
    <div class="bottom" style="background-color: lightgreen;">
        <p>bottom</p>
    </div>        
</div>

以上就是CSS彈性盒模型flex在佈局中的應用的全部內容。

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