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Detailed explanation of CSS double flying wing layout

php中世界最好的语言Original: 2018-03-21 13:28:082666browse

This time I will bring you a detailed explanation of the CSS double-flying wing layout. What are the precautions for implementing the CSS double-flying wing layout? The following is a practical case, let’s take a look.

Double flying wing layout is a three-column layout with fixed width and height at both ends and adaptive middle one.

Let’s take a picture first. The gray blocks on the left and right have fixed width and height. The green area in the middle is width and height adaptive

Method 1: Implemented through flex elastic layout

Look at the code

//HTML结构，p2是中间的自适应区域
...
<body>
    <p class="wrap">
        <p class="p1"></p>  
        <p class="p2"></p>
        <p class="p3"></p>
    </p>
</body>
...

*{  //先简单粗暴的解决一下浏览器的默认样式  
    margin: 0;
    padding: 0;
    border: 0;
    box-sizing:border-box;   //使用border-box，盒模型好计算，妈妈再也不用担心我算不清块宽高了
}
.wrap{
    width: 100%;
    height: 100%;
    display: flex;     //使用弹性布局
    flex-flow:row nowrap;  //以沿主轴方向行显示，不换行，从而来显示3个块
    justify-content:space-around;  //这一个加和不叫其实也没事，加上去的意思就是两端对齐
}

[class^=&#39;p&#39;]{  // 给所有的p都加上高和边框样式，方便观看，不然都缩成一条线了
    height: 400px;
    border: 1px solid #f00;
}

.p1,.p3{  //给两端的p固定的宽
    width: 200px;
    background-color: #ccc;
    flex-shrink: 1; //默认是1，所以不用写也没事，写出来自是表达这个意思
}
.p2{
    background-color: #0f0;
    flex-grow:1;  //这个比较重要，作用是让第二个块的宽度撑满剩余的空间
}

Method 2: Achieve through positioning

HTML structure remains unchanged, look at the style

.wrap{
    width: 100%;  //同样实现宽高100%铺开
    height: 100%;
    position: relative;  //父层添加相对定位，让子元素相对父层来定位
}
[class^=&#39;p&#39;]{
    height: 400px;
    border: 1px solid #f00;
}
.p1,.p3{
    position: absolute;
    width: 200px;
    background-color: #ccc;
}
.p1{
    left: 0;  //固定在父层的左侧
    top: 0;
}
.p3{
    right: 0;  //固定在父层的右侧
    top: 0;
}
.p2{
    background-color: #0f0;
    /*这个是关键，我们没有给中间的p2添加过宽属性，所以默认占用父层宽的100%，
     由于两侧块宽是固定的，所以中间的自适应块左右分别200px的外边距中间的content区域就会实现自适应*/
    margin: 0 200px;  
}

Effect

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related matters on the php Chinese website article!
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