如何在嵌套行上设置断点 Bootstrap

Question

我目前正在学习制作一个响应式网站。当屏幕尺寸发生变化时，我对如何对内容进行断点感到困惑。这就是我想做的：

以下代码仅适用于桌面尺寸：

             <div className="row wrapper-about">
                <div className="col-lg-6 col-md-6 col-6">                  
                    <div className="img-box">
                      <img src="/pp1.jpg" alt="foto.jpg" />
                    </div>
                </div>
               <div className="col-lg-6 col-md-6 col-6">
                  <div className="row">
                      <div className="desc-container">
                        <h5 className="text-justify">
                          Content 2
                        </h5>
                      </div>
                  </div>
                  <div className="row desc2-d">
                      <span>
                        Content3                   
                      </span>
                  </div>
                </div>
             </div>

Answer 1

获得此布局的最简单方法（无需额外的 CSS 或重复标记）是为更大的屏幕宽度禁用 flexbox 并使用浮动工具：

https://www.codeply.com/go/snVOquHz1k

<div class="container">
    <div class="row d-md-block">
        <div class="col-6 col-md-8 float-left border border-danger c1">
        c1
        </div>
        <div class="col-6 col-md-4 float-left border border-success">
        c2
        </div>
        <div class="col-12 col-md-4 float-left  border border-warning">
        c3
        </div>
    </div> 
</div>

之前已经回答过类似的问题：

Rearranging responsive Bootstrap 4 grid layout
Bootstrap with different order on mobile version
One tall div next to two shorter divs on Desktop and stacked on Mobile with Bootstrap 4
Bootstrap 4 - Stack 2 columns with 1 large column on the right

Answer 2

使用 Bootstrap 网格，您必须放置 C3 div 两次。一次在第一行的第二列（用于桌面视图）和另一列在第一行下方（用于移动视图）；然后根据 768px 断点切换可见性以获得你想要的...

代码 sn-p 如下：

.divC1 {
  border: 5px solid red;
  height: 300px;
}

.divC2 {
  border: 5px solid green;
  height: 150px;
}

.divC3 {
  border: 5px solid yellow;
  height: 150px;
}

@media screen and (max-width:768px) {
  .divC2 {
    height: 300px
  }
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">


<div class="container-fluid">
  <div class="row">

    <div class='col-6 col-sm-6'>
      <div class="row">
        <div class="col-sm-12 divC1"> C1
        </div>
      </div>
    </div>

    <div class='col-6 col-sm-6'>
      <div class="row">
        <div class="col-sm-12 divC2"> C2
        </div>
        <div class="col-sm-12 divC3 d-none d-md-block"> C3
        </div>
      </div>
    </div>

    <div class='col-12 divC3 d-block d-md-none'> C3
    </div>

  </div>
</div>

Answer 3

我认为下面的代码会对你有所帮助。

.c1 { height:200px; outline:2px solid red; outline-offset: -5px; }	
	.c2 { height:100px; outline:2px solid green; outline-offset: -5px; }
	.c3 { height:100px; outline:2px solid yellow; outline-offset: -5px; }
	
	@media only screen and (max-width:768px) and (min-width:200px) {  

       .c1 { height:auto; }	
	   .c2 { height:auto; }
	   .c3 { height:auto;}    

     } 

<meta name="viewport" content="width=device-width, initial-scale=1">
  
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    
    
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6 c1">
C1
</div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6 c2">
C2
</div>

<div class="col-lg-6 col-md-6 col-sm-6 col-xs-12 c3">
C3
</div>