3个div在同一行答案

【问题标题】：3 divs same line3个div在同一行
【发布时间】：2018-04-09 14:40:55
【问题描述】：

我想用左菜单、右菜单和中间的页面制作一个布局，就像这样： http://3.bp.blogspot.com/-82HunzQsyzI/T0RaxdMxUvI/AAAAAAAAAx0/mKkTADcL_34/s1600/tc.PNG

我正在尝试使用 boostrap 4（帮助我处理负责任的事情），但我不能将 3 个菜单放在同一行

我做错了什么？

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

    <title>Test</title>
  </head>
  <body>
    <style type="text/css">
      #tela {
        color: blue;
        display: inline;
        /* height:100vh; */
      }
    </style>

    <main>

    <nav class="navbar navbar-expand-lg navbar-light bg-light">
      <a class="navbar-brand" href="#">Navbar</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
        <div class="navbar-nav">
          <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
          <a class="nav-item nav-link" href="#">Features</a>
          <a class="nav-item nav-link" href="#">Pricing</a>
          <a class="nav-item nav-link disabled" href="#">Disabled</a>
        </div>
      </div>
    </nav>


    <div class="container" id="tela">
      <div class="col-md-2" id="left_menu" style="background-color: green; height: 300px;">
        GREEN
      </div>
      <div class="col-md-6" id="middle" style="background-color: yellow; height: 300px;">
        YELLOW
      </div>
      <div class="col-md-2" id="right_menu" style="background-color: red; height: 300px;">
        RED
      </div>
    </div>

    <footer class="footer" style="background-color: black;">
      <div class="container">
        <span class="text-muted">Place sticky footer content here.</span>
      </div>
    </footer>


    </main>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
  </body>
</html>

【问题讨论】：

容器内的行和行内的列...遵循引导规则

标签： html css twitter-bootstrap bootstrap-4

【解决方案1】：

使用正确的 Bootstrap 4 类。下面我用过： .d-flex 和 .flex-row 而不是 .container .col 和 .col-6 用于列定义

希望这会有所帮助。

#tela {
  color: blue;
  //display: inline;
  height:300px;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>


<main>

  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
    <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
      <div class="navbar-nav">
        <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
        <a class="nav-item nav-link" href="#">Features</a>
        <a class="nav-item nav-link" href="#">Pricing</a>
        <a class="nav-item nav-link disabled" href="#">Disabled</a>
      </div>
    </div>
  </nav>


  <div class="d-flex flex-row" id="tela">
    <div class="col" id="left_menu" style="background-color: green;">
      GREEN
    </div>
    <div class="col-6" id="middle" style="background-color: yellow">
      YELLOW
    </div>
    <div class="col" id="right_menu" style="background-color: red;">
      RED
    </div>
  </div>

  <footer class="footer" style="background-color: black;">
    <div class="container">
      <span class="text-muted">Place sticky footer content here.</span>
    </div>
  </footer>


</main>

【讨论】：

【解决方案2】：

<div class="row"> 换行可能会起作用。

【讨论】：

只是它不能修复，但可以提供帮助

【解决方案3】：

您需要将您的页面划分如下，col 类的总和应为 12，并且在 div 和 class="row" 内以在页面上水平扩展

<div class="row">
    <div class="col-md-2"> /* left menu */ </div> 
    <div class="col-md-8"> /* middle page */ </div>
    <div class="col-md-2"> /* right menu */ </div>
</div>

更多信息请查看Bootstrapb Grid system

<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

<style type="text/css">
  #tela {
    color: blue;
    display: inline;
    /* height:100vh; */
  }
</style>

<main>

  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
    <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
      <div class="navbar-nav">
        <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
        <a class="nav-item nav-link" href="#">Features</a>
        <a class="nav-item nav-link" href="#">Pricing</a>
        <a class="nav-item nav-link disabled" href="#">Disabled</a>
      </div>
    </div>
  </nav>


  <div class="container" id="tela">
    <div class="row">
      <div class="col-md-2" id="left_menu" style="background-color: green; height: 300px;">
        GREEN
      </div>
      <div class="col-md-8" id="middle" style="background-color: yellow; height: 300px;">
        YELLOW
      </div>
      <div class="col-md-2" id="right_menu" style="background-color: red; height: 300px;">
        RED
      </div>
    </div>
  </div>
  <footer class="footer" style="background-color: black;">
    <div class="container">
      <span class="text-muted">Place sticky footer content here.</span>
    </div>
  </footer>


</main>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

【讨论】：

你的意思是总必须有 12 个？
是的，2 + 8 + 2 > 12