Question

所以我花了几个小时试图在其他人的帖子的帮助下自己解决这个问题，但没有运气。请允许我先解释一下我的问题。

我的网站www.discoverbugs.org有一个自举导航菜单。它在桌面上看起来很好，但在移动设备上，当您点击它时，下拉菜单就会消失。导致它的原因以及如何解决？

第二个问题是标题图片。在移动设备上，它可以扩展到手机的整个宽度。我在网站上发现了很多图片。我尝试添加最大和最小宽度，它只是为我工作。有人可以帮我编辑一下吗？看起来很荒谬。

CSS：

@media screen and (max-width: 420px) { header {
padding: 65px 0 0px;  } }

的index.php

    <header class="bg-primary text-white">
  <div class="container text-center">
    <img src="img/header-v6.jpg">
  </div>
</header>

Header.php（导航菜单）

 <!-- Navigation -->
<nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top" id="mainNav">
  <div class="container">
    <a class="navbar-brand js-scroll-trigger" href="index.php">Discover Bugs</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarResponsive">
      <ul class="navbar-nav ml-auto">
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="index.php">Home</a>
        </li>
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="testimonials.php">Testimonials</a>
        </li>
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="collections.php">Collections</a>
        </li>
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="form.php">Costs & Booking</a>
        </li>
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="faq.php">FAQ</a>
        </li>
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="contact.php">Contact</a>
        </li>
      </ul>
    </div>
  </div>
</nav>

我有Javascript编码：

<script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>

Answer 1

原因很简单：Bootstrap 3 JavaScript不适用于Bootstrap 4.

换句话说，对于Bootstrap 4 css，您还需要Bootstrap 4 JavaScript（以及jQuery 3.2.1和popper.js）。

要修复标题图片问题，请将img-fluid类添加到图片中，如下所示：

<img class="img-fluid" src="img/header-v6.jpg">

这将使图像响应。

要解决第一个问题，请使用以下模板中的css和JavaScript文件（并按顺序加载）：

<!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">
  </head>
  <body>

<nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top" id="mainNav">
    <div class="container">
        <a class="navbar-brand js-scroll-trigger" href="index.php">Discover Bugs</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarResponsive">
            <ul class="navbar-nav ml-auto">
                <li class="nav-item">
                    <a class="nav-link js-scroll-trigger" href="index.php">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link js-scroll-trigger" href="testimonials.php">Testimonials</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link js-scroll-trigger" href="collections.php">Collections</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link js-scroll-trigger" href="form.php">Costs & Booking</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link js-scroll-trigger" href="faq.php">FAQ</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link js-scroll-trigger" href="contact.php">Contact</a>
                </li>
            </ul>
        </div>
    </div>
</nav>

<div class="container mt-5 pt-5">
    <div class="row">
        <div class="col">
            <h1>Hello, world!</h1>
        </div>
    </div>
</div>

    <!-- 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>

在手机/＆amp; amp;上点击Bootstrap菜单消失标题图片不会调整大小

1 个答案: