Bootstrap导航栏链接颜色不会更改 [英] Bootstrap navbar link color won't change

问题描述

我需要将导航栏链接更改为白色，并在导航栏上将它们隔开.我已经为此编写了代码，但似乎无法弄清楚为什么/在哪里不断被重写.导航栏的背景是图像，链接似乎变为白色，而其中没有图像，那么有没有办法解决该问题并将图像保留在背景中?

I need to change my navbar links to white and space them out across the navbar. I have written code for this but I can't seem to figure out why/where it keeps getting overridden. The background of the navbar is an image and the links seem to change to white without the image in there, so is there a way to fix that and keep the image in the background?

有人可以帮助我了解我在做什么错吗?

Can anyone help me understand what I'm doing wrong?

.navbar {
  background-image: url("images/navbarbgnew.png");
  background-size: cover;
  margin: -30px 0 15px 0;
}

.navbar ul {
  display: flex;
  justify-content: space-around;
}

.navbar ul li a {
  color: #FFF;
  font-family: "Helvetica," sans-serif;
  font-weight: 600;
  font-size: 14px;
}

<nav class="navbar navbar-expand-md navbar-light bg-light mb-3">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"><span class="navbar-toggler-icon"></span></button>
  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="nav navbar-nav">
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          BOOKS
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="#">Branding Sutra</a>
        </div>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          LEARNING LAB
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="#">Workshops</a>
          <a class="dropdown-item" href="#">Classes</a>
          <a class="dropdown-item" href="#">Audio Downloads</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">SERVICES</a>
      </li>
    </ul>
  </div>
</nav>

推荐答案

有人可以帮助我了解我在做什么吗?

Can anyone help me understand what I'm doing wrong?

您的自定义CSS规则的特异性必须匹配或超过相应的Bootstrap规则的特异性.

The specificity of your custom css rule must either match or exceed the specificity of the corresponding Bootstrap rule.

因此，在这种情况下，您需要一个看起来像这样的规则:

So, in this particular case you need a rule that looks like this:

.navbar-light .navbar-nav .nav-link {
    color: red;
}

单击下面的运行代码段"按钮，然后展开到整页以验证其是否有效:

Click "run code snippet" button below and expand to full page to verify that it works:

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

<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>
    
<style>
.navbar-light .navbar-nav .nav-link {
    color: red;
}
</style>

<nav class="navbar navbar-expand-md navbar-light bg-light mb-3">
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"><span class="navbar-toggler-icon"></span></button>
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="nav navbar-nav">
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    BOOKS
                </a>
                <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                    <a class="dropdown-item" href="#">Branding Sutra</a>
                </div>
            </li>
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    LEARNING LAB
                </a>
                <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                    <a class="dropdown-item" href="#">Workshops</a>
                    <a class="dropdown-item" href="#">Classes</a>
                    <a class="dropdown-item" href="#">Audio Downloads</a>
                </div>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">SERVICES</a>
            </li>
        </ul>
    </div>
</nav>

有关CSS特异性的更多信息:

More info about CSS specificity:

https://developer.mozilla.org/zh-CN/docs/Web/CSS/Specificity

并且: CSS特异性计算器

这篇关于Bootstrap导航栏链接颜色不会更改的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！