Question

我试图将导航栏居中，而不会丢失多余的导航栏。我的意思是我希望导航栏显示在整个屏幕上，但导航栏中的文本居中。我发现如果我将SS中的ul {}的宽度更改为...... 28％，则它会在屏幕上居中。但是我希望将它保持在100％，以便我在整个顶部都有导航栏。如何在导航栏中居中文本？

ul {
    list-style-type: NONE;
    margin: auto;
    padding: 0;
    width: 100%;
    background-color: #449DA2;
	text-align: center;
	font-size: 15px;
	height: 100%
	position: fixed;
	overflow: auto;
}

<!DOCTYPE html>
<html>
<head>
<body bgcolor=black>
<style>

li { 
    float: left;
}

li a, .dropbtn {
    display: inline-block;
    color: white;
    text-align: center;
    padding: 24px 30px;
    text-decoration: none;
}

li a:hover, .dropdown:hover .dropbtn {
    background-color: gray;
}

li.dropdown {
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: White;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.dropdown:hover .dropdown-content {
    display: block;
}
</style>
<link rel="stylesheet" href="style.css">
</head>
<body>

<ul>

<li class="dropdown"><a href="#home">Info Page</a></li>
  <li class="dropdown">
   <a href="javascript:void(0)" class="dropbtn">East</a>
    <div class="dropdown-content">
      <a href="#">Maryland</a>
      <a href="#">Massachusetts</a>
      <a href="#">New England</a>
      <a href="#">New Jersey</a>
      <a href="#">Pennsylvania</a>
      <a href="#">Virginia</a>
      <a href="#">Washington D.C.</a>
    </div>

  <li class="dropdown">
   <a href="javascript:void(0)" class="dropbtn">Central</a>
    <div class="dropdown-content">
      <a href="#">Illinois</a>
      <a href="#">Indiana</a>
      <a href="#">Michigan</a>
      <a href="#">Minnesota</a>
      <a href="#">Texas</a>
    </div>

  <li class="dropdown">
   <a href="javascript:void(0)" class="dropbtn">South</a>
    <div class="dropdown-content">
      <a href="#">Atlanta</a>
      <a href="#">Bowling Green</a>
      <a href="#">Charleston</a>
      <a href="#">Chattanooga</a>
      <a href="#">Jackson</a>
      <a href="#">Memphis</a>
      <a href="#">Miami</a>
      <a href="#">Nashville</a>
      <a href="#">Panama</a>
      <a href="#">Sarasota</a>
      <a href="#">Savannah</a>
      <a href="#">Tallahassee</a>
      <a href="#">WPB</a>
    </div>

  <li class="dropdown">
    <a href="javascript:void(0)" class="dropbtn">West</a>
    <div class="dropdown-content">
      <a href="#">California</a>
      <a href="#">Colorado</a>
      <a href="#">New Mexico</a>
      <a href="#">Utah</a>
      <a href="#">Washington</a>
    </div>
  </li>
</ul>

</body>
</html>

Answer 1

您需要在代码中更改的唯一内容是typedef std::function<bool(int)> myFunctor;的规则：删除li并添加float: left;，然后display: inline-block设置text-align: center将变得有效：

ul

body {
  background: black;
}

ul {
  list-style-type: NONE;
  margin: auto;
  padding: 0;
  width: 100%;
  background-color: #449DA2;
  text-align: center;
  font-size: 15px;
  height: 100% position: fixed;
  overflow: auto;
}

li {
  display: inline-block;
}

li a,
.dropbtn {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 24px 30px;
  text-decoration: none;
}

li a:hover,
.dropdown:hover .dropbtn {
  background-color: gray;
}

li.dropdown {
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: White;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.dropdown-content a:hover {
  background-color: #f1f1f1
}

.dropdown:hover .dropdown-content {
  display: block;
}

以UL NavBar为中心

1 个答案: