即使使用不同的显示器/分辨率也可以使徽标居中

Question

我想将徽标居中。我能够通过定义填充和内容来居中，但问题是当我尝试在不同的显示器/分辨率上查看时，徽标会移动。

以下是代码：

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/* Navigation */
.navbar {-moz-border-radius: 0;-webkit-border-radius: 0;border-radius: 0;margin-bottom: 0;}
.navbar .container {text-align: center; position: center; background-color: #fff; right:55px;}
.navbar-default {-moz-transition: all 0.3s ease-out;-o-transition: all 0.3s ease-out;-webkit-transition: all 0.3s ease-out;transition: all 0.3s ease-out;width: 100%;border: none;border-bottom: 0px solid #e7e7e7;background-color: #fff; }
.navbar-default .navbar-nav > li > a {color: #000;font-weight: normal;font-size: 15px; display: inline-block; padding-right: 23px; padding-left: 23px}
.navbar-default .navbar-nav > li > a:hover {background-color: transparent;color: #005FA6;}
.navbar-default .navbar-nav > .open > a,.navbar-default .navbar-nav > .open > a:hover,.navbar-default .navbar-nav > .open > a:focus {background-color: transparent;color: #005FA6;}
.navbar-default .navbar-nav .active > a,.navbar-default .navbar-nav .active > a:hover,.navbar-default .navbar-nav .active > a:focus {color: #005FA6;background-color: transparent;}
.navbar-default .navbar-toggle {margin: 10px 0 0 15px;}
.navbar-default .navbar-toggle,.navbar-default .navbar-toggle:hover,.navbar-default .navbar-toggle:focus {border: none;background: #f3f3f3;}
.navbar-default .navbar-toggle i {font-size: 31px;}
.navbar-default .navbar-collapse {float: right; border-top: none;padding-left: 0;padding-right: 0;}
.navbar-brand>img {padding: 5px; align: center;}

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<nav class="navbar navbar-default">
  <div class="container">
    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-navbar-collapse">
      <span class="sr-only">Toggle Navigation</span>
      <i class="fa fa-bars"></i>
    </button>
    <a href="index.php" class="navbar-brand">
      <img src="img/corelogo.png" alt="" height="150" width="150">
    </a>
   </div>
</nav>

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Answer 1

将您的徽标<img>标记设为display:block。然后给它左右边距auto。

以下示例：

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/* Navigation */

.navbar {
  -moz-border-radius: 0;
  -webkit-border-radius: 0;
  border-radius: 0;
  margin-bottom: 0;
}

.navbar .container {
  text-align: center;
  position: center;
  background-color: #fff;
  right: 55px;
}

.navbar-default {
  -moz-transition: all 0.3s ease-out;
  -o-transition: all 0.3s ease-out;
  -webkit-transition: all 0.3s ease-out;
  transition: all 0.3s ease-out;
  width: 100%;
  border: none;
  border-bottom: 0px solid #e7e7e7;
  background-color: #fff;
}

.navbar-default .navbar-nav>li>a {
  color: #000;
  font-weight: normal;
  font-size: 15px;
  display: inline-block;
  padding-right: 23px;
  padding-left: 23px
}

.navbar-default .navbar-nav>li>a:hover {
  background-color: transparent;
  color: #005FA6;
}

.navbar-default .navbar-nav>.open>a,
.navbar-default .navbar-nav>.open>a:hover,
.navbar-default .navbar-nav>.open>a:focus {
  background-color: transparent;
  color: #005FA6;
}

.navbar-default .navbar-nav .active>a,
.navbar-default .navbar-nav .active>a:hover,
.navbar-default .navbar-nav .active>a:focus {
  color: #005FA6;
  background-color: transparent;
}

.navbar-default .navbar-toggle {
  margin: 10px 0 0 0;
}

.navbar-default .navbar-toggle,
.navbar-default .navbar-toggle:hover,
.navbar-default .navbar-toggle:focus {
  border: none;
  background: #f3f3f3;
}

.navbar-default .navbar-toggle i {
  font-size: 31px;
}

.navbar-default .navbar-collapse {
  float: right;
  border-top: none;
  padding-left: 0;
  padding-right: 0;
}

.navbar-brand img {
  border:1px solid black;
  width:150px;
  height:150px;
  display:block;
  margin: 15px auto 0px auto;
}

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<nav class="navbar navbar-default">
  <div class="container">
    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-navbar-collapse">
      <span class="sr-only">Toggle Navigation</span>
      <i class="fa fa-bars"></i>
    </button>
    <a href="index.php" class="navbar-brand">
      <img src="img/corelogo.png" alt="" height="150" width="150">
    </a>
  </div>
</nav>

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Answer 2

您只需添加display: block;，然后使用margin: 0 auto;

添加自动边距，即可将图片设为块元素

以下是您的代码：.navbar-brand > img { display: block; margin: 0 auto;}

<style>
.navbar {-moz-border-radius: 0;-webkit-border-radius: 0;border-radius: 0;margin-bottom: 0;}
.navbar .container {text-align: center; position: center; background-color: #fff; right:55px;}
.navbar-default {-moz-transition: all 0.3s ease-out;-o-transition: all 0.3s ease-out;-webkit-transition: all 0.3s ease-out;transition: all 0.3s ease-out;width: 100%;border: none;border-bottom: 0px solid #e7e7e7;background-color: #fff; }
.navbar-default .navbar-nav > li > a {color: #000;font-weight: normal;font-size: 15px; display: inline-block; padding-right: 23px; padding-left: 23px}
.navbar-default .navbar-nav > li > a:hover {background-color: transparent;color: #005FA6;}
.navbar-default .navbar-nav > .open > a,.navbar-default .navbar-nav > .open > a:hover,.navbar-default .navbar-nav > .open > a:focus {background-color: transparent;color: #005FA6;}
.navbar-default .navbar-nav .active > a,.navbar-default .navbar-nav .active > a:hover,.navbar-default .navbar-nav .active > a:focus {color: #005FA6;background-color: transparent;}
.navbar-default .navbar-toggle {margin: 10px 0 0;}
.navbar-default .navbar-toggle,.navbar-default .navbar-toggle:hover,.navbar-default .navbar-toggle:focus {border: none;background: #f3f3f3;}
.navbar-default .navbar-toggle i {font-size: 31px;}
.navbar-default .navbar-collapse {float: right; border-top: none;padding-left: 0;padding-right: 0;}
.navbar-brand > img { display: block; margin: 0 auto;}
</style>

<nav class="navbar navbar-default">
  <div class="container">
    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-navbar-collapse">
      <span class="sr-only">Toggle Navigation</span>
      <i class="fa fa-bars"></i>
    </button>
    <a href="index.php" class="navbar-brand">
      <img class="my-image" src="img/corelogo.png" alt="" height="150" width="150">
    </a>
   </div>
</nav>