div内的中心装载机

Question

我有这个装载机：

.loader_ajax_small {
  border: 2px solid #f3f3f3 !important;
  border-radius: 50%;
  border-top: 2px solid #2D2D2D !important;
  width: 29px;
  height: 29px;
  -webkit-animation: spin_loader_ajax_small 2s linear infinite;
  animation: spin_loader_ajax_small 2s linear infinite;
}

@-webkit-keyframes spin_loader_ajax_small {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin_loader_ajax_small {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

但我无法理解如何在div中水平居中，例如：

正如你所看到的那样在左边但是我希望它居中，我怎么能这样做？

Answer 1

在margin: 0 auto;中为父级div中心添加了.loader_ajax_small

.loader {
  border: 1px solid #ccc;
  padding: 20px;
}
.loader_ajax_small {
  border: 2px solid #f3f3f3 !important;
  border-radius: 50%;
  border-top: 2px solid #2D2D2D !important;
  width: 29px;
  height: 29px;
  margin: 0 auto;
  -webkit-animation: spin_loader_ajax_small 2s linear infinite;
  animation: spin_loader_ajax_small 2s linear infinite;
}

@-webkit-keyframes spin_loader_ajax_small {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin_loader_ajax_small {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

<div class="loader">
  <div class="loader_ajax_small"></div>
</div>

或display: flex;

.loader {
  border: 1px solid #ccc;
  padding: 20px;
  display: flex;
  justify-content: center;  
}
.loader_ajax_small {
  border: 2px solid #f3f3f3 !important;
  border-radius: 50%;
  border-top: 2px solid #2D2D2D !important;
  width: 29px;
  height: 29px;
  -webkit-animation: spin_loader_ajax_small 2s linear infinite;
  animation: spin_loader_ajax_small 2s linear infinite;
}

@-webkit-keyframes spin_loader_ajax_small {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin_loader_ajax_small {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

<div class="loader">
  <div class="loader_ajax_small"></div>
</div>

Answer 2

在margin:0 auto;属性中添加.loader_ajax_small。

＆＃13;

＆＃13;

.loader_ajax_small {
  border: 2px solid #f3f3f3 !important;
  border-radius: 50%;
  border-top: 2px solid #2D2D2D !important;
  width: 29px;
  height: 29px;
  margin:0 auto;
  -webkit-animation: spin_loader_ajax_small 2s linear infinite;
  animation: spin_loader_ajax_small 2s linear infinite;
}

@-webkit-keyframes spin_loader_ajax_small {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin_loader_ajax_small {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

＆＃13;

<div class="loader_ajax_small"></div>

＆＃13;

＆＃13;

＆＃13;

Answer 3

将您的加载器margin设置为auto 像这样的东西

margin:10px auto;