如何在页面中水平和垂直居中微调器?

FeR*_*cHo 8 html css css-position

我有一个div模拟小微调器的块,一切正常,但是css我的配置位于右上翼,我试图将它居中,但是当我从移动设备上看到它时,它从原地移动..可以在不改变不同尺寸设备中的位置的情况下将其居中吗?

.spinner {
  display: block;
  position: fixed;
  z-index: 1031;
  top: 15px;
  right: 15px;
}
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Lin*_*TED 12

由于它是固定的,因此top|left|right|bottom属性是相对于窗口的。所以一个百分比的位置,在这种情况下 50% 应该可以解决问题。

.spinner {
  display: block;
  position: fixed;
  z-index: 1031; /* High z-index so it is on top of the page */
  top: 50%;
  right: 50%; /* or: left: 50%; */
  margin-top: -..px; /* half of the elements height */
  margin-right: -..px; /* half of the elements widht */
}
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替代方案,由 Utkanos 在评论中给出

.spinner {
  display: block;
  position: fixed;
  z-index: 1031; /* High z-index so it is on top of the page */
  top: calc( 50% - ( ...px / 2) ); /* where ... is the element's height */
  right: calc( 50% - ( ...px / 2) ); /* where ... is the element's width */
}
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  • 或者对于绝对居中,在`left`上使用`calc()`,即`calc(50% - (50px / 2))`,其中50px是元素的宽度。“top”也是如此。 (4认同)

Sti*_*ers 9

如果您希望微调器覆盖整个视口:

.spinner {
  border: 1px solid;
  position: fixed;
  z-index: 1;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 50 50'%3E%3Cpath d='M28.43 6.378C18.27 4.586 8.58 11.37 6.788 21.533c-1.791 10.161 4.994 19.851 15.155 21.643l.707-4.006C14.7 37.768 9.392 30.189 10.794 22.24c1.401-7.95 8.981-13.258 16.93-11.856l.707-4.006z'%3E%3CanimateTransform attributeType='xml' attributeName='transform' type='rotate' from='0 25 25' to='360 25 25' dur='0.6s' repeatCount='indefinite'/%3E%3C/path%3E%3C/svg%3E") center / 50px no-repeat;
}
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<div class="spinner"></div>
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如果您希望它只是 gif/svg 的大小:

.spinner {
  border: 1px solid;
  position: fixed;
  z-index: 1;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 50px;
  height: 50px;
  margin: auto;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 50 50'%3E%3Cpath d='M28.43 6.378C18.27 4.586 8.58 11.37 6.788 21.533c-1.791 10.161 4.994 19.851 15.155 21.643l.707-4.006C14.7 37.768 9.392 30.189 10.794 22.24c1.401-7.95 8.981-13.258 16.93-11.856l.707-4.006z'%3E%3CanimateTransform attributeType='xml' attributeName='transform' type='rotate' from='0 25 25' to='360 25 25' dur='0.6s' repeatCount='indefinite'/%3E%3C/path%3E%3C/svg%3E") center / contain no-repeat;
}
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<div class="spinner"></div>
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Ini*_*han 5

尝试这个来获得所有尺寸的中心位置

.spinner{
    position: absolute;
    margin: auto;
    top:0;
    bottom: 0;
    left: 0;
    right: 0;
}
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Bhu*_*wan 5

只需尝试transform和位置topleft组合...

注意:这里我使用 font-awesome 只是为了演示

.spinner {
  position: fixed;
  z-index: 1031;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
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<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<div class="spinner"><i class="fa fa-spinner fa-spin"></i></div>
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