javascript - 中间有图像的 css 加载器

Question

我有我的加载程序的下一个代码，与 w3school 相同。

CSS:

#loader {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  width: 150px;
  height: 150px;
  margin: -75px 0 0 -75px;
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 120px;
  height: 120px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

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

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

/* Add animation to "page content" */
.animate-bottom {
  position: relative;
  -webkit-animation-name: animatebottom;
  -webkit-animation-duration: 1s;
  animation-name: animatebottom;
  animation-duration: 1s
}

@-webkit-keyframes animatebottom {
  from { bottom:-100px; opacity:0 }
  to { bottom:0px; opacity:1 }
}

@keyframes animatebottom {
  from{ bottom:-100px; opacity:0 }
  to{ bottom:0; opacity:1 }
}

但是如果我放置一个图像，图像会像 css 动画一样旋转，我想要一个图像位于加载器的中心。

我在另一个 div 中使用背景图像不起作用。

这是我的fiddle

Answer 1

从 #loader_upload2 中删除 Border 属性并在其中添加 background。

Your Working Fiddle

#loader_upload2 {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  width: 190px;
  height: 190px;
  margin: -75px 0 0 -75px;

  border-radius: 50%;

  width: 140px;
  height: 140px;
background: url('https://crunchbase-production-res.cloudinary.com/image/upload/c_pad,h_140,w_140/v1401689124/y1awpmexi2tf9l7eqnyg.jpg');
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

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

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

/* Add animation to "page content" */
.animate-bottom {
  position: relative;
  -webkit-animation-name: animatebottom;
  -webkit-animation-duration: 1s;
  animation-name: animatebottom;
  animation-duration: 1s
}

@-webkit-keyframes animatebottom {
  from { bottom:-100px; opacity:0 }
  to { bottom:0px; opacity:1 }
}

@keyframes animatebottom {
  from{ bottom:-100px; opacity:0 }
  to{ bottom:0; opacity:1 }
}