背景图像转换在Safari中不工作

Question

在悬停时，我试图使用CSS过渡来交换背景图像。然而，在Safari中，图像在动画过程中缩小，我不确定为什么。

.icon {
  background-color: white;
  width: 100px;
  height: 100px;
  background-image: url(data:image/svg+xml;base64,PHN2ZyBpZD0iTGF5ZXJfMSIgZGF0YS1uYW1lPSJMYXllciAxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCA4MS44OSA4MS44OSI+PGRlZnM+PHN0eWxlPi5jbHMtMXtmaWxsOm5vbmU7c3Ryb2tlOiM4YjkyYTE7c3Ryb2tlLW1pdGVybGltaXQ6MTA7c3Ryb2tlLXdpZHRoOjZweDt9PC9zdHlsZT48L2RlZnM+PHRpdGxlPmljb24tc2VhcmNoPC90aXRsZT48Y2lyY2xlIGNsYXNzPSJjbHMtMSIgY3g9IjM1LjU5IiBjeT0iMzUuNTkiIHI9IjMyLjU5Ii8+PGxpbmUgY2xhc3M9ImNscy0xIiB4MT0iNTguNjMiIHkxPSI1OC42MyIgeDI9Ijc5Ljc3IiB5Mj0iNzkuNzciLz48L3N2Zz4=);
  background-size: 14px 14px;
  background-repeat: no-repeat;
  transition: all 1s;
}
.icon:hover {
    background-image: url(data:image/svg+xml;base64,PHN2ZyBpZD0iTGF5ZXJfMSIgZGF0YS1uYW1lPSJMYXllciAxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCA4MS44OSA4MS44OSI+PGRlZnM+PHN0eWxlPi5jbHMtMXtmaWxsOm5vbmU7c3Ryb2tlOiM1YTJhODI7c3Ryb2tlLW1pdGVybGltaXQ6MTA7c3Ryb2tlLXdpZHRoOjZweDt9PC9zdHlsZT48L2RlZnM+PHRpdGxlPmljb24tc2VhcmNoLXB1cnBsZTwvdGl0bGU+PGNpcmNsZSBjbGFzcz0iY2xzLTEiIGN4PSIzNS41OSIgY3k9IjM1LjU5IiByPSIzMi41OSIvPjxsaW5lIGNsYXNzPSJjbHMtMSIgeDE9IjU4LjYzIiB5MT0iNTguNjMiIHgyPSI3OS43NyIgeTI9Ijc5Ljc3Ii8+PC9zdmc+);
 }

https://jsfiddle.net/Lfqucz82/

Answer 1

虽然我不知道为什么Safari会这样做，如果你想在悬停时交叉渐变图标，在:after和:before伪选择器不透明度上工作。试试这样做:https://jsfiddle.net/ifthenelse/6s9g4kdn/

你的CSS应该是这样的:

/* Icon container */
.icon {
  position: relative;
  background-color: white;
  width: 100px;
  height: 100px;
}
/* Images containers */
.icon:before, .icon:after {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  content: "";
  display: block;
  background-size: 14px 14px;
  background-repeat: no-repeat;
  transition: opacity 1s;
}
/* Attach backgrounds */
.icon:before {
  background-image: url(data:image/svg+xml;base64,PHN2ZyBpZD0iTGF5ZXJfMSIgZGF0YS1uYW1lPSJMYXllciAxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCA4MS44OSA4MS44OSI+PGRlZnM+PHN0eWxlPi5jbHMtMXtmaWxsOm5vbmU7c3Ryb2tlOiM4YjkyYTE7c3Ryb2tlLW1pdGVybGltaXQ6MTA7c3Ryb2tlLXdpZHRoOjZweDt9PC9zdHlsZT48L2RlZnM+PHRpdGxlPmljb24tc2VhcmNoPC90aXRsZT48Y2lyY2xlIGNsYXNzPSJjbHMtMSIgY3g9IjM1LjU5IiBjeT0iMzUuNTkiIHI9IjMyLjU5Ii8+PGxpbmUgY2xhc3M9ImNscy0xIiB4MT0iNTguNjMiIHkxPSI1OC42MyIgeDI9Ijc5Ljc3IiB5Mj0iNzkuNzciLz48L3N2Zz4=);
  opacity: 1;
}
.icon:after {
  background-image: url(data:image/svg+xml;base64,PHN2ZyBpZD0iTGF5ZXJfMSIgZGF0YS1uYW1lPSJMYXllciAxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCA4MS44OSA4MS44OSI+PGRlZnM+PHN0eWxlPi5jbHMtMXtmaWxsOm5vbmU7c3Ryb2tlOiM1YTJhODI7c3Ryb2tlLW1pdGVybGltaXQ6MTA7c3Ryb2tlLXdpZHRoOjZweDt9PC9zdHlsZT48L2RlZnM+PHRpdGxlPmljb24tc2VhcmNoLXB1cnBsZTwvdGl0bGU+PGNpcmNsZSBjbGFzcz0iY2xzLTEiIGN4PSIzNS41OSIgY3k9IjM1LjU5IiByPSIzMi41OSIvPjxsaW5lIGNsYXNzPSJjbHMtMSIgeDE9IjU4LjYzIiB5MT0iNTguNjMiIHgyPSI3OS43NyIgeTI9Ijc5Ljc3Ii8+PC9zdmc+);
  opacity: 0;
}
/* Transition on hover */
.icon:hover:before {
  opacity: 0;
}
.icon:hover:after {
  opacity: 1;
}

Answer 2

如果出现的图像(在悬停之前和期间)不具有相同的大小，则由于设置了background-size: 14px 14px;，其中一个图像(在您的情况下，是第一个图像)将显示为完全大小，而另一个图像可能看起来调整了大小(扩展或缩小)。

1. 检查图像的大小。(如果它们不一样，那么定义你需要的完美的css background-size属性2. 为了使过渡完美(在所有浏览器中);浏览器版本)，do

.icon{
    //other css codes;
    transition: 1s;
    -o-transition: 1s;
    -ms-transition: 1s;
    -moz-transition: 1s;
    -webkit-transition: 1s;
}