我是一名平面设计师，只是在学习SVG动画图标和编码。我在插图画家中说明了一杯咖啡，然后将其导出为SVG文件。我试图让蒸汽动画，使它像真正的蒸汽一样升起。问题是，即使我在CSS中选择了.steam1 .st1，它也没有动画。我可能只是对我一直在关注的教程数量感到困惑。有人可以查看我的HTML代码以获取插图，并帮助我使用基于此代码的CSS http://codepen.io/anon/pen/DLmCn
正确地为其设置动画以下是我在HTML http://codepen.io/anon/pen/niHCA
中的SVG代码<body>
<?xml version="1.0" encoding="utf-8"?>
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<g class="steam2">
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</svg>
<script type=”text/javascript” src=”prefixfree.min.js”></script>
</body>
答案 0 :(得分：6)
以下是基于代码的快速起点：http://codepen.io/anon/pen/rAdom?editors=101
首先，定义动画的关键帧：
@keyframes steaming {
0% {
transform: translateY(0px);
opacity: 0;
}
50% { opacity: 1; }
100% {
transform: translateY(-10px);
opacity: 0;
}
}
@-webkit-keyframes {
...
}
蒸汽将从不可见（不透明度：0）开始，然后淡入（不透明度：1）并在向上移动时退出，由translateY（-10px）确定。请注意，像素值是根据SVG视图框和高度/宽度值缩放的。
然后，使用您设置的类将这些关键帧应用于每个Steam SVG元素：
.steam1{
-webkit-animation: steaming 7s linear infinite;
-moz-animation: steaming 7s linear infinite;
animation: steaming 7s linear infinite;
}
您可以调整动画速度，使其看起来更好。