我尝试使用CSS和HTML动画单个单词。我想让这个词淡入,保持可见然后消失,然后我想继续下一个字。
我遵循了本教程(http://tympanus.net/codrops/2012/04/17/rotating-words-with-css-animations),但问题是我无法理解如何在@keyframes动画中设置持续时间的百分比,因为在本教程中它只是写的:
我们的动画将运行一个周期,这意味着每个跨度将显示一次,持续三秒,因此延迟值。整个动画将运行6(图像数量)* 3(出现时间)= 18秒。我们需要为不透明度值设置正确的百分比(或者显示跨度的任何值)。将6乘以18得到0.333 ......对于我们的关键帧步骤,这将是33%。我们想要发生的所有事情都需要在此之前发生。因此,在调整并查看最适合的内容后,我们会为第一个单词
提供以下动画
在我的情况下,我的整个动画是16s长(因为我有4个单词* 4s),所以4/16 = 0,25,这就是为什么一切都需要在25%之前发生。
这是我的动画代码:
@keyframes rotateWord {
0% { opacity: 0; }
2% { opacity: 0; -webkit-transform: translateX(0px); transform: translateX(0px); }
5% { opacity: 1; -webkit-transform: translateX(0px); transform: translateX(0px);}
17% { opacity: 1; -webkit-transform: translateX(0px); transform: translateX(0px); }
20% { opacity: 0; -webkit-transform: translateX(00px); transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
这是一个完整的演示:
.rw-words-1 span{
position: absolute;
opacity: 0;
overflow: hidden;
-webkit-animation: rotateWord 16s linear infinite 0s;
-ms-animation: rotateWord 16s linear infinite 0s;
animation: rotateWord 16s linear infinite 0s;
}
.rw-words-1 span:nth-child(2) {
-webkit-animation-delay: 4s;
-ms-animation-delay: 4s;
animation-delay: 4s;
}
.rw-words-1 span:nth-child(3) {
-webkit-animation-delay: 8s;
-ms-animation-delay: 8s;
animation-delay: 8s;
}
.rw-words-1 span:nth-child(4) {
-webkit-animation-delay: 12s;
-ms-animation-delay: 12s;
animation-delay: 12s;
}
@-webkit-keyframes rotateWord {
0% { opacity: 0; }
2% { opacity: 0; -webkit-transform: translateX(0px); }
5% { opacity: 1; -webkit-transform: translateX(0px);}
17% { opacity: 1; -webkit-transform: translateX(0px); }
20% { opacity: 0; -webkit-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
@-ms-keyframes rotateWord {
0% { opacity: 0; }
2% { opacity: 0; -ms-transform: translateX(0px); }
5% { opacity: 1; -ms-transform: translateX(0px);}
17% { opacity: 1; -ms-transform: translateX(0px); }
20% { opacity: 0; -ms-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
@keyframes rotateWord {
0% { opacity: 0; }
2% { opacity: 0; -webkit-transform: translateX(0px); transform: translateX(0px); }
5% { opacity: 1; -webkit-transform: translateX(0px); transform: translateX(0px);}
17% { opacity: 1; -webkit-transform: translateX(0px); transform: translateX(0px); }
20% { opacity: 0; -webkit-transform: translateX(00px); transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}

<div class="rw-words rw-words-1">
<span>Word 1</span>
<span>Word 2</span>
<span>Word 3</span>
<span>Word 4</span>
</div>
&#13;
JSFiddle:https://jsfiddle.net/wx8r5kj7/
所以我的问题是如何正确设置@keyframes动画的百分比。
答案 0 :(得分:0)
如果要在前25%完成动画,并且您不希望单词完全透明太长时间,只需减少不透明度为0的时间段。
在您的代码段中,不透明度为0,从0%到2%,从20%到25%,或总共1.12秒。我将其改为仅24%至25%,或约0.16秒。
.rw-words-1 span{
position: absolute;
opacity: 0;
overflow: hidden;
-webkit-animation: rotateWord 16s linear infinite 0s;
-ms-animation: rotateWord 16s linear infinite 0s;
animation: rotateWord 16s linear infinite 0s;
}
.rw-words-1 span:nth-child(2) {
-webkit-animation-delay: 4s;
-ms-animation-delay: 4s;
animation-delay: 4s;
}
.rw-words-1 span:nth-child(3) {
-webkit-animation-delay: 8s;
-ms-animation-delay: 8s;
animation-delay: 8s;
}
.rw-words-1 span:nth-child(4) {
-webkit-animation-delay: 12s;
-ms-animation-delay: 12s;
animation-delay: 12s;
}
@-webkit-keyframes rotateWord {
0% { opacity: 0; -webkit-transform: translateX(0px); }
3% { opacity: 1; -webkit-transform: translateX(0px);}
21% { opacity: 1; -webkit-transform: translateX(0px); }
24% { opacity: 0; -webkit-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
@-ms-keyframes rotateWord {
0% { opacity: 0; -ms-transform: translateX(0px); }
3% { opacity: 1; -ms-transform: translateX(0px);}
21% { opacity: 1; -ms-transform: translateX(0px); }
24% { opacity: 0; -ms-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
@keyframes rotateWord {
0% { opacity: 0; -webkit-transform: translateX(0px); transform: translateX(0px); }
3% { opacity: 1; -webkit-transform: translateX(0px); transform: translateX(0px);}
21% { opacity: 1; -webkit-transform: translateX(0px); transform: translateX(0px); }
24% { opacity: 0; -webkit-transform: translateX(00px); transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
&#13;
<div class="rw-words rw-words-1">
<span>Word 1</span>
<span>Word 2</span>
<span>Word 3</span>
<span>Word 4</span>
</div>
&#13;
这是你想要的吗?