Question

我一直在尝试创建一个基于CSS3动画的滑块，我对动画和关键帧背后的逻辑感到困惑。

这就是我所做的：http://jsfiddle.net/fatgamer85/LzGR7

我为滑块和滑块容器内的另一个容器创建了一个容器，用于存放div或图像。在这种情况下，我决定为启动器添加一些图像。

<div class="slider">
    <div class="slide"><span class="image"></span></div>
    <div class="slide"><span class="image"></span></div>
    <div class="slide"><span class="image"></span></div>
    <div class="slide"><span class="image"></span></div>
    <div class="slide"><span class="image"></span></div>
</div>

然后使用CSS我绝对定位了这些容器和图像。

*, body, html{
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.slider{
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
}

.slide{
    position: absolute;
    width: 100%;
    height: 100%;
}

.slide .image{
    float: left;
    position: absolute;
}

然后我继续将动画规则添加到.slide类

.slide
{
     animation: myanimation 48s ease-in-out infinite;
    -webkit-animation: myanimation 48s ease-in-out infinite;
    -o-animation: myanimation 48s ease-in-out infinite;
    -moz-animation: myanimation 48s ease-in-out infinite;
    -ms-animation: myanimation 48s ease-in-out infinite;
}

使用nth-child伪类分别为每个类添加动画规则。

我观察到图像的显示顺序错误，因此我将z-index分别添加到这些类

中

.slide:nth-child(1){
animation-delay: 0s;
-webkit-animation-delay: 0s;    
-moz-animation-delay: 0s;
-o-animation-delay: 0s; 
-ms-animation-delay: 0s;
z-index:1;
}
.slide:nth-child(2){
animation-delay: 8s;
-webkit-animation-delay: 8s;    
-moz-animation-delay: 8s;
-o-animation-delay: 8s; 
-ms-animation-delay: 8s;
    z-index:2;
}

..... and so on...

并开始将图像添加到范围

.slide:nth-child(1) .image {
    background-image: url('http://i.imgur.com/9yvKmZY.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

.slide:nth-child(2) .image {
    background-image: url('http://i.imgur.com/j8mBdLD.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

..... and so on...

最后添加了关键帧规则

@-webkit-keyframes myanimation {
    0%{
        opacity: 1;
    }
    25% {
        opacity: 0;
    }
}

一切看起来都很精致但是......但是当Image开始制作动画时问题就出现了。我还没有完全掌握动画的概念，我想......

因此，幻灯片以自己的思维为动力。有时它甚至不会显示图像的正确顺序，也不会完全跳过图像。

有谁能告诉我我做错了什么或我哪里出错了？

以下是滑块的全屏示例：http://fiddle.jshell.net/fatgamer85/LzGR7/23/show/light/

Answer 1

如果您不了解幻灯片，有一件事会让您失去很多时间。

如果您将动画推迟到将来，第一个cicle与其他cicle不同。大多数元素都具有来自静态属性的属性，而不是来自动画。

为了避免这种问题，请将动画延迟设置为过去。这样，第一个动画周期就等于其他动画周期。

另外，给自己一些帮助很好。在这种情况下，我在幻灯片的左侧设置了数字。通过这种方式，您可以看到真正发生的事情。

此外，我已经修改了一些关键帧，但是在webkit中错误的是。

CSS

*, body, html{
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.slider{
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
}

.slide{
    position: absolute;
    width: 100%;
    height: 100%;
    animation: myanimation 48s ease-in-out infinite;
    -webkit-animation: myanimation 48s ease-in-out infinite;
    -o-animation: myanimation 48s ease-in-out infinite;
    -moz-animation: myanimation 48s ease-in-out infinite;
    -ms-animation: myanimation 48s ease-in-out infinite;
    font-size: 100px;
    color: red;
}

.slide .image{
    float: left;
    position: absolute;
}

.slide:nth-child(1){
    animation-delay: 0s;
    -webkit-animation-delay: 0s;    
    -moz-animation-delay: 0s;
    -o-animation-delay: 0s; 
    -ms-animation-delay: 0s;
    z-index:5;
}
.slide:nth-child(2){
    animation-delay: -40s;
    -webkit-animation-delay: -40s;  
    -moz-animation-delay: -40s;
    -o-animation-delay: -40s;   
    -ms-animation-delay: -40s;
    z-index:4;
}
.slide:nth-child(3){
    animation-delay: -30s;
    -webkit-animation-delay: -30s;  
    -moz-animation-delay: -30s;
    -o-animation-delay: -30s;   
    -ms-animation-delay: -30s;  
    z-index:3;
}
.slide:nth-child(4){
    animation-delay: -20s;
    -webkit-animation-delay: -20s;  
    -moz-animation-delay: -20s;
    -o-animation-delay: -20s;   
    -ms-animation-delay: -20s;  
    z-index:2;
}
.slide:nth-child(5){
    animation-delay: -10s;
    -webkit-animation-delay: -10s;  
    -moz-animation-delay: -10s;
    -o-animation-delay: -10s;   
    -ms-animation-delay: -10s;
    z-index:1;
}

@keyframes myanimation {
    0%{ opacity: 0; }
    5%{opacity: 1; }
    20%{opacity: 1; }
    25% {opacity: 0;}
    100% {opacity: 0;}
}

@-webkit-keyframes myanimation {
    0%{ opacity: 0; }
    5%{opacity: 1; }
    20%{opacity: 1; }
    25% {opacity: 0;}
    100% {opacity: 0;}
}
@-o-keyframes myanimation {
    0%{ opacity: 1; }
    25% { opacity: 0.75; }
    50%{ opacity: 0.5; }
    75% { opacity: 0.25; }
    100%{ opacity: 0; }
}
@-moz-keyframes myanimation {
    0%{ opacity: 1; }
    25% { opacity: 0.75; }
    50%{ opacity: 0.5; }
    75% { opacity: 0.25; }
    100%{ opacity: 0; }
}
@-ms-keyframes myanimation {
    0%{ opacity: 0; }
    5%{opacity: 1; }
    20%{opacity: 1; }
    25% {opacity: 0;}
    100% {opacity: 0;}
}

@-webkit-keyframes myanimation {
    0%{ opacity: 0; }
    5%{opacity: 1; }
    20%{opacity: 1; }
    25% {opacity: 0;}
    100% {opacity: 0;}
}
.slide:nth-child(1) .image {
    background-image: url('http://i.imgur.com/9yvKmZY.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}
.slide:nth-child(2) .image {
    background-image: url('http://i.imgur.com/j8mBdLD.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}
.slide:nth-child(3) .image {
    background-image: url('http://i.imgur.com/9VdDjQi.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}
.slide:nth-child(4) .image {
    background-image: url('http://i.imgur.com/dqCWOgW.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}
.slide:nth-child(5) .image {
    background-repeat: no-repeat;
    background-image: url('http://i.imgur.com/0hUMMuT.jpg');
    background-size: cover;
}

corrected demo

快乐的编码！

在上面的演示中，第5张图像在动画开始时会显示一点时间。这可以通过调整关键帧来纠正：

@keyframes myanimation {
 0%{opacity: 1; }
    15%{opacity: 1; }
    20%{opacity: 0; }
95% {opacity: 0;}
   100% {opacity: 1;}
}

如果你用一张纸画出来，你会明白为什么;但很难解释

new demo

关于你的小提琴，你犯2个错误。问题在于你认为条形图在某种程度上“在框架内部”，并且与“时间”相关联。这不是真的，你正在使用一个40秒的循环，并且该栏必须使用该动画时间（不是9秒，帧数在这9秒的分数中）。

你最好的选择是只有1巴，并让它骑得更快（10秒）。

CSS

*, body, html{
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.slider{
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 400px;
}

.slide{
    position: absolute;
    width: 100%;
    height: 100%;
    animation: bg_anim 50s ease-in-out infinite;
    -webkit-animation: bg_anim 50s ease-in-out infinite;
    -o-animation: bg_anim 50s ease-in-out infinite;
    -moz-animation: bg_anim 50s ease-in-out infinite;
    -ms-animation: bg_anim 50s ease-in-out infinite;
}

.slide .image{
    float: left;
    position: absolute;
}

.slide:nth-child(1){
    animation-delay: 0s;
    -webkit-animation-delay: 0s;    
    -moz-animation-delay: 0s;
    -o-animation-delay: 0s; 
    -ms-animation-delay: 0s;
    z-index:5;
}
.slide:nth-child(2){
    animation-delay: -40s;
    -webkit-animation-delay: -40s;  
    -moz-animation-delay: -40s;
    -o-animation-delay: -40s;   
    -ms-animation-delay: -40s;
    z-index:4;
}
.slide:nth-child(3){
    animation-delay: -30s;
    -webkit-animation-delay: -30s;  
    -moz-animation-delay: -30s;
    -o-animation-delay: -30s;   
    -ms-animation-delay: -30s;  
    z-index:3;
}
.slide:nth-child(4){
    animation-delay: -20s;
    -webkit-animation-delay: -20s;  
    -moz-animation-delay: -20s;
    -o-animation-delay: -20s;   
    -ms-animation-delay: -20s;  
    z-index:2;
}
.slide:nth-child(5){
    animation-delay: -10s;
    -webkit-animation-delay: -10s;  
    -moz-animation-delay: -10s;
    -o-animation-delay: -10s;   
    -ms-animation-delay: -10s;
    z-index:1;
}

.text{
    right: 0px;
    color: #fff;
    font-size: 28px; 
    float: right;
    z-index:1;
}

.text:nth-child(1){
    z-index:5;  
}

.text:nth-child(2){
    z-index:4;  
}

.text:nth-child(3){
    z-index:3;  
}

.text:nth-child(4){
    z-index:2;  
}

.text:nth-child(5){
    z-index:1;  
}


.bar{
    position: absolute;
    width: 45%;
    height: 400px;
    right: -20px;
    float: right;
    z-index: 99;
    animation: bar_anim 10s infinite ease-in-out;
    -webkit-animation: bar_anim 10s infinite ease-in-out;
    -o-animation: bar_anim 10s infinite ease-in-out;
    -moz-animation: bar_anim 10s infinite ease-in-out;
    -ms-animation: bar_anim 10s infinite ease-in-out;
    animation-delay: -1.5s;
    -webkit-animation-delay: -1.5s; 
    -moz-animation-delay: -1.5s;
    -o-animation-delay: -1.5s;  
    -ms-animation-delay: -1.5s;
}

.slide:nth-child(1) > .bar{
    animation-delay: 0s;
    -webkit-animation-delay: 0s;    
    -moz-animation-delay: 0s;
    -o-animation-delay: 0s; 
    -ms-animation-delay: 0s;
}

.slide:nth-child(2) > .bar{
    animation-delay: -7.2s;
    -webkit-animation-delay: -7.2s; 
    -moz-animation-delay: -7.2s;
    -o-animation-delay: -7.2s;  
    -ms-animation-delay: -7.2s;
    z-index:4;
}

.slide:nth-child(3) > .bar{
    animation-delay: -5.4s;
    -webkit-animation-delay: -5.4s; 
    -moz-animation-delay: -5.4s;
    -o-animation-delay: -5.4s;  
    -ms-animation-delay: -5.4s;
    z-index:3;
}

.slide:nth-child(4) > .bar{
    animation-delay: -3.6s;
    -webkit-animation-delay: -3.6s; 
    -moz-animation-delay: -3.6s;
    -o-animation-delay: -3.6s;  
    -ms-animation-delay: -3.6s;
    z-index:2;
}

.slide:nth-child(5) > .bar{
    animation-delay: -1.8s;
    -webkit-animation-delay: -1.8s; 
    -moz-animation-delay: -1.8s;
    -o-animation-delay: -1.8s;  
    -ms-animation-delay: -1.8s;
    z-index:1;
}

@keyframes bar_anim {
    0%   {  right: -4000px; }
    10%  { right: 0px;  }
    15%  { right: -20px;}
    80%  { right: -20px;}
    95%  { right: 0px;  }
    100% { right: -4000px; }
}
@-o-keyframes bar_anim {
    0%{ right: -4000px; }
    10%{        right: 0px; }
    15%{        right: -20px;   }
    80% {       right: -20px;   }
    95% {       right: 0px; }
    100% {      right: -4000px; }
}
@-moz-keyframes bar_anim {
    0%{         right: -4000px; }
    10%{        right: 0px; }
    15%{        right: -20px;   }
    80% {       right: -20px;   }
    95% {       right: 0px; }
    100% {      right: -4000px; }
}
@-ms-keyframes bar_anim {
    0%{         right: -4000px; }
    10%{        right: 0px; }
    15%{        right: -20px;   }
    80% {       right: -20px;   }
    95% {       right: 0px; }
    100% {      right: -4000px; }
}
@-webkit-keyframes bar_anim {
    0%{         right: -4000px; }
    10%{        right: 0px; }
    15%{        right: -20px;   }
    80% {       right: -20px;   }
    95% {       right: 0px; }
    100% {      right: -4000px; }
}

@keyframes bg_anim {
    0%{         opacity: 1; }
    15%{
        opacity: 1;
    }
    20%{
        opacity: 0;
    }
    95% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@-webkit-keyframes bg_anim {
    0%{
        opacity: 1;
    }
    15%{
        opacity: 1;
    }
    20%{
        opacity: 0;
    }
    95% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@-o-keyframes bg_anim {
    0%{
        opacity: 1;
    }
    15%{
        opacity: 1;
    }
    20%{
        opacity: 0;
    }
    95% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@-moz-keyframes bg_anim {
    0%{
        opacity: 1;
    }
    15%{
        opacity: 1;
    }
    20%{
        opacity: 0;
    }
    95% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@-ms-keyframes bg_anim {
    0%{
        opacity: 1;
    }
    15%{
        opacity: 1;
    }
    20%{
        opacity: 0;
    }
    95% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

或者，如果需要，为每张幻灯片设置1个跨度，但随后保持动画时间和延迟。

Answer 2

根据您的代码，您已正确掌握动画（关键帧）。我认为问题在于z-index，你应该删除它。你错过了关于幻灯片nth-child的一个小细节。您必须将nth-childs不透明度设置为0.我会将理解留给您：）

.slide:nth-child(3){
    animation-delay: 16s;
    -webkit-animation-delay: 16s;   
    -moz-animation-delay: 16s;
    -o-animation-delay: 16s;    
    -ms-animation-delay: 16s;   
    opacity:0;
}

CSS3幻灯片动画问题

2 个答案: