我有一个CSS幻灯片,目前左对齐,我试图在页面中居中。以前我有一个幻灯片显示跨越整个页面并且工作正常,但这次图像只占据了页面的一部分,并且在水平和垂直照片之间混合(都具有相同的高度)。如果有人能指导我如何将此幻灯片对齐到我的页面中心,我将不胜感激。我尝试了很多不同的调整,但没有运气。我在下面粘贴我的代码。 提前谢谢。
HTML
#history_slideshow {
padding-top: 1%;
}
.crossfade2>figure {
animation: imageAnimation 27s linear infinite 0s;
backface-visibility: hidden;
color: transparent;
opacity: 0;
position: absolute;
z-index: 0;
margin: 0 auto;
padding-top: 0%;
}
.crossfade2>figure:nth-child(1) {
background-image: url('../photos/history_1.jpg');
background-repeat: no-repeat;
}
.crossfade2>figure:nth-child(2) {
animation-delay:6s;
background-image:url('../photos/history_2.jpg');
background-repeat:no-repeat;
}
.crossfade2>figure:nth-child(3){
animation-delay:12s;
background-image:url('../photos/history_3.jpg');
background-repeat:no-repeat;
}
.crossfade2>figure:nth-child(4) {
animation-delay: 18s;
background-image: url('../photos/history_4.jpg');
background-repeat: no-repeat;
}
@keyframes imageAnimation {
0% {
animation-timing-function:ease-in;
opacity:0;
}
8% {
animation-timing-function:ease-out;
opacity:1;
}
17% {
opacity:1
}
25% {
opacity:0
}
100% {
opacity:0
}
}
<div id="history_slideshow" class="crossfade2">
<figure>
<img src="../photos/history_1.jpg" alt="" />
</figure>
<figure>
<img src="../photos/history_2.jpg" alt="" />
</figure>
<figure>
<img src="../photos/history_3.jpg" alt="" />
</figure>
<figure>
<img src="../photos/history_4.jpg" alt="" />
</figure>
</div>
答案 0 :(得分:0)
我认为你可以通过添加
来集中<div>
margin: 0 auto
width:auto
display : inline-block
使用此答案检查您的代码。
答案 1 :(得分:0)
您可以尝试使用#history_slideshow {
padding-top: 1%;
}
.crossfade2 > figure {
animation: imageAnimation 27s linear infinite 0s;
backface-visibility: hidden;
color: transparent;
opacity: 0;
position: absolute;
z-index: 0;
margin: 0 auto;
padding-top: 0%;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
-webkit-transform: translate(-50%,-50%);
-moz-transform: translate(-50%,-50%);
-o-transform: translate(-50%,-50%);
-ms-transform: translate(-50%,-50%);
}
.crossfade2 > figure:nth-child(1) {
background-image: url('../photos/history_1.jpg');
background-repeat: no-repeat;
}
.crossfade2 > figure:nth-child(2) {
animation-delay:6s;
background-image:url('../photos/history_2.jpg');
background-repeat:no-repeat;
}
.crossfade2 > figure:nth-child(3){
animation-delay:12s;
background-image:url('../photos/history_3.jpg');
background-repeat:no-repeat;
}
.crossfade2 > figure:nth-child(4) {
animation-delay: 18s;
background-image: url('../photos/history_4.jpg');
background-repeat: no-repeat;
}
@keyframes imageAnimation {
0% {
animation-timing-function:ease-in;
opacity:0;
}
8% {
animation-timing-function:ease-out;
opacity:1;
}
17% {
opacity:1
}
25% {
opacity:0
}
100% {
opacity:0
}
}
@-webkit-keyframes imageAnimation {
0% {
animation-timing-function:ease-in;
opacity:0;
}
8% {
animation-timing-function:ease-out;
opacity:1;
}
17% {
opacity:1
}
25% {
opacity:0
}
100% {
opacity:0
}
}
@-moz-keyframes imageAnimation {
0% {
animation-timing-function:ease-in;
opacity:0;
}
8% {
animation-timing-function:ease-out;
opacity:1;
}
17% {
opacity:1
}
25% {
opacity:0
}
100% {
opacity:0
}
}
css
<div id="history_slideshow" class="crossfade2">
<figure>
<img src="../photos/history_1.jpg" alt="" />
</figure>
<figure>
<img src="../photos/history_2.jpg" alt="" />
</figure>
<figure>
<img src="../photos/history_3.jpg" alt="" />
</figure>
<figure>
<img src="../photos/history_4.jpg" alt="" />
</figure>
</div>
use strict; use warnings;
答案 2 :(得分:0)
您可以在父容器上使用display:flex
+ height:100vh
,当整个内容处于绝对位置时,可以使用min-height/min-width
。
align-items
和justify-content
将管理X,Y轴的居中..
#history_slideshow {
padding-top: 1%;
/* update */
display:flex;
align-items:center;
justify-content:center;
height:100vh;
/* could be usefull */
min-height:400px;
min-width:600px;
/* end update */
}
.crossfade2>figure {
animation: imageAnimation 27s linear infinite 0s;
backface-visibility: hidden;
color: transparent;
opacity: 0;
position: absolute;
z-index: 0;
margin: 0 auto;
padding-top: 0%;
}
.crossfade2>figure:nth-child(1) {
background-image: url('http://dummyimage.com/200x400/acd&text=history_1.jpg');
background-repeat: no-repeat;
}
.crossfade2>figure:nth-child(2) {
animation-delay:6s;
background-image:url('http://dummyimage.com/600x400/afd&text=history_2.jpg');
background-repeat:no-repeat;
}
.crossfade2>figure:nth-child(3){
animation-delay:12s;
background-image:url('http://dummyimage.com/200x400/0cd&text=history_3.jpg');
background-repeat:no-repeat;
}
.crossfade2>figure:nth-child(4) {
animation-delay: 18s;
background-image: url('http://dummyimage.com/600x400/456&text=history_4.jpg');
background-repeat: no-repeat;
}
@keyframes imageAnimation {
0% {
animation-timing-function:ease-in;
opacity:0;
}
8% {
animation-timing-function:ease-out;
opacity:1;
}
17% {
opacity:1
}
25% {
opacity:0
}
100% {
opacity:0
}
}
&#13;
<div id="history_slideshow" class="crossfade2">
<figure>
<img src="http://dummyimage.com/200x400/acd&text=history_1.jpg" alt="" />
</figure>
<figure>
<img src="http://dummyimage.com/600x400/afd&text=history_2.jpg" alt="" />
</figure>
<figure>
<img src="http://dummyimage.com/200x400/0cd&text=history_3.jpg" alt="" />
</figure>
<figure>
<img src="http://dummyimage.com/600x400/456&text=history_4.jpg" alt="" />
</figure>
</div>
&#13;
横向居中
您可以在父容器上使用display
+ margin
。
display:table;
会缩小内容大小,然后水平居中的margin:auto
会缩小。
您需要通过position:
absolute
relative
在流程中保留一个数字,以使容器适应图像大小。
#history_slideshow {
padding-top: 1%;
/* update for horizontal centering */
display:table;
margin:auto;
}
.crossfade2>figure:first-of-type {
position:relative;
}
/* end update */
.crossfade2>figure {
animation: imageAnimation 27s linear infinite 0s;
backface-visibility: hidden;
color: transparent;
opacity: 0;
position: absolute;
z-index: 0;
margin: 0 auto;
padding-top: 0%;
}
.crossfade2>figure:nth-child(1) {
background-image: url('http://dummyimage.com/300x200/acd&text=history_1.jpg');
background-repeat: no-repeat;
}
.crossfade2>figure:nth-child(2) {
animation-delay:6s;
background-image:url('http://dummyimage.com/300x200/afd&text=history_2.jpg');
background-repeat:no-repeat;
}
.crossfade2>figure:nth-child(3){
animation-delay:12s;
background-image:url('http://dummyimage.com/300x200/0cd&text=history_3.jpg');
background-repeat:no-repeat;
}
.crossfade2>figure:nth-child(4) {
animation-delay: 18s;
background-image: url('http://dummyimage.com/300x200/456&text=history_4.jpg');
background-repeat: no-repeat;
}
@keyframes imageAnimation {
0% {
animation-timing-function:ease-in;
opacity:0;
}
8% {
animation-timing-function:ease-out;
opacity:1;
}
17% {
opacity:1
}
25% {
opacity:0
}
100% {
opacity:0
}
}
&#13;
<div id="history_slideshow" class="crossfade2">
<figure>
<img src="http://dummyimage.com/300x200/acd&text=history_1.jpg" alt="" />
</figure>
<figure>
<img src="http://dummyimage.com/300x200/afd&text=history_2.jpg" alt="" />
</figure>
<figure>
<img src="http://dummyimage.com/300x200/0cd&text=history_3.jpg" alt="" />
</figure>
<figure>
<img src="http://dummyimage.com/300x200/456&text=history_4.jpg" alt="" />
</figure>
</div>
&#13;