如何在一个div元素水平中心图像?

我怎么能居中对齐(水平)一个图像内的容器div?

这里是HTML和CSS。我还为缩略图的其他元素添加了CSS。它以降序运行，所以最高的元素是所有元素的容器，最低的元素是所有元素的内部。

#thumbnailwrapper { color: #2A2A2A; margin-right: 5px; border-radius: 0.2em; margin-bottom: 5px; background-color: #E9F7FE; padding: 5px; border: thin solid #DADADA; font-size: 15px } #artiststhumbnail { width: 120px; height: 108px; overflow: hidden; border: thin solid #DADADA; background-color: white; } #artiststhumbnail:hover { left: 50px }  <a href="NotByDesign"> <div id="thumbnailwrapper"> <a href="NotByDesign">  <b>Not By Design</b> <br> <div id="artiststhumbnail"> <a href="NotByDesign">  <img src="../files/noprofile.jpg" height="100%" alt="Not By Design" border="1" /> </a> </div> <div id="genre">Punk</div> </div>

好的，我已经添加了没有PHP的标记，所以应该更容易看到。这两种解决方案在实践中似乎都行不通。顶部和底部的文本不能居中，图像应该在其容器div中居中。容器有溢出隐藏，所以我想看到图像的中心，因为这通常是焦点所在。

当前回答

##Both Vertically and Horizontally center of the Page
.box{
    width: 300px;
    height: 300px;
    background-color: #232532;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}

2018-02-15 11:49:20

其他回答

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">


      <style>
      body{
  /*-------------------important for fluid images---\/--*/
  overflow-x: hidden; /* some browsers shows it for mysterious reasons to me*/
  overflow-y: scroll;
  margin-left:0px;
  margin-top:0px;
  /*-------------------important for fluid images---/\--*/
      }
      .thirddiv{
      float:left;
      width:100vw;
      height:100vh;
      margin:0px;
      background:olive;
      }
      .thirdclassclassone{
      float:left;   /*important*/
      background:grey;
      width:80vw;
      height:80vh; /*match with img height bellow*/
      margin-left:10vw; /* 100vw minus "width"/2    */
      margin-right:10vw; /* 100vw minus "width"/2   */
      margin-top:10vh;
      }
      .thirdclassclassone img{
      position:relative; /*important*/
     display: block;  /*important*/
    margin-left: auto;  /*very important*/
    margin-right: auto;  /*very important*/
    height:80vh; /*match with parent div above*/

    /*--------------------------------
    margin-top:5vh;
    margin-bottom:5vh;
    ---------------------------------*/
    /*---------------------set margins to match total  height of parent di----------------------------------------*/
      }
    </style>           
</head>  
<body>
    <div class="thirddiv">
       <div class="thirdclassclassone">
       <img src="ireland.png">
    </div>      
</body>
</html>

2016-04-17 15:59:02

使用下面的css命令将图像居中。你必须在图像一开始就给出宽度。

img{
  width: 300px;
  position: fixed;
  left0;
  right:0;

}

2021-11-23 14:33:35

CSS flexbox可以用图像父元素的justify-content: center来实现。为了保持图像的纵横比，添加align-self: flex-start;到它。

HTML

<div class="image-container">
  <img src="http://placehold.it/100x100" />
</div>

CSS

.image-container {
  display: flex;
  justify-content: center;
}

输出:

body { background: lightgray; } .image-container { width: 200px; display: flex; justify-content: center; margin: 10px; padding: 10px; /* Material design properties */ background: #fff; box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 1px 5px 0 rgba(0, 0, 0, 0.12); } .image-2 { width: 500px; align-self: flex-start; /* to preserve image aspect ratio */ } .image-3 { width: 300px; align-self: flex-start; /* to preserve image aspect ratio */ } <div class="image-container"> <img src="http://placehold.it/100x100" /> </div> <div class="image-container image-2"> <img src="http://placehold.it/100x100/333" /> </div> <div class="image-container image-3"> <img src="http://placehold.it/100x100/666" /> </div>

2015-12-10 13:04:37

添加到你的CSS:

#artiststhumbnail a img {
   display: block;
   margin-left: auto;
   margin-right: auto;
}

只是引用了一个子元素，在这个例子中就是图像。

2016-01-17 20:32:47

这个也可以

#imagewrapper {
    text-align:center;
}

#imagewrapper img {
    display:inline-block;
    margin:0 5px;
}

2014-10-06 11:13:26

如何在一个div元素水平中心图像?

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