鼠标悬停的图像：透明框与图像大小不同

Question

我有一些代码在我的图像上添加了透明框的悬停效果，并带有文本叠加层，但是透明框没有对齐图像的大小。透明框似乎要么太小（使下图的顶部和底部不透明）要么太大（导致我的页面完全不对齐）。这可能是盒子大小的问题？我想我已将其设置为自动变为图像大小的 100%，但我可能遗漏了一些东西。

Link 到我的站点：http://jchambliss.aisites.com/imd311/portfolio/sites.html

此处包含必要的代码：

#preview {
  max-width: 100%;
  border-collapse: collapse;
}

#text {
  position: absolute;
  opacity: 0;
  max-width: 100%;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
}

/* Web Design Projects */
.sitesAds {
  position: relative;
  border-collapse: collapse;
}

.sitesAds:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

.sitesTokyo {
  position: relative;
  border-collapse: collapse;
}

.sitesTokyo:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

.sitesMobile {
  position: relative;
  border-collapse: collapse;
}

.sitesMobile:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

.sitesRoux {
  position: relative;
  border-collapse: collapse;
}

.sitesRoux:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

<!DOCTYPE html>
<html>
<head>
<link href="portfolio.css" rel="stylesheet" type="text/css">

    <!--[if lt IE 9]>
        <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js">
        </script>
    <![endif]-->
    
<link href="https://fonts.googleapis.com/css?family=Amita|Encode+Sans+Expanded|Leckerli+One|Merienda+One|Source+Sans+Pro" rel="stylesheet">
</head>

<body>

<div>

<table>
<tr>
   <td><a href="ads.html"><div class="sitesAds"><img src="images/ads.jpg" id="preview" alt="Banner Ads"/>
    <h3 id="text">Banner Ads</h3></div></a>
   </td>
   <td><a href="tokyo.html"><div class="sitesTokyo"><img src="images/tokyo.jpg" id="preview" alt="One Page Ad Site: Tokyo, Japan"/>
    <h3 id="text">One Page Ad Site: Tokyo, Japan</h3></div></a>
   </td>
</tr>
<tr>
   <td><a href="mobile.html"><div class="sitesMobile"><img src="images/mobile.jpg" id="preview" alt="Mobile App: Tea Shoppe"/>
    <h3 id="text">Mobile App: Tea Shoppe</h3></div></a>
   </td>
   <td><a href="roux.html"><div class="sitesRoux"><img src="images/roux.jpg" id="preview" alt="Roux Academy of Art, Media, and Design"/>
    <h3 id="text">Roux Academy of Art, Media, and Design</h3></div></a>
   </td>
</tr>
</table>
 </div>

</body>
</html>

Answer 1

问题出在您的图片尺寸上。你悬停的 div 比图像大。您必须将图像宽度设置为 100%；

.sitesMobile img { width: 100%}

Answer 2

在 img 上使用 width: 100% 而不是 max-width 并从 #text[=21 中删除 padding: 0 =]

make sure you should use unique ids for each h3 element as id cannot be the same on a single page

示例：

.sitesTokyo img {
  width: 100%;
}

#text {
  position: absolute;
  display: flex;
  align-items: center; /* For vertical centering */
  justify-content: center; /* For horizontal centering */
  opacity: 0;
  max-width: 100%;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: 0; /* Remove padding */
  padding: 0; /* Remove margin */
}

另请查看下面的工作片段：

#preview {
  max-width: 100%;
  border-collapse: collapse;
}

#text {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  max-width: 100%;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: 0;
  padding: 0;
}

/* Web Design Projects */
.sitesAds {
  position: relative;
  border-collapse: collapse;
}

.sitesAds:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

.sitesTokyo {
  position: relative;
  border-collapse: collapse;
}

.sitesTokyo:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

.sitesMobile {
  position: relative;
  border-collapse: collapse;
}

.sitesMobile:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

.sitesRoux {
  position: relative;
  border-collapse: collapse;
}

.sitesRoux:hover #text {
  box-sizing: content-box;
  padding: 60px 0;
  opacity: 0.8;
  color: #663366;
  background: #FFFFFF;
  text-decoration: none;
  text-align: center;
  -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms; 
}

<!DOCTYPE html>
<html>
<head>
<link href="portfolio.css" rel="stylesheet" type="text/css">

    <!--[if lt IE 9]>
        <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js">
        </script>
    <![endif]-->
    
<link href="https://fonts.googleapis.com/css?family=Amita|Encode+Sans+Expanded|Leckerli+One|Merienda+One|Source+Sans+Pro" rel="stylesheet">
</head>

<body>

<div>

<table>
<tr>
   <td><a href="ads.html"><div class="sitesAds"><img src="http://placehold.it/200x200" id="preview" alt="Banner Ads"/>
    <h3 id="text">Banner Ads</h3></div></a>
   </td>
   <td><a href="tokyo.html"><div class="sitesTokyo"><img src="http://placehold.it/200x200" id="preview" alt="One Page Ad Site: Tokyo, Japan"/>
    <h3 id="text">One Page Ad Site: Tokyo, Japan</h3></div></a>
   </td>
</tr>
<tr>
   <td><a href="mobile.html"><div class="sitesMobile"><img src="http://placehold.it/200x200" id="preview" alt="Mobile App: Tea Shoppe"/>
    <h3 id="text">Mobile App: Tea Shoppe</h3></div></a>
   </td>
   <td><a href="roux.html"><div class="sitesRoux"><img src="http://placehold.it/200x200" id="preview" alt="Roux Academy of Art, Media, and Design"/>
    <h3 id="text">Roux Academy of Art, Media, and Design</h3></div></a>
   </td>
</tr>
</table>
 </div>

</body>
</html>

希望对您有所帮助！

鼠标悬停的图像：透明框与图像大小不同

Images with Mouseover Hover: Transparent Boxes Not Same Size as Image

html

css

image

transparency

boxsizer