Question

我正在试图弄清楚如何给出一个半透明的图像叠加（出现在：悬停）CSS3过渡（轻松）。但它不起作用。我不确定是不是因为我遗漏了某些东西，或者转换只是不适用于display属性。 CSS解决方法的任何想法（我不知道JavaScript）？提前谢谢。

相关的HTML和CSS：

<div class="thumbnail">
    <figure>
        <img src="images/dude.jpg" alt=""/>
    </figure>
    <div class="thumbnail-overlay">
        <h2>Project Name</h2>
        <h3> Skills Skills Skills</h3>
        <p>This is a project description.</p>
    </div>
</div>

.thumbnail {
   position:relative;
   float:left;
   width:40%;
   margin:1.5% 1.5% 0 0;
}

.thumbnail-overlay {
   background-color: @dark-gray;
   display:none;
   opacity:.9;
   position:absolute;
   top:0;
   left:0;
   width:100%; height:100%;
   overflow:hidden;
   -webkit-transition:all .3s ease;
   -moz-transition:all .3s ease;
   transition:all.3s ease;
}


.thumbnail:hover .thumbnail-overlay {
   display:block;
}

Answer 1

这可能会对你有所帮助

<div class="tricky"><img class="tricky_image" src="http://distilleryimage11.instagram.com/65c8f832841711e180d51231380fcd7e_7.jpg"></div>

css part：

.tricky {
    display:inline-block;
    max-width:200px; 
    max-height:200px;
    background:red;
}

.tricky_image {
    max-width:200px; 
    max-height:200px;
    -moz-transition: all 1s; 
    -webkit-transition: all 1s;  
    -ms-transition: all 1s;  
    -o-transition: all 1s;  
    transition: all 1s; 
    opacity:1;
    filter:alpha(opacity=100);
}

.tricky_image:hover {
    opacity:0.2;
    filter:alpha(opacity=20);
}

Answer 2

因为我看到它是因为显示属性。 css过渡对它不起作用，这就是你遇到这个问题的原因。

这是我测试过的css代码，工作正常：

.thumbnail .thumbnail-overlay {
background-color: @dark-gray;
display:block;
opacity:0;
position:absolute;
top:0;
left:0;
width:100%; height:100%;
overflow:hidden;
-webkit-transition: all 0.3s ease;
-moz-transition: all 0.3s ease;
transition: all 0.3s ease;
}

.thumbnail:hover .thumbnail-overlay {
opacity: .9;
}

希望它有所帮助!!!

Answer 3

它对我有用。我将CSS分离到另一个文件并将其链接到HTML文件。它对我很有用

HTML

    <head>
        <link rel="stylesheet" type="text/css" href="test.css">
    </head>
    <div class="thumbnail">
        <figure>
            <img src="/home/qbadmin/Downloads/Pic.jpg" alt=""/>
        </figure>
    <div class="thumbnail-overlay">
        <h2>Project Name</h2>
        <h3> Skills Skills Skills</h3>
        <p>This is a project description.</p>
    </div>
</div>

CSS

    .thumbnail {
      position:absolute;
      float:left;
      width:40%;
      left :100 px;
      top :100px;
      margin:1.5% 1.5% 0 0;
      }

     .thumbnail-overlay {
     background-color: @dark-gray;
     display:none;
     opacity:.9;
     position:absolute;
     top:100px;
     left:100px;
     width:100%; height:100%;
     overflow:hidden;
     -webkit-transition:all .3s ease;
     -moz-transition:all .3s ease;
      transition:all.3s ease;
      }

     .thumbnail:hover .thumbnail-overlay {
      display:block;
      opacity: .9;
       }

如何将CSS3过渡添加到图像叠加层？

3 个答案: