与透明背景infront的文本图象

Question

HTML

---

<article id="articlebottom">
    <div class="products">
        <div class="imgWrap">
            <img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTA1uJ8WQ7fiJ2cbdoMph39XIJYQztt6FWoxfkk32gwnOz0qcmjyg" alt="candle" />
            <p class="imgDescription">Camphor</p>
        </div>
        <div class="imgWrap">
            <img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTA1uJ8WQ7fiJ2cbdoMph39XIJYQztt6FWoxfkk32gwnOz0qcmjyg" alt="candle" />
            <p class="imgDescription">Camphor</p>
        </div>
        <div class="imgWrap">
            <img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTA1uJ8WQ7fiJ2cbdoMph39XIJYQztt6FWoxfkk32gwnOz0qcmjyg" alt="candle" />
            <p class="imgDescription">Camphor</p>
        </div>
    </div>
</article>

CSS

#articlebottom {

    width: 980px;
    height: 300px;          
}

.products
{
    width:980px;
    margin:0px auto;
    padding-left:20px;


} 
#articlebottom .imgWrap img {
    margin:0px;
    padding:0px;
    width:295px;
    float:left;
    margin:10px;
    height:200px;
    border:5px solid #000;

}

#articlebottom .imgDescription {
    position: absolute;
    padding-top:35px;
    letter-spacing: 2px;
    background-color: rgba(255, 250, 250, 0.2);
    color: #1b9bff;
    font-weight:bold;
    font-size:18pt;
    width:310px;
    height:50px;
    opacity: 1;
    text-align:center;
    visibility: hidden;
    opacity: 100;
    text-transform:uppercase;
    /*-webkit-transition: visibility opacity 0.2s;*/
}
#articlebottom .imgWrap:hover .imgDescription {
    visibility: visible;

}

Fiddle

我有什么：

1. 我有三张照片。
2. 即使我将鼠标悬停在第二张图片上，文字也会显示在第一张图片上。！

我需要什么：

1. 当我将鼠标悬停在图像上时，相应的文字会以透明的背景显示在图像上。

我的设计出现问题：

即使我将鼠标悬停在第二张图像上，文字也只显示在第一张图片上。!!

Answer 1

使用绝对位置时，请确保该元素的父级具有相对位置：

WORKING DEMO

*{/*reset*/
    padding:0;
    margin:0;
}
#articlebottom {
    width: 980px;
    height: 300px;          
}

.products{
    width:980px;
    margin:0px auto;
    padding-left:20px;
} 
#articlebottom .imgWrap {
    width:295px;
    height:200px;
    position:relative;/* set .imgWrap to relative to be able to use position absolute on childrens*/
    float:left;
    margin:10px;
    border:5px solid #000;
}
#articlebottom .imgWrap img {
    width:100%;
    height:100%;
}

#articlebottom .imgDescription {
    position: absolute;
    top:35px;
    left:0;
    letter-spacing: 2px;
    background-color: rgba(255, 250, 250, 0.2);
    color: #1b9bff;
    font-weight:bold;
    font-size:18pt;
    width:100%;
    height:50px;
    opacity: 1;
    text-align:center;
    visibility: hidden;
    opacity: 100;
    text-transform:uppercase;
    /*-webkit-transition: visibility opacity 0.2s;*/
}
#articlebottom .imgWrap:hover .imgDescription {
    visibility: visible;

}

UPDATE: DEMO

Answer 2

我刚用@kougiland解决方案，您需要将透明背景高度设置为图像高度

<强> CSS

  *{
    padding:0;
    margin:0;
}
#articlebottom {
    width: 980px;
    height: 300px;          
}

.products{
    width:980px;
    margin:0px auto;
    padding-left:20px;
} 
#articlebottom .imgWrap {
    width:295px;
    height:200px;
    position:relative;
    float:left;
    margin:10px;
    background:black;
}
#articlebottom .imgWrap img {
    position:absolute;
    left:5px;
    top:5px;
    width:285px;
    height:190px;
}

#articlebottom .imgDescription {
    position: absolute;
    left:0;
    letter-spacing: 2px;
    background-color: rgba(255, 250, 250, 0.2);
    color: rgba(255, 250, 250, 0.2);
    font-weight:bold;
    font-size:18pt;
    line-height: 50px;
    width:100%;
    height:25%;
    opacity: 0;
    text-align:center;
    text-transform:uppercase;
    transition:opacity 500ms ease-in-out, color 20ms ease-in-out,height 500ms ease-in-out;
}

#articlebottom .imgWrap:hover .imgDescription {
    opacity: 1;
    height:100%;
    color: #1b9bff;
}

Fiddle Demo