如何使css精灵悬停的过渡效果

Question

这里是我的css精灵代码的一部分

        #IconSet a {
        width: 36px;
        height: 36px;
        display: inline-block;
    }
    #DeviantArtIcon {
        border-width: 0px;
        border-style: none;
        background-image: url(http://static.monstermmorpg.com/images/csssprites/SocialIcons.png);
        background-color: transparent;
        background-repeat: repeat-x;
        background-position: -144px -0px;
        width: 36px;
        height: 36px;
    }
    #DeviantArtIcon:hover {
        border-width: 0px;
        border-style: none;
        background-image: url(http://static.monstermmorpg.com/images/csssprites/SocialIcons.png);
        background-color: transparent;
        background-repeat: repeat-x;
        background-position: -144px -36px;
        width: 36px;
        height: 36px;
    }
 <a id="DeviantArtIcon" href="http://monstermmorpg.deviantart.com" rel="nofollow" target="_blank" title="Monster MMORPG On Deviant Art - Please Watch Our Channel"></a>

现在，当这个图标悬停时，我想有过渡效果。我该怎么做？

我试过这里，但没有运气

悬停上背景图像之间的CSS淡入淡出

Answer 1

将图像淡入另一个：

HTML:

<a id="deviant-art-icon" href="http://monstermmorpg.deviantart.com"><span></span></a>

CSS:

#deviant-art-icon {
    background:url(http://static.monstermmorpg.com/images/csssprites/SocialIcons.png) no-repeat;
    display: inline-block;
    position: relative;
    text-indent: -9999px;
    width: 36px;
    height: 36px;
    background-position: -144px -0px;
}
#deviant-art-icon span {
    position: absolute;
    top:0;
    left:0;
    bottom:0;
    right:0;  background:url(http://static.monstermmorpg.com/images/csssprites/SocialIcons.png) no-repeat;
    background-position: -144px -36px;
    opacity: 0;
    -webkit-transition: opacity 0.5s;
    -moz-transition:    opacity 0.5s;
    -o-transition:      opacity 0.5s;
}
#deviant-art-icon:hover span {
    opacity: 1;
}

演示：http://jsfiddle.net/hxJyw/2/

Answer 2

1）您尚未在CSS中应用任何transition effects。

2） 不需要在:hover效果中添加过渡效果。

#DeviantArtIcon { 
-o-transition:2s ease-out, background 2s ease-in;
-ms-transition:2s ease-out, background 2s ease-in;
-moz-transition:2s ease-out, background 2s ease-in;
-webkit-transition:2s ease-out, background 2s ease-in;         
transition:2s ease-out, background 2s ease-in;
}

在jSFiddle中检查此项

希望这就是你正在尝试的。