Css Sprite使用方法

Css Sprite使用方法：

1、将用到的背景圖檔壓縮為zip格式的壓縮包

2、用Css圖檔拼合生成器将其拼合成一張圖檔，然後下載下傳該圖檔

3、拼合完成後會生成相應的Css規則，該檔案定位了每個圖檔的位置及圖檔的寬度和高度

4、在Css樣式中定位背景圖檔，例如：

html代碼：

ul.share li{float:left;}
ul.share li a{display:block;width:25px;height:25px;text-indent:-9999px;}
a.renren{background:url(../images/share.gif) 0 0 no-repeat;}
a.kaixin{background:url(../images/share.gif) -25px 0 no-repeat;}
a.sina{background:url(../images/share.gif) -50px 0 no-repeat;}
a.douban{background:url(../images/share.gif) -75px 0 no-repeat;}
a.googleBM{background:url(../images/share.gif) -100px 0 no-repeat;} 
           

Css代碼：

<ul class="share">
<li>分享到：</li>
<li><a class="renren" href="/cuiying_2007/blog/ " target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  title="">人人網</a></li>
<li><a class="kaixin" href="/cuiying_2007/blog/ " target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  title="">開心網</a></li>
<li><a class="sina" href="/cuiying_2007/blog/ " target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  title="">新浪微網誌</a></li>
<li><a class="douban" href="/cuiying_2007/blog/ " target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  title="">豆瓣</a></li>
<li><a class="googleBM" href="/cuiying_2007/blog/ " target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow"  title="">谷歌書簽</a></li>
</ul>
           

注：

background第一個數字：X軸的偏移量

background第二個數字：Y軸的偏移量

上述兩個偏移量就是用圖檔拼合生成器拼合圖檔時生成的Css規則中的偏移量

5、需要repeat的圖檔也有可能不适合放在sprite中，當然如果隻是單向的repeat，如：repeat-x

或repeat-y，隻要保證圖檔在該方向鋪滿就可以了，但是如果sprite很大，會消耗較多

的記憶體，或者需要橫向和縱向同時平鋪的圖檔，也都不适合放在sprite中