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2020-04-08 27人围观 0条评论
简介用css制作星级评分

    原文:
    Creating a Star Rater using CSS

    链接:
    http://komodomedia.com/blog/index.php/2005/08/24/creating-a-star-rater-using-css/

    版权:
    版权归原作者所有,翻译文档版权归本人|greengnn,和blueidea。

    先看看效果

    Step 1: XHTML

     

        
          
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    这里只介绍静态的技术,随后会给出系统的应用,你也是自己加程序来尝试一下,还可以采用ajax来做出绚丽的效果

    Step 2:图像|Graphics

    为了节省您的空间和宽带,我们采用gif图,这个图片就是打分的按钮。


    Step 3:CSS

        .star-rating{
        list-style: none; /* turn off the default list image bullets*/
        margin: 3px; /*I wan't some space around this thing*/
        padding: 0px; /* I'm anal. I'm pretty sure OL's have a default padding of 0px, but we'll set it to 0px just to be safe*/
        width: 100px; /*This list is 5 stars, each star is 20px, therefore it should be 5 x 20px = 100px wide*/
        height: 20px; /* The height of each star is 20px. Since this is a horizontal list, we will set the list height to the height of the star.*/
        position: relative; /*Very important. We will be using absolute positioning later. We want to use relatively-absolute positioning.*/
        background: url(star_rating.gif) top left repeat-x; /* By repeating this image horizontally, the list will appear to have five stars.*/
        }

    根据代码我们知道:
    去掉了ul的margin和padding以及list-style,定义了高20px宽100px的一个区块

    下来时按钮元素的制作,下面是css

        .star-rating li{
        padding:0px; /* no padding at all*/
        margin:0px; /* no margin at all*/
        /*\*/ /*Backslash hack, this causes IE5 Mac NOT to see this rule*/
        float: left; /* for any other browser, we are going to float left, this makes a horizontal list*/
        /* */ /* end the IE5 Backslash hack*/
        }

    这段代码让li实现横向排放,并解决IE5 MAC bug

    继承上面的按钮元素样式,再定义鼠标动作,下面是css

       .star-rating li a{
        display:block; /* we want a block item, so that we can mess with its height and width*/
        width:20px; /* easy stuff, we want the width to be the same as the star width*/
        height: 20px; /* same as the width*/
        text-decoration: none; /* remove the underline from the link*/
        text-indent: -9000px; /* indent the text off the screen using a [url=http://www.mezzoblue.com/tests/revised-image-replacement/]image-replacement technique[/url], we dont want to see the text anymore.*/
        z-index: 20; /*we'll come back to this*/
        position: absolute; /*we can now control the exact x and y coordinates of each star, relative to the parent UL*/
        padding: 0px; /*once again, we don't need any padding*/
       background-image:none; /* we will not show the star*/
       }

      13. .star-rating li a:hover{
      14. background: url(star_rating.gif) left bottom; /*this is where the magic is*/
      15. z-index: 1; /*move this star to the bottom of the z-index stack*/
      16. left: 0px; /*move this star all the way to the left, aligned with the side of the UL parent item*/
      17. }

    下来我们要考虑怎样才能显示不同的星级,三星?四星?原理是什么,我们继续将背景图片横向重复显示,然后定义a和a:hover的宽度来区分选择的星级。

    下面是css

       .star-rating a.one-star{
        left: 0px;
        }  
       .star-rating a.one-star:hover{
        width:20px;
        }
       .star-rating a.two-stars{
        left:20px;
       }
       .star-rating a.two-stars:hover{
       width: 40px;
       }
       .star-rating a.three-stars{
       left: 40px;
       }
       .star-rating a.three-stars:hover{
       width: 60px;
       }
       .star-rating a.four-stars{
       left: 60px;
       }
       .star-rating a.four-stars:hover{
       width: 80px;
       }
       .star-rating a.five-stars{
       left: 80px;
       }
       .star-rating a.five-stars:hover{
       width: 100px;
       }

    到此,这个制作完成

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