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CSS controls image scaling or partial display_html/css_WEB-ITnose

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Release: 2016-06-24 11:45:48
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 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>CSS控制图片缩放或者部分显示</title> 6 </head> 7      8 <body> 9 <!--图片自动缩放显示:通过设置图片宽来实现-->10     11     12     <!--第一种:设置图片的宽为屏幕宽度的百分比,实现图片跟随屏幕大小自动缩放-->13     <p><img src="images/1.jpg" style="width:40%"/><p>14     15     <!--第二种:设置max-width、max-height自动适应父容器,设置max-height有一个缺点就是当图片宽度大于容量时会超出父容器或者显示不全(父容器overflow:hidden;)-->16     <div style="width:200px; height:200px; border:1px dashed red;">17         <img src="images/1.jpg" style="max-width:200px;"/>18     </div>19     <div style="width:200px; height:200px; border:1px dashed red; overflow:hidden;">20         <img src="images/1.jpg" style="max-height:200px;"/>21     </div>22     23 <!--显示图片部分内容的三种方法--> 24 25 26     <!--第一种方法:对于不定长的背景图片来说比较好用,显示正中央部分-->27     <div style="width:200px; height:200px; border:1px dashed red; background:url(images/3.jpg) no-repeat center center"></div>28     29     <!--第二种:父容器设置为overflow:hidden;然后把margin的值设置为负来实现-->30     <div style="width:300px; height:300px; border:1px solid red; overflow:hidden;">31         <img src="images/2.jpg" style="margin-top:-25px; margin-left:-50px;"/>32     </div>33     34     <!--第三种:先设置父相子绝的定位,然后通过将top和left的值设置为负值-->35     <div style="width:300px; height:300px; border:1px solid red; position:absolute; overflow:hidden;">36         <img src="images/2.jpg" style="position:absolute; top:-200px; left:-100px;"/>37     </div>38 39 </body>40 </html>
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