当前位置:Gxlcms > JavaScript > Bootstrap每天必学之媒体对象_javascript技巧

Bootstrap每天必学之媒体对象_javascript技巧

时间:2021-07-01 10:21:17 帮助过:5人阅读

在Web页面或者说移动页面制作中,常常看到这样的效果,左边居左(或居右),内容居右(或居左)排列,如下图所示:

我们常常把这样的效果称为媒体对象。可以说他是一种抽像的样式,可以用来构建不同类型的组件。这些组件都具有开篇所说的样式风格。那么在Bootstrap框架中特意将些部分提取出来做来一个组件介绍。其对应的版本文件:

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/LESS版本:对应的源文件是media.less

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/Sass版本:对应的源文件是_media.scss

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/编译后版本:对应bootstrap.css文件第4792行~第4819行

1、媒体对象–默认媒体对象

媒体对象一般是成组出现,而一组媒体对象常常包括以下几个部分:

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/媒体对像的容器:常使用“media”类名表示,用来容纳媒体对象的所有内容

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/媒体对像的对象:常使用“media-object”表示,就是媒体对象中的对象,常常是图片

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/媒体对象的主体:常使用“media-body”表示,就是媒体对像中的主体内容,可以是任何元素,常常是图片侧边内容

☑https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/媒体对象的标题:常使用“media-heading”表示,就是用来描述对象的一个标题,此部分可选

如下图所示:

除了上面四个部分之外,在Bootstrap框架中还常常使用“pull-left”或者“pull-right”来控制媒体对象中的对象浮动方式。

在具体使用中如下所示:

https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/系列:十天精通CSS3 https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/
全方位深刻详解CSS3模块知识,经典案例分析,代码同步调试,让网页穿上绚丽装备!
https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/

运行效果如下:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/

原理分析:

媒体对象样式相对来说比较简单,只是设置他们之间的间距,如下所示:

/bootstrap.css文件第4792行~4815行/

.media, .media-bodyhttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/overflow:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/hidden; https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/zoom:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/1; } .media, .mediahttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/.mediahttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/margin-top:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/15px; } .media:first-childhttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/margin-top:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/0; } .media-objecthttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/display:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/block; } .media-headinghttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/margin:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/0https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/0https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/5px; } .mediahttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/>https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/.pull-lefthttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/margin-right:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/10px; } .mediahttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/>https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/.pull-righthttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/margin-left:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/10px; }

2、媒体对象–媒体对象的嵌套

在评论系统中,常常能看到下图的效果:

从外往里看,这里有三个媒体对象,只不过是一个嵌套在另一个的里面。那么在Bootstrap框架中的媒体对象也具备这样的功能,只需要将另一个媒体对象结构放置在媒体对象的主体内“media-body”,如下所示:

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在确保你的结构没有嵌套错的情况下,能直接看到下图这样的效果:

3、媒体对象–媒体对象列表

媒体对象的嵌套仅是媒体对象中一个简单应用效果之一,在很多时候,我们还会碰到一个列表,每个列表项都和媒体对象长得差不多,同样用评论系统来说事:

使用方法:

针对上图的媒体对象列表效果,Bootstrap框架提供了一个列表展示的效果,在写结构的时候可以使用ul,并且在ul上添加类名“media-list”,而在li上使用“media”,示例代码如下:

https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/Mediahttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/Header https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/
https://img.gxlcms.com/https://img.gxlcms.com/https://img.gxlcms.com//Uploads-s//Uploads-s//Uploads-s/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/…
https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com/https://img.gxlcms.com/https://img.gxlcms.com//Uploads-s//Uploads-s//Uploads-s/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/… https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/https://img.gxlcms.com/https://img.gxlcms.com/https://img.gxlcms.com//Uploads-s//Uploads-s//Uploads-s/https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/…

运行效果如下:

原理分析:

媒体对象列表,在样式上也并没有做过多的特殊处理,只是把列表的左间距置0以及去掉了项目列表符号:

/bootstrap.css文件第4816行~第4819行/

.media-listhttps://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/{ https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/padding-left:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/0; https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/list-style:https://img.gxlcms.com//Uploads-s/new/2019-09-24-201924/none; }

以上就是本文的全部内容,帮助大家学习Bootstrap媒体对象,希望对大家的学习有所帮助。

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