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# 响应式布局 | ||
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- 容器分类 | ||
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- container:两边留白 | ||
- container-fluid:每一种设备都是100%宽度 | ||
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- 设备代号 | ||
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- xs:超小屏幕 手机 (<768px):col-xs-12 | ||
- sm:小屏幕 平板 (≥768px) | ||
- md:中等屏幕 桌面显示器 (≥992px) | ||
- lg:大屏幕 大桌面显示器 (≥1200px) | ||
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# CSS样式和组件 | ||
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``` | ||
1\. 全局CSS样式: | ||
* 按钮:class="btn btn-default" | ||
* 图片: | ||
* class="img-responsive":图片在任意尺寸都占100% | ||
* 图片形状 | ||
* <img src="..." alt="..." class="img-rounded">:方形 | ||
* <img src="..." alt="..." class="img-circle"> : 圆形 | ||
* <img src="..." alt="..." class="img-thumbnail"> :相框 | ||
* 表格 | ||
* table | ||
* table-bordered | ||
* table-hover | ||
* 表单 | ||
* 给表单项添加:class="form-control" | ||
2\. 组件: | ||
* 导航条 | ||
* 分页条 | ||
3\. 插件: | ||
* 轮播图 | ||
``` | ||
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_xml 与 html_ | ||
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- xml标签都是自定义的,html标签是预定义。 | ||
- xml的语法严格,html语法松散 | ||
- xml是存储数据的,html是展示数据 | ||
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# 基本语法 | ||
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- xml文档的后缀名 .xml | ||
- xml第一行必须定义为文档声明 | ||
- xml文档中有且仅有一个根标签 | ||
- 属性值必须使用引号(单双都可)引起来 | ||
- 标签必须正确关闭 | ||
- xml标签名称区分大小写 | ||
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# 组成部分 | ||
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## 文档声明 | ||
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- 格式:`<?xml 属性列表 ?>` | ||
- 属性列表: | ||
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- version:版本号,必须的属性 | ||
- encoding:编码方式。告知解析引擎当前文档使用的字符集,默认值:ISO-8859-1 | ||
- standalone:是否独立 | ||
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- 取值: | ||
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- yes:不依赖其他文件 | ||
- no:依赖其他文件 | ||
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## 标签 | ||
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- 规则: | ||
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- 名称可以包含字母、数字以及其他的字符 | ||
- 名称不能以数字或者标点符号开始 | ||
- 名称不能以字母 xml(或者 XML、Xml 等等)开始 | ||
- 名称不能包含空格 | ||
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## 属性属性 | ||
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id属性值唯一 | ||
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## 文本: | ||
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- CDATA区:在该区域中的数据会被原样展示 | ||
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- 格式: `<![CDATA[ 数据 ]]>` | ||
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# 约束 | ||
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![约束](/assets/约束.bmp) | ||
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## DTD | ||
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- 内部dtd:将约束规则定义在xml文档中 | ||
- 外部dtd:将约束的规则定义在外部的dtd文件中 | ||
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- 本地:`<!DOCTYPE 根标签名 SYSTEM "dtd文件的位置">` | ||
- 网络:`<!DOCTYPE 根标签名 PUBLIC "dtd文件名字" "dtd文件的位置URL">` | ||
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## Schema | ||
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# 解析 | ||
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- DOM:将标记语言文档一次性加载进内存,在内存中形成一颗dom树 | ||
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- 优点:操作方便,可以对文档进行CRUD的所有操作 | ||
- 缺点:占内存 | ||
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- SAX:逐行读取,基于事件驱动的。 | ||
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- 优点:不占内存。 | ||
- 缺点:只能读取,不能增删改 | ||
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