无论是提示框还是导航栏都能看到如上图所示的带有箭头的框框，这种箭头可以通过背景图片或者是css来实现，本文介绍三种通过css实现带箭头的提示框。
- 通过border属性
思路：两个三角形，通过定位使两个三角形相差1px作为边框。 - CSS3 transfrom
思路：先做一个两条边相同颜色的正方形，然后旋转一定角度就是三角形了 - 特殊字符'♦'
思路：特殊字符漏出上半部分，看上去就像三角形了
一、通过border属性：
我们先做一个宽和高都是10px的div，边框也是10px，
<span style="color: #008080;">1</span> <span style="color: #800000;">width: 10px; </span><span style="color: #008080;">2</span> <span style="color: #800000;">height: 10px; </span><span style="color: #008080;">3</span> <span style="color: #800000;">border: 10px solid; </span><span style="color: #008080;">4</span> <span style="color: #800000;">border-color: red green yellow blue; </span>
如下图：
图中间空白是我们设置的宽和高，如果设置为0px，会出现什么情况呢？，如下图：
这时候我们就可以通过设置它的左右和下边框的颜色都设成透明或和背景颜色相同的颜色，就出来我们想要的三角形了。如下图：
现在我们来实现第一幅图上的效果：
css：
<span style="color: #008080;"> 1</span> <span style="color: #800000;">.info </span>{
<span style="color: #008080;"> 2</span> <span style="color: #ff0000;"> margin-top</span>:<span style="color: #0000ff;"> 50px</span>;
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;">relative</span>;
<span style="color: #008080;"> 4</span> <span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;">200px</span>;
<span style="color: #008080;"> 5</span> <span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;">50px</span>;
<span style="color: #008080;"> 6</span> <span style="color: #ff0000;"> line-height</span>:<span style="color: #0000ff;">60px</span>;
<span style="color: #008080;"> 7</span> <span style="color: #ff0000;"> background</span>:<span style="color: #0000ff;">#F6F1B3</span>;
<span style="color: #008080;"> 8</span> <span style="color: #ff0000;"> box-shadow</span>:<span style="color: #0000ff;">1px 2px 3px #E9D985</span>;
<span style="color: #008080;"> 9</span> <span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;">1px solid #DACE7C</span>;
<span style="color: #008080;">10</span> <span style="color: #ff0000;"> border-radius</span>:<span style="color: #0000ff;">4px</span>;
<span style="color: #008080;">11</span> <span style="color: #ff0000;"> text-align</span>:<span style="color: #0000ff;">center</span>;
<span style="color: #008080;">12</span> <span style="color: #ff0000;"> color</span>:<span style="color: #0000ff;">red</span>;
<span style="color: #008080;">13</span> }
<span style="color: #008080;">14</span> <span style="color: #800000;"> .nav </span>{
<span style="color: #008080;">15</span> <span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;">absolute</span>;
<span style="color: #008080;">16</span> <span style="color: #ff0000;"> left</span>:<span style="color: #0000ff;">30px</span>;
<span style="color: #008080;">17</span> <span style="color: #ff0000;"> overflow</span>:<span style="color: #0000ff;">hidden</span>;
<span style="color: #008080;">18</span> <span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;">0</span>;
<span style="color: #008080;">19</span> <span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;">0</span>;
<span style="color: #008080;">20</span> <span style="color: #ff0000;"> border-width</span>:<span style="color: #0000ff;">10px</span>;
<span style="color: #008080;">21</span> <span style="color: #ff0000;"> border-style</span>:<span style="color: #0000ff;">solid dashed dashed dashed</span>;
<span style="color: #008080;">22</span> }
<span style="color: #008080;">23</span> <span style="color: #800000;"> .nav-border </span>{
<span style="color: #008080;">24</span> <span style="color: #ff0000;"> top</span>:<span style="color: #0000ff;">-20px</span>;
<span style="color: #008080;">25</span> <span style="color: #ff0000;"> border-color</span>:<span style="color: #0000ff;">transparent transparent #DACE7C transparent</span>;
<span style="color: #008080;">26</span> }
<span style="color: #008080;">27</span> <span style="color: #800000;"> .nav-background </span>{
<span style="color: #008080;">28</span> <span style="color: #ff0000;"> top</span>:<span style="color: #0000ff;">-19px</span>;
<span style="color: #008080;">29</span> <span style="color: #ff0000;"> border-color</span>:<span style="color: #0000ff;">transparent transparent #F6F1B3 transparent</span>;
<span style="color: #008080;">30</span> }
html：
<span style="color: #008080;">1</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="info"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">2</span> <span style="color: #0000ff;"><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>提示信息<span style="color: #0000ff;"></span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span> <span style="color: #008080;">3</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="nav nav-border"</span><span style="color: #0000ff;">></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span> <span style="color: #008080;">4</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="nav nav-background"</span><span style="color: #0000ff;">></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span> <span style="color: #008080;">5</span> <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span></span></span></span></span>
二、 CSS3 transfrom
我们首先制作一个两条相邻的边框颜色相同，其他两条边边框为0px的div方框。如图：
在将方框旋转45度就可以实现三角提示效果了。
css：
<span style="color: #008080;"> 1</span> <span style="color: #800000;">.info </span>{
<span style="color: #008080;"> 2</span> <span style="color: #ff0000;"> margin-top </span>:<span style="color: #0000ff;"> 50px</span>;
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;"> position </span>:<span style="color: #0000ff;">relative</span>;
<span style="color: #008080;"> 4</span> <span style="color: #ff0000;"> width </span>:<span style="color: #0000ff;">200px</span>;
<span style="color: #008080;"> 5</span> <span style="color: #ff0000;"> height </span>:<span style="color: #0000ff;">50px</span>;
<span style="color: #008080;"> 6</span> <span style="color: #ff0000;"> line-height </span>:<span style="color: #0000ff;">60px</span>;
<span style="color: #008080;"> 7</span> <span style="color: #ff0000;"> background </span>:<span style="color: #0000ff;">#F6F1B3</span>;
<span style="color: #008080;"> 8</span> <span style="color: #ff0000;"> box-shadow </span>:<span style="color: #0000ff;">1px 2px 3px #E9D985</span>;
<span style="color: #008080;"> 9</span> <span style="color: #ff0000;"> border </span>:<span style="color: #0000ff;">1px solid #DACE7C</span>;
<span style="color: #008080;">10</span> <span style="color: #ff0000;"> border-radius </span>:<span style="color: #0000ff;">4px</span>;
<span style="color: #008080;">11</span> <span style="color: #ff0000;"> text-align </span>:<span style="color: #0000ff;">center</span>;
<span style="color: #008080;">12</span> <span style="color: #ff0000;"> color </span>:<span style="color: #0000ff;">red</span>;
<span style="color: #008080;">13</span> }
<span style="color: #008080;">14</span> <span style="color: #800000;"> .nav </span>{
<span style="color: #008080;">15</span> <span style="color: #ff0000;"> position </span>:<span style="color: #0000ff;">absolute</span>;
<span style="color: #008080;">16</span> <span style="color: #ff0000;"> top </span>:<span style="color: #0000ff;">-8px</span>;
<span style="color: #008080;">17</span> <span style="color: #ff0000;"> left </span>:<span style="color: #0000ff;">30px</span>;
<span style="color: #008080;">18</span> <span style="color: #ff0000;"> overflow </span>:<span style="color: #0000ff;">hidden</span>;
<span style="color: #008080;">19</span> <span style="color: #ff0000;"> width </span>:<span style="color: #0000ff;">13px</span>;
<span style="color: #008080;">20</span> <span style="color: #ff0000;"> height </span>:<span style="color: #0000ff;">13px</span>;
<span style="color: #008080;">21</span> <span style="color: #ff0000;"> background </span>:<span style="color: #0000ff;">#F6F1B3</span>;
<span style="color: #008080;">22</span> <span style="color: #ff0000;"> border-left </span>:<span style="color: #0000ff;">1px solid #DACE7C</span>;
<span style="color: #008080;">23</span> <span style="color: #ff0000;"> border-top </span>:<span style="color: #0000ff;">1px solid #DACE7C</span>;
<span style="color: #008080;">24</span> <span style="color: #ff0000;"> -webkit-transform </span>:<span style="color: #0000ff;">rotate(45deg)</span>;
<span style="color: #008080;">25</span> <span style="color: #ff0000;"> -moz-transform </span>:<span style="color: #0000ff;">rotate(45deg)</span>;
<span style="color: #008080;">26</span> <span style="color: #ff0000;"> -o-transform </span>:<span style="color: #0000ff;">rotate(45deg)</span>;
<span style="color: #008080;">27</span> <span style="color: #ff0000;"> transform </span>:<span style="color: #0000ff;">rotate(45deg)</span>;
<span style="color: #008080;">28</span> }
html：
<span style="color: #008080;">1</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="info"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">2</span> <span style="color: #0000ff;"><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>提示信息<span style="color: #0000ff;"></span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span> <span style="color: #008080;">3</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="nav"</span><span style="color: #0000ff;">></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span> <span style="color: #008080;">4</span> <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span></span></span></span>
三、特殊字符'♦'
'♦'是一个特殊字符，也就相当于一个字，所以大小是通过font-size来设置，实现第一幅图的效果：
css：
<span style="color: #008080;"> 1</span> <span style="color: #800000;">.info </span>{
<span style="color: #008080;"> 2</span> <span style="color: #ff0000;"> margin-top</span>:<span style="color: #0000ff;"> 50px</span>;
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;">relative</span>;
<span style="color: #008080;"> 4</span> <span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;">200px</span>;
<span style="color: #008080;"> 5</span> <span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;">50px</span>;
<span style="color: #008080;"> 6</span> <span style="color: #ff0000;"> line-height</span>:<span style="color: #0000ff;">60px</span>;
<span style="color: #008080;"> 7</span> <span style="color: #ff0000;"> background</span>:<span style="color: #0000ff;">#F6F1B3</span>;
<span style="color: #008080;"> 8</span> <span style="color: #ff0000;"> box-shadow</span>:<span style="color: #0000ff;">1px 2px 3px #E9D985</span>;
<span style="color: #008080;"> 9</span> <span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;">1px solid #DACE7C</span>;
<span style="color: #008080;">10</span> <span style="color: #ff0000;"> border-radius</span>:<span style="color: #0000ff;">4px</span>;
<span style="color: #008080;">11</span> <span style="color: #ff0000;"> text-align</span>:<span style="color: #0000ff;">center</span>;
<span style="color: #008080;">12</span> <span style="color: #ff0000;"> color</span>:<span style="color: #0000ff;">red</span>;
<span style="color: #008080;">13</span> }
<span style="color: #008080;">14</span> <span style="color: #800000;"> .nav </span>{
<span style="color: #008080;">15</span> <span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;">absolute</span>;
<span style="color: #008080;">16</span> <span style="color: #ff0000;"> left</span>:<span style="color: #0000ff;">30px</span>;
<span style="color: #008080;">17</span> <span style="color: #ff0000;"> overflow</span>:<span style="color: #0000ff;">hidden</span>;
<span style="color: #008080;">18</span> <span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;">24px</span>;
<span style="color: #008080;">19</span> <span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;">24px</span>;
<span style="color: #008080;">20</span> <span style="color: #ff0000;"> font</span>:<span style="color: #0000ff;">normal 24px "微软雅黑"</span>;
<span style="color: #008080;">21</span> }
<span style="color: #008080;">22</span> <span style="color: #800000;"> .nav-border </span>{
<span style="color: #008080;">23</span> <span style="color: #ff0000;"> top</span>:<span style="color: #0000ff;">-17px</span>;
<span style="color: #008080;">24</span> <span style="color: #ff0000;"> color</span>:<span style="color: #0000ff;">#DACE7C</span>;
<span style="color: #008080;">25</span> }
<span style="color: #008080;">26</span> <span style="color: #800000;"> .nav-background </span>{
<span style="color: #008080;">27</span> <span style="color: #ff0000;"> top</span>:<span style="color: #0000ff;">-16px</span>;
<span style="color: #008080;">28</span> <span style="color: #ff0000;"> color</span>:<span style="color: #0000ff;">#F6F1B3</span>;
<span style="color: #008080;">29</span> }
html：
<span style="color: #008080;">1</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="info"</span><span style="color: #0000ff;">></span> <span style="color: #008080;">2</span> <span style="color: #0000ff;"><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>提示信息<span style="color: #0000ff;"></span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span> <span style="color: #008080;">3</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="nav nav-border"</span><span style="color: #0000ff;">></span>♦<span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span> <span style="color: #008080;">4</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="nav nav-background"</span><span style="color: #0000ff;">></span>♦<span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span> <span style="color: #008080;">5</span> <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span></span></span></span></span>
下面是一个兼容IE5.5+,chrome,Firfox等浏览器的一个demo，如果你有用到可以直接考到自己的项目中。
<span style="color: #008080;"> 1</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 2</span> <span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 3</span> <span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 4</span> <span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 5</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="Content-Type"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="text/html;charset=utf-8"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 6</span> <span style="color: #0000ff;"><span style="color: #800000;">style</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 7</span> <span style="background-color: #f5f5f5; color: #800000;"> div.container</span><span style="background-color: #f5f5f5; color: #000000;">{</span>
<span style="color: #008080;"> 8</span> <span style="background-color: #f5f5f5; color: #ff0000;"> position </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">absolute</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;"> 9</span> <span style="background-color: #f5f5f5; color: #ff0000;"> top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">30px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">10</span> <span style="background-color: #f5f5f5; color: #ff0000;"> left </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">40px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">11</span> <span style="background-color: #f5f5f5; color: #ff0000;"> font-size </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 9pt</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">12</span> <span style="background-color: #f5f5f5; color: #ff0000;"> display </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">block</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">13</span> <span style="background-color: #f5f5f5; color: #ff0000;"> height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">100px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">14</span> <span style="background-color: #f5f5f5; color: #ff0000;"> width </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">200px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">15</span> <span style="background-color: #f5f5f5; color: #ff0000;"> background-color </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">transparent</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">16</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *border </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">1px solid #666</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">17</span> <span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">18</span> <span style="background-color: #f5f5f5; color: #800000;"> s</span><span style="background-color: #f5f5f5; color: #000000;">{</span>
<span style="color: #008080;">19</span> <span style="background-color: #f5f5f5; color: #ff0000;"> position </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">absolute</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">20</span> <span style="background-color: #f5f5f5; color: #ff0000;"> top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">-20px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">21</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">-22px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">22</span> <span style="background-color: #f5f5f5; color: #ff0000;"> left </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">20px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">23</span> <span style="background-color: #f5f5f5; color: #ff0000;"> display </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">block</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">24</span> <span style="background-color: #f5f5f5; color: #ff0000;"> height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">25</span> <span style="background-color: #f5f5f5; color: #ff0000;"> width </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">26</span> <span style="background-color: #f5f5f5; color: #ff0000;"> font-size </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">27</span> <span style="background-color: #f5f5f5; color: #ff0000;"> line-height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">28</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border-color </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">transparent transparent #666 transparent</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">29</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border-style </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">dashed dashed solid dashed</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">30</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border-width </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">10px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">31</span> <span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">32</span> <span style="background-color: #f5f5f5; color: #800000;"> i</span><span style="background-color: #f5f5f5; color: #000000;">{</span>
<span style="color: #008080;">33</span> <span style="background-color: #f5f5f5; color: #ff0000;"> position </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">absolute</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">34</span> <span style="background-color: #f5f5f5; color: #ff0000;"> top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">-9px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">35</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">-9px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">36</span> <span style="background-color: #f5f5f5; color: #ff0000;"> left </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">-10px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">37</span> <span style="background-color: #f5f5f5; color: #ff0000;"> display </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">block</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">38</span> <span style="background-color: #f5f5f5; color: #ff0000;"> height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">39</span> <span style="background-color: #f5f5f5; color: #ff0000;"> width </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">40</span> <span style="background-color: #f5f5f5; color: #ff0000;"> font-size </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">41</span> <span style="background-color: #f5f5f5; color: #ff0000;"> line-height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">42</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border-color </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">transparent transparent #fff transparent</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">43</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border-style </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">dashed dashed solid dashed</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">44</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border-width </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">10px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">45</span> <span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">46</span> <span style="background-color: #f5f5f5; color: #800000;"> .content</span><span style="background-color: #f5f5f5; color: #000000;">{</span>
<span style="color: #008080;">47</span> <span style="background-color: #f5f5f5; color: #ff0000;"> border </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">1px solid #666</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">48</span> <span style="background-color: #f5f5f5; color: #ff0000;"> -moz-border-radius </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">3px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">49</span> <span style="background-color: #f5f5f5; color: #ff0000;"> -webkit-border-radius </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">3px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">50</span> <span style="background-color: #f5f5f5; color: #ff0000;"> position </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">absolute</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">51</span> <span style="background-color: #f5f5f5; color: #ff0000;"> background-color </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">#fff</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">52</span> <span style="background-color: #f5f5f5; color: #ff0000;"> width </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">100%</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">53</span> <span style="background-color: #f5f5f5; color: #ff0000;"> height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">100%</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">54</span> <span style="background-color: #f5f5f5; color: #ff0000;"> padding </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">5px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">55</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">-2px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">56</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *border-top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">1px solid #666</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">57</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *border-top </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">1px solid #666</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">58</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *border-left </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">none</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">59</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *border-right </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">none</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">60</span> <span style="background-color: #f5f5f5; color: #ff0000;"> *height </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">102px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">61</span> <span style="background-color: #f5f5f5; color: #ff0000;"> box-shadow </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 3px 3px 4px #999</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">62</span> <span style="background-color: #f5f5f5; color: #ff0000;"> -moz-box-shadow </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 3px 3px 4px #999</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">63</span> <span style="background-color: #f5f5f5; color: #ff0000;"> -webkit-box-shadow </span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 3px 3px 4px #999</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">64</span> <span style="background-color: #f5f5f5; color: #008000;">/*</span><span style="background-color: #f5f5f5; color: #008000;"> For IE 5.5 - 7 </span><span style="background-color: #f5f5f5; color: #008000;">*/</span>
<span style="color: #008080;">65</span> <span style="background-color: #f5f5f5; color: #ff0000;"> filter</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> progid:DXImageTransform.Microsoft.Shadow(Strength=4, Direction=135, Color='#999999')</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">66</span> <span style="background-color: #f5f5f5; color: #008000;">/*</span><span style="background-color: #f5f5f5; color: #008000;"> For IE 8 </span><span style="background-color: #f5f5f5; color: #008000;">*/</span>
<span style="color: #008080;">67</span> <span style="background-color: #f5f5f5; color: #ff0000;"> -ms-filter</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> "progid:DXImageTransform.Microsoft.Shadow(Strength=4, Direction=135, Color='#999999')"</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">68</span> <span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">69</span> <span style="color: #0000ff;"></span><span style="color: #800000;">style</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">70</span> <span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">71</span> <span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">72</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="container"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">73</span> <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="content"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">74</span> <span style="color: #000000;"> hello world!
</span><span style="color: #008080;">75</span> <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">76</span> <span style="color: #0000ff;"><span style="color: #800000;">s</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">77</span> <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">78</span> <span style="color: #0000ff;"></span><span style="color: #800000;">s</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">79</span> <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">80</span> <span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">81</span> <span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span>
效果图：
小结：
带箭头的提示框给用户的交互带来很好的效果，本文介绍了三个方法，如果你还有其他方法可以@me，我会非常感激。希望本文能够对你有些帮助。
성명
본 글의 내용은 네티즌들의 자발적인 기여로 작성되었으며, 저작권은 원저작자에게 있습니다. 본 사이트는 이에 상응하는 법적 책임을 지지 않습니다. 표절이나 침해가 의심되는 콘텐츠를 발견한 경우 admin@php.cn으로 문의하세요.
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AI 옷 제거제
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완전히 무료인 AI 얼굴 교환 도구를 사용하여 모든 비디오의 얼굴을 쉽게 바꾸세요!
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뜨거운 도구
안전한 시험 브라우저
안전한 시험 브라우저는 온라인 시험을 안전하게 치르기 위한 보안 브라우저 환경입니다. 이 소프트웨어는 모든 컴퓨터를 안전한 워크스테이션으로 바꿔줍니다. 이는 모든 유틸리티에 대한 액세스를 제어하고 학생들이 승인되지 않은 리소스를 사용하는 것을 방지합니다.
Atom Editor Mac 버전 다운로드
가장 인기 있는 오픈 소스 편집기
Eclipse용 SAP NetWeaver 서버 어댑터
Eclipse를 SAP NetWeaver 애플리케이션 서버와 통합합니다.
SublimeText3 중국어 버전
중국어 버전, 사용하기 매우 쉽습니다.
SecList
SecLists는 최고의 보안 테스터의 동반자입니다. 보안 평가 시 자주 사용되는 다양한 유형의 목록을 한 곳에 모아 놓은 것입니다. SecLists는 보안 테스터에게 필요할 수 있는 모든 목록을 편리하게 제공하여 보안 테스트를 더욱 효율적이고 생산적으로 만드는 데 도움이 됩니다. 목록 유형에는 사용자 이름, 비밀번호, URL, 퍼징 페이로드, 민감한 데이터 패턴, 웹 셸 등이 포함됩니다. 테스터는 이 저장소를 새로운 테스트 시스템으로 간단히 가져올 수 있으며 필요한 모든 유형의 목록에 액세스할 수 있습니다.
