RTLabel富文本库

github地址：https://github.com/honcheng/RTLabel

常见标签说明

<b>Bold</b> //加粗
<i>Italic</i> //斜体
<bi>Bold & Italic</bi> //同时加粗斜体
<u>underline</u> //下划线
<u color=red[b]>underline with color</u> // 下划线和颜色[/b]
<a href='http://..'[b]>link</a> //链接[/b]
<uu>double underline</uu> //双下划线
<uu color='#ccff00'[b]>double underline with color</uu>
//双下划线和颜色[/b]
<font face='HelveticaNeue-CondensedBold' size=20 color='#CCFF00'[b]>custom
font</font> //自定义字体大小的颜色<font face='HelveticaNeue-CondensedBold' size=20 color='#CCFF00' stroke=1>custom font with strokes</font>//空心的字体[/b]
<font face='HelveticaNeue-CondensedBold' size=20 color='#CCFF00' kern=35[b]>custom
font with kerning</font>//可以调整字之间的间距[/b]
<p align=justify[b]>alignment</p>//单词两端对齐<p indent=20>indentation</p>//文本缩进[/b]