Scanner,UIGraphicsBeginImageContext,CGContextRef,
Scanner请跳转至:http://blog.sina.com.cn/s/blog_70854cfb01013uqc.htmlUIGraphicsBeginImageContext请跳转至:http://blog.sina.com.cn/s/blog_5fb39f9101017n1v.htmlCGContextRef请跳转至:http://www.cnblogs.com/likwo/archiv