xx.backgroundColor=[UIColor clearColor];

4。url 编码

NSString *strURL = 

@”http://www.google.com/search?

hl=en&newwindow=1&q=如何对 url 编码

&aq=f&oq=&aqi=”;

strURL = [strURL 

stringByAddingPercentEscapesUsingEncoding:NSUT

F8StringEncoding]; //使用 utf8

strURL=[strURLstringByAddingPercentEscapesUsin

gEncoding: 

CFStringConvertEncodingToNSStringEncoding( kCFS

tringEncodingGB_18030_2000)] ;////使用 gb2312

5。转换网页编码 gb2312 -> utf

1.

//编码转换 gb2313 to UTF

2.

NSData * myResponseData = [myRequest 

responseData];

3.

NSStringEncoding enc = 

CFStringConvertEncodingToNSStringEncoding 

(kCFStringEncodingGB_18030_2000);