/// 漢字 UTF8 互轉(zhuǎn)
NSString* strA = [@"%E4%B8%AD%E5%9B%BD" stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *strB = [@"中國(guó)" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSLog(@"%@",strA); // 中國(guó)
NSLog(@"%@",strB); // %E4%B8%AD%E5%9B%BD
