iOS--16进制数据转汉字

//将十六进制字符串转换成汉字

• (NSString)changeLanguage:(NSString)chinese{
  NSString *strResult;
  NSLog(@"chinese:%@",chinese);
  if (chinese.length%2==0) {
  //第二次转换
  NSData *newData = [self hexToByteToNSData:chinese];
  unsigned long encode = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
  strResult = [[NSString alloc] initWithData:newData encoding:encode];
  NSLog(@"strResult:%@",strResult);
  }else{
  NSString *strResult = @"已假定是汉字的转换，所传字符串的长度必须是4的倍数!";
  NSLog(@"%@",strResult);
  return NULL;
  }
  return strResult;
  }