1.    - (NSString *)QQJXPinxCreator:(NSString *)sha256
    2. {
    4.     NSString * pan = [sha256 substringToIndex:sha256.length/2];
    6.     NSString * pinv = [sha256 substringFromIndex:sha256.length/2];
    8.     if (pan.length != pinv.length)
    10.     {
    12.         return @"生成的sha256字符串位数不是偶数!";
    14.     }
    16.     NSData * Data = [self convertHexStrToData:pan];
    18.     Byte * panByte = (Byte *)[Data bytes];
    20.     NSData * panData = [self convertHexStrToData:pinv];
    22.     Byte * pinvByte = (Byte *)[panData bytes];
    24.     Byte newData[Data.length];
    26.     for (int i = 0; i < Data.length; i++)
    28.     {
    30.         newData[i] = panByte[i]^pinvByte[i];
    32.     }
    34.     NSData * temdatas = [NSData dataWithBytes:newData length:Data.length];
    36.     NSString * temp = [self convertDataToHexStr:temdatas];
    38.     CXTLog(@"tyon = %@",temp);
    40.     return temp;
    42. }
    46. - (NSData*)convertHexStrToData:(NSString*)str
    48. {
    50.     if (!str || [str length] ==0)
    52.     {
    54.         return nil;
    56.     }
    58.     NSMutableData *hexData = [[NSMutableData alloc]initWithCapacity:[str length]*2];
    60.     NSRange range;
    62.     if ([str length] %2==0)
    64.     {
    66.         range = NSMakeRange(0,2);
    68.     } else
    70.     {
    72.         range = NSMakeRange(0,1);
    74.     }
    76.     for (NSInteger i = range.location; i < [str length]; i +=2)
    78.     {
    80.         unsigned int anInt;
    82.         NSString *hexCharStr = [str substringWithRange:range];
    84.         NSScanner *scanner = [[NSScanner alloc]initWithString:hexCharStr];
    86.         [scanner scanHexInt:&anInt];
    88.         NSData *entity = [[NSData alloc]initWithBytes:&anInt length:1];
    90.         [hexData appendData:entity];
    92.         range.location+= range.length;
    94.         range.length=2;
    96.     }
    98.     return hexData;
    100. }
    104. - (NSString*)convertDataToHexStr:(NSData*)data
    106. {
    108.     if (!data || [data length] ==0)
    110.     {
    112.         return @"";
    114.     }
    116.     NSMutableString *string = [[NSMutableString alloc]initWithCapacity:[data length]/2];
    118.     [data enumerateByteRangesUsingBlock:^(const void*bytes,NSRange byteRange,BOOL*stop)
    120.      {
    122.          unsigned char *dataBytes = (unsigned  char*)bytes;
    124.          for (NSInteger i =0; i < byteRange.length; i++)
    126.          {
    128.              NSString *hexStr = [NSString stringWithFormat:@"%x", (dataBytes[i]) & 0xff];
    130.              if ([hexStr length] ==2)
    132.              {
    134.                  [string appendString:hexStr];
    136.              } else
    138.              {
    140.                  [string appendFormat:@"0%@", hexStr];
    142.              }
    144.          }
    146.      }];
    148.     return string;
    150. }