博客

#import “NSString+change.h”

#import <CommonCrypto/CommonDigest.h>

@implementation NSString (change)

//小写

– (NSString*)md532BitLower

{

const char *cStr = [self UTF8String];

unsigned char result[16];

NSNumber *num = [NSNumber numberWithUnsignedLong:strlen(cStr)];

CC_MD5( cStr,[num intValue], result );

return [[NSString stringWithFormat:

@”%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X”,

result[0], result[1], result[2], result[3],

result[4], result[5], result[6], result[7],

result[8], result[9], result[10], result[11],

result[12], result[13], result[14], result[15]

] lowercaseString];

}

//大写

– (NSString*)md532BitUpper

{

const char *cStr = [self UTF8String];

unsigned char result[16];

NSNumber *num = [NSNumber numberWithUnsignedLong:strlen(cStr)];

CC_MD5( cStr,[num intValue], result );

return [[NSString stringWithFormat:

@”%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X”,

result[0], result[1], result[2], result[3],

result[4], result[5], result[6], result[7],

result[8], result[9], result[10], result[11],

result[12], result[13], result[14], result[15]

] uppercaseString];

}

@end