md5加密，代码如下：
CJMD5.h
#import <Foundation/Foundation.h>
@interface CJMD5 : NSObject
+ (NSString* )md5HexDigest:(NSString* )input;
@end
CJMD5.m
#import "CJMD5.h"
#import <CommonCrypto/CommonDigest.h>
@implementation CJMD5
+ (NSString* )md5HexDigest:(NSString* )input {
const char* str =[input UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5(str, strlen(str), result);
NSMutableString* ret = [NSMutableString stringWithCapacity: CC_MD5_DIGEST_LENGTH];
for(int i=0; i< CC_MD5_DIGEST_LENGTH; i++){
[ret appendFormat:@"%02X", result];
}
return ret;
}
@end
希望对你有帮助！
