iOS md5加密

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！