1,新建NSString的分类,记得添加加密所需的头文件#import <CommonCrypto/CommonDigest.h> , NSString+MD5.h:
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#import <Foundation/Foundation.h>
#import <CommonCrypto/CommonDigest.h>
@interface NSString (MD5)
+ (NSString *)md5To32bit:(NSString *)str;
@end
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2,编写加密方法:
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#import "NSString+MD5.h"
@implementation NSString (MD5)
+ (NSString *)md5To32bit:(NSString *)str {
const char *cStr = [str UTF8String];
unsigned char digest[CC_MD5_DIGEST_LENGTH];
CC_MD5( cStr, strlen (cStr),digest );
NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
for ( int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
[result appendFormat:@ "%02x" , digest[i]];
return result;
}
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3,在需要加密的字串符当前控制器中导入头文件,并引用该方法:
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#import "ViewController.h"
#import "NSString+MD5.h"
@interface ViewController ()
@end
@implementation ViewController
- ( void )viewDidLoad {
[super viewDidLoad];
NSString *name = @ "Kuture" ;
//加密字符串
NSString *encypt = [NSString md5To32bit:name];
NSLog(@ "\n name: %@\n encypt: %@" ,name,encypt);
}
@end
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运行结果为:
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