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 |
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; } |
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 |
运行结果为:
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