iOS中使用MD5加密字符串

2020-07-26 03:19:31

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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:

#import <Foundation/Foundation.h>#import <CommonCrypto/CommonDigest.h>@interface NSString (MD5)+ (NSString *)md5To32bit:(NSString *)str;@end

2,编写加密方法：

#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：

#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：