iOS中使用MD5加密字符串
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:
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