Keychain简单使用

#import <Foundation/Foundationh>

#import <Security/Securityh>

  

@interface MyKeychain : NSObject

  

+ (BOOL)save:(NSString*)service data:(id)data;

+ (id)load:(NSString*)service;

+ (void)delete:(NSString*)service;

  

@end

b）MyKeychainm

//

// MyKeychainm

// UUIDdemo

//

// Created by 555chy on 6/10/

// Copyright © 2016 555chy All rights reserved

//

  

#import "MyKeychainh"

  

@implementation MyKeychain

  

+ (NSMutableDictionary*) getKeychainQuery: (NSString*)service {

  return [NSMutableDictionary dictionaryWithObjectsAndKeys:

    (id)kSecClassGenericPassword, (id)kSecClass,

    service, (id)kSecAttrService,

    service, (id)kSecAttrAccount,

    (id)kSecAttrAccessibleAfterFirstUnlock, (id)kSecAttrAccessible,

   nil nil];

}

    //service ：Key data :value

+ (BOOL) save:(NSString*)service data:(id)data {

  NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];

  SecItemDelete((CFDictionaryRef)keychainQuery);

  [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];

  return SecItemAdd((CFDictionaryRef)keychainQuery, NULL) == noErr;

}

  //加载by KEY

+ (id) load:(NSString*)service {

  id ret = NULL;

  NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];

  [keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];

  [keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];

  NSData *keyData = NULL;

  if(SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef*)(void*)&keyData) == noErr) {

    @try {

      ret = [NSKeyedUnarchiver unarchiveObjectWithData:keyData];

    }

    @catch (NSException *exception) {

      NSLog(@"Unarchive of %@ failed: %@", service, exception);

    }

    @finally {

    }

  }

  return ret;

}

  //删除by Key

+ (void) delete:(NSString*)service {

  NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];

  SecItemDelete((CFDictionaryRef)keychainQuery);

}

  

@end