CFDictionaryRef valueAttributes = NULL;
OSStatus results = SecItemCopyMatching((__bridge CFDictionaryRef)query,
(CFTypeRef *)&valueAttributes);
NSDictionary *attributes =
(__bridge_transfer NSDictionary *)valueAttributes;
if (results == errSecSuccess){
NSString *key, *accessGroup, *creationDate, *modifiedDate, *service;
key = attributes[(__bridge id)kSecAttrAccount];
accessGroup = attributes[(__bridge id)kSecAttrAccessGroup];
creationDate = attributes[(__bridge id)kSecAttrCreationDate];
modifiedDate = attributes[(__bridge id)kSecAttrModificationDate];
service = attributes[(__bridge id)kSecAttrService];
NSLog(@"Key = %@\n \
Access Group = %@\n \
Creation Date = %@\n \
Modification Date = %@\n \
Service = %@", key, accessGroup, creationDate,
modifiedDate, service);
} else {
NSLog(@"Error happened with code: %ld", (long)results);
}
self.window = [[UIWindow alloc]
initWithFrame: [[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
После запуска этого приложения на консоль будут выведены примерно такие результаты:
Key = Full Name
Access Group = F3FU372W5M.com.pixolity.ios.cookbook.SecurityApp
Creation Date = 2013-06-09 10:44:55 +0000
Modification Date = 2013-06-09 10:44:55 +0000
Service = com.pixolity.ios.cookbook.SecurityApp
Это, конечно, хорошо, но как считывать актуальную информацию о значении? В подразделе «Решение» данного раздела я уже ответил на этот вопрос: необходимо включить в запрос ключ kSecReturnData. После того как это будет сделано, в качестве второго параметра функция SecItemCopyMatching потребует либо NULL, либо непрозрачную переменную CFDataRef, вот так:
#import «AppDelegate.h»
#import
@implementation AppDelegate
— (BOOL) application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
NSString *keyToSearchFor = @"Full Name";
NSString *service = [[NSBundle mainBundle] bundleIdentifier];
NSDictionary *query = @{
(__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
(__bridge id)kSecAttrService: service,
(__bridge id)kSecAttrAccount: keyToSearchFor,
(__bridge id)kSecReturnData: (__bridge id)kCFBooleanTrue,
};
CFDataRef cfValue = NULL;
OSStatus results = SecItemCopyMatching((__bridge CFDictionaryRef)query,
(CFTypeRef *)&cfValue);
if (results == errSecSuccess){
NSString *value = [[NSString alloc]
initWithData:(__bridge_transfer NSData *)cfValue
encoding: NSUTF8StringEncoding];
NSLog(@"Value = %@", value);
} else {
NSLog(@"Error happened with code: %ld", (long)results);
}
self.window = [[UIWindow alloc]
initWithFrame: [[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
