Dead simple keychain wrapper for iOS.

Initialization: ACSimpleKeychain *keychain = [ACSimpleKeychain defaultKeychain];

Storing credentials: // Save credentials for user1 if ([keychain storeUsername:@"user1" password:nil identifier:@"account1" forService:@"twitter"]) { NSLog(@"SAVED credentials for username 'user1' credentials identifier 'account1'"); }

// Save credentials for user2
if ([keychain storeUsername:@"user2" password:@"password" identifier:@"account2" forService:@"twitter"]) {
    NSLog(@"SAVED credentials for username 'user2' credentials identifier 'account2'");
}

// Replace user2 with user3
if ([keychain storeUsername:@"user3" password:@"password" identifier:@"account2" forService:@"twitter"]) {
    NSLog(@"CHANGED credentials for credentials identifier 'account2'");
}    

Retrieving credentials: // Request all credentials for service 'twitter' (max 99 entries) NSArray *all = [keychain allCredentialsForService:@"twitter" limit:99]; NSLog(@"All credentials for service 'twitter %@", all);

// Request credentials for account with username 'user1'
NSDictionary *credentials = [keychain credentialsForUsername:@"user1" service:@"twitter"];
NSLog(@"CREDENTIALS: service: %@, identifier: %@, username: %@, password: %@",
    [credentials valueForKey:ACKeychainService],
    [credentials valueForKey:ACKeychainIdentifier],
    [credentials valueForKey:ACKeychainUsername],
    [credentials valueForKey:ACKeychainPassword]);

// Request credentials for account with identifier 'account2'
credentials = [keychain credentialsForIdentifier:@"account2" service:@"twitter"];
NSLog(@"CREDENTIALS: service: %@, identifier: %@, username: %@, password: %@",
    [credentials valueForKey:ACKeychainService],
    [credentials valueForKey:ACKeychainIdentifier],
    [credentials valueForKey:ACKeychainUsername],
    [credentials valueForKey:ACKeychainPassword]);

Removing credentials: // Delete credentials for account with identifier 'account1' if ([keychain deleteCredentialsForIdentifier:@"account1" service:@"twitter"]) { NSLog(@"DELETED credentials for 'account1'"); }

// Request credentials for account with username 'user3'
if ([keychain deleteCredentialsForUsername:@"user3" service:@"twitter"]) {
    NSLog(@"DELETED credentials for 'user3'");
}

// Delete all account for service MobileMe
if ([keychain deleteAllCredentialsForService:@"MobileMe"]) {
    NSLog(@"DELTED all credentials for service 'MobileMe'");
}