gistfile1.txt

override func viewDidLoad() {
        super.viewDidLoad()
        var dict : [String: AnyObject] = [:]
        dict[kSecClass] = kSecClassGenericPassword
        dict[kSecMatchLimit] = kSecMatchLimitOne
        dict[kSecReturnAttributes] = true
        var rDict : Unmanaged<AnyObject>?
        let status: OSStatus = SecItemCopyMatching(dict, &rDict)
        if (rDict==nil) {
            println("This behavior only in release mode.")
        }
    }