在Keychain中保存数组

Question

我试图在钥匙串中保存一个数组但我无法将数组转换为NSData.我有我的函数准备保存字符串,但我不知道如何valueData从数组中获取.

func add(key: String, value: AnyObject) {

    let service = NSBundle.mainBundle().bundleIdentifier!

    let valueData: NSData! = value.dataUsingEncoding(NSUTF8StringEncoding,
        allowLossyConversion: false)

    let secItem = [
        kSecClass as String : kSecClassGenericPassword as String,
        kSecAttrService as String : service,
        kSecAttrAccount as String : key,
        kSecValueData as String : valueData
    ]
    let result: UnsafeMutablePointer<AnyObject?> = nil
    let status = Int(SecItemAdd(secItem, result))

    if status == Int(errSecDuplicateItem){
        self.update(key, newData: value)
    } else {
        print("An error occurred with code \(status)")
    }

}

Answer 1

您可以使用NSKeyedArchiver和NSKeyedUnarchiver将NSArrays和NSDictionaries转换为数据:

let array : NSArray = ["one", "two"]
let data = NSKeyedArchiver.archivedDataWithRootObject(array)

let arrayFromData = NSKeyedUnarchiver.unarchiveObjectWithData(data) as! NSArray

Answer 2

您可以在保存和加载时NSKeyedArchiver.archivedDataWithRootObject在数组上使用。NSKeyedUnarchiver.unarchiveObjectWithData