将阵列保存在钥匙串中 [英] Save array in Keychain

问题描述

我正在尝试将数组保存在钥匙串中，但是无法将数组转换为NSData.我已经准备好用于保存字符串的函数，但是我不知道如何从数组中获取valueData.

I am trying to save an array in keychain but I can't convert an array to NSData. I have my function prepared for saving strings but I don't know how to get a valueData from an array.

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)")
    }

}

推荐答案

您可以在保存时在数组上使用NSKeyedArchiver.archivedDataWithRootObject，在加载时可以在NSKeyedUnarchiver.unarchiveObjectWithData上使用.

You can use NSKeyedArchiver.archivedDataWithRootObject on your array when saving, and NSKeyedUnarchiver.unarchiveObjectWithData when loading.

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