xcode - 类型 'CFStringRef' 不符合 Xcode 6.1 中的协议(protocol) 'Hashable'

Question

在我的应用程序中，我有一个在 Xcode 6 中工作的钥匙串(keychain)访问类，但现在在 Xcode 6.1 中我遇到了一些错误，这是第一个错误:类型 'CFStringRef' 不符合协议(protocol) 'Hashable':

private class func updateData(value: NSData, forKey keyName: String) -> Bool {
    let keychainQueryDictionary: NSMutableDictionary = self.setupKeychainQueryDictionaryForKey(keyName)

    let updateDictionary = [kSecValueData:value] //HERE IS THE ERROR

    // Update
    let status: OSStatus = SecItemUpdate(keychainQueryDictionary, updateDictionary)

    if status == errSecSuccess {
        return true
    } else {
        return false
    }
}

我也收到与第一个错误类似的错误，但它是:Type 'CFStringRef' does not conform to protocol 'NSCopying' 这是我收到此错误的部分:

private class func setupKeychainQueryDictionaryForKey(keyName: String) -> NSMutableDictionary {
    // Setup dictionary to access keychain and specify we are using a generic password (rather than a certificate, internet password, etc)

    var keychainQueryDictionary: NSMutableDictionary = [kSecClass:kSecClassGenericPassword] 

    // HERE IS THE ERROR ↑↑↑

    // Uniquely identify this keychain accessor
    keychainQueryDictionary[kSecAttrService as String] = KeychainWrapper.serviceName

    // Uniquely identify the account who will be accessing the keychain
    var encodedIdentifier: NSData? = keyName.dataUsingEncoding(NSUTF8StringEncoding)

    keychainQueryDictionary[kSecAttrGeneric as String] = encodedIdentifier
    keychainQueryDictionary[kSecAttrAccount as String] = encodedIdentifier

    return keychainQueryDictionary
}

有人能告诉我如何解决这些错误吗？

Answer 1

CFStringRef 与 NSString 桥接，后者与 String 桥接。最简单的解决方案是将 kSecValueData 和 kSecClass 转换为 String 或 NSString:

这里:

let updateDictionary = [kSecValueData as String: value]

在这里:

var keychainQueryDictionary: NSMutableDictionary = [kSecClass as NSString: kSecClassGenericPassword]