编辑1:我尝试了一个更基本的设置,因为我以为我的self.defaultKeychainquery可能已经搞砸了.我已将以下代码更新为最新版本.
编辑2:得到它的工作.我没有正确地将数据值添加到保存查询.我需要将字符串转换为NSData.我已将以下代码更新为最新的工作版本.
编辑3:由于Xerxes在下面指出,因为字典的一些问题,此代码不适用于高于Beta 1的Xcode版本.如果你知道这是一个修复,请让我知道.
更新:我把它变成了keychain library written in Swift called Locksmith.
保存
class func save(service: Nsstring,data: Nsstring) { var dataFromString: NSData = data.dataUsingEnCoding(NSUTF8StringEnCoding,allowLossyConversion: false) // Instantiate a new default keychain query var keychainquery: NSMutableDictionary = NSMutableDictionary(objects: [kSecclassGenericPassword,service,userAccount,dataFromString],forKeys: [kSecclass,kSecAttrService,kSecAttrAccount,kSecValueData]) // Delete any existing items SecItemDelete(keychainquery as CFDictionaryRef) // Add the new keychain item var status: Osstatus = SecItemAdd(keychainquery as CFDictionaryRef,nil) // Check that it worked ok println("Saving status code is: \(status)")}
加载
class func load(service: Nsstring) -> AnyObject? { // Instantiate a new default keychain query // Tell the query to return a result // limit our results to one item var keychainquery: NSMutableDictionary = NSMutableDictionary(objects: [kSecclassGenericPassword,kcfBooleanTrue,kSecMatchlimitOne],kSecReturnData,kSecMatchlimit]) // I'm not too sure what's happening here... var dataTypeRef :Unmanaged<AnyObject>? // Search for the keychain items let status: Osstatus = SecItemcopyMatching(keychainquery,&dataTypeRef) println("Loading status code is: \(status)") // I'm not too sure what's happening here... let opaque = dataTypeRef?.toOpaque() if let op = opaque? { let retrIEvedData = Unmanaged<NSData>.fromOpaque(op).takeUnretainedValue() println("RetrIEved the following data from the keychain: \(retrIEvedData)") var str = Nsstring(data: retrIEvedData,enCoding: NSUTF8StringEnCoding) println("The decoded string is \(str)") } else { println("nothing was retrIEved from the keychain.") } return nil }
用法(查看控制器)
KeychainService.savetoken("sometoken")KeychainService.loadToken()
使用这些方便的方法
class func savetoken(token: Nsstring) { self.save("service",data: token) }class func loadToken() { var token = self.load("service") if let t = token { println("The token is: \(t)") } }
这导致控制台中的输出:
Saving status code is: 0Loading status code is: 0RetrIEved the following data from the keychain: <736f6d65 746f6b65 6e>The decoded string is sometoken
非常感谢你的帮助.我不太确定一旦获得了它,或者如果它有任何数据给上面的代码,该如何处理dataTypeRef.
为了使其正常工作,您将需要检索钥匙串常量的保留值并存储,首先如下所示:let kSecclassValue = kSecclass.takeRetainedValue() as Nsstringlet kSecAttrAccountValue = kSecAttrAccount.takeRetainedValue() as Nsstringlet kSecValueDataValue = kSecValueData.takeRetainedValue() as Nsstringlet kSecclassGenericPasswordValue = kSecclassGenericPassword.takeRetainedValue() as Nsstringlet kSecAttrServiceValue = kSecAttrService.takeRetainedValue() as Nsstringlet kSecMatchlimitValue = kSecMatchlimit.takeRetainedValue() as Nsstringlet kSecReturnDataValue = kSecReturnData.takeRetainedValue() as Nsstringlet kSecMatchlimitOneValue = kSecMatchlimitOne.takeRetainedValue() as Nsstring
然后,您可以引用NSMutableDictionary中的值,如下所示:
var keychainquery: NSMutableDictionary = NSMutableDictionary(objects: [kSecclassGenericPasswordValue,kSecMatchlimitOneValue],forKeys: [kSecclassValue,kSecAttrServiceValue,kSecAttrAccountValue,kSecReturnDataValue,kSecMatchlimitValue])
我写了一篇关于它的博文:
http://rshelby.com/2014/08/using-swift-to-save-and-query-ios-keychain-in-xcode-beta-4/
希望这可以帮助!
rshelby
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