最简单的来源
import Foundationimport Security// Constant Identifierslet userAccount = "AuthenticatedUser"let accessGroup = "SecuritySerivice"let passwordKey = "KeyForPassword"// Arguments for the keychain querieslet kSecClassValue = NSString(format: kSecClass)let kSecAttrAccountValue = NSString(format: kSecAttrAccount)let kSecValueDataValue = NSString(format: kSecValueData)let kSecClassGenericPasswordValue = NSString(format: kSecClassGenericPassword)let kSecAttrServicevalue = NSString(format: kSecAttrService)let kSecMatchLimitValue = NSString(format: kSecMatchLimit)let kSecReturnDataValue = NSString(format: kSecReturnData)let kSecMatchLimitonevalue = NSString(format: kSecMatchLimitOne)public class KeychainService: NSObject { public class func savePassword(token: NSString) { self.save(passwordKey, data: token) } public class func loadPassword() -> NSString? { return self.load(passwordKey) } private class func save(service: NSString, data: NSString) { let dataFromString: NSData = data.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)! // Instantiate a new default keychain query let keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, userAccount, dataFromString], forKeys: [kSecClassValue, kSecAttrServicevalue, kSecAttrAccountValue, kSecValueDataValue]) // Delete any existing items SecItemDelete(keychainQuery as CFDictionaryRef) // Add the new keychain item SecItemAdd(keychainQuery as CFDictionaryRef, nil) } private class func load(service: NSString) -> NSString? { // Instantiate a new default keychain query // Tell the query to return a result // Limit our results to one item let keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, userAccount, kCFBooleanTrue, kSecMatchLimitOnevalue], forKeys: [kSecClassValue, kSecAttrServicevalue, kSecAttrAccountValue, kSecReturnDataValue, kSecMatchLimitValue]) var dataTypeRef :AnyObject? // Search for the keychain items let status: OSStatus = SecItemCopyMatching(keychainQuery, &dataTypeRef) var contentsOfKeychain: NSString? = nil if status == errSecSuccess { if let retrievedData = dataTypeRef as? NSData { contentsOfKeychain = NSString(data: retrievedData, encoding: NSUTF8StringEncoding) } } else { print("Nothing was retrieved from the keychain. Status pre (status)") } return contentsOfKeychain }}通话范例
KeychainService.savePassword("Pa55worD")let password = KeychainService.loadPassword() // password = "Pa55worD"SWIFT 4：具有更新和删除密码的版本
import Cocoaimport Security// see https://stackoverflow.com/a/37539998/1694526// Arguments for the keychain querieslet kSecClassValue = NSString(format: kSecClass)let kSecAttrAccountValue = NSString(format: kSecAttrAccount)let kSecValueDataValue = NSString(format: kSecValueData)let kSecClassGenericPasswordValue = NSString(format: kSecClassGenericPassword)let kSecAttrServicevalue = NSString(format: kSecAttrService)let kSecMatchLimitValue = NSString(format: kSecMatchLimit)let kSecReturnDataValue = NSString(format: kSecReturnData)let kSecMatchLimitonevalue = NSString(format: kSecMatchLimitOne)public class KeychainService: NSObject { class func updatePassword(service: String, account:String, data: String) { if let dataFromString: Data = data.data(using: String.Encoding.utf8, allowLossyConversion: false) { // Instantiate a new default keychain query let keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, account], forKeys: [kSecClassValue, kSecAttrServicevalue, kSecAttrAccountValue]) let status = SecItemUpdate(keychainQuery as CFDictionary, [kSecValueDataValue:dataFromString] as CFDictionary) if (status != errSecSuccess) { if let err = SecCopyErrorMessageString(status, nil) { print("Read failed: (err)") } } } } class func removePassword(service: String, account:String) { // Instantiate a new default keychain query let keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, account, kCFBooleanTrue], forKeys: [kSecClassValue, kSecAttrServicevalue, kSecAttrAccountValue, kSecReturnDataValue]) // Delete any existing items let status = SecItemDelete(keychainQuery as CFDictionary) if (status != errSecSuccess) { if let err = SecCopyErrorMessageString(status, nil) { print("Remove failed: (err)") } } } class func savePassword(service: String, account:String, data: String) { if let dataFromString = data.data(using: String.Encoding.utf8, allowLossyConversion: false) { // Instantiate a new default keychain query let keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, account, dataFromString], forKeys: [kSecClassValue, kSecAttrServicevalue, kSecAttrAccountValue, kSecValueDataValue]) // Add the new keychain item let status = SecItemAdd(keychainQuery as CFDictionary, nil) if (status != errSecSuccess) { // Always check the status if let err = SecCopyErrorMessageString(status, nil) { print("Write failed: (err)") } } } } class func loadPassword(service: String, account:String) -> String? { // Instantiate a new default keychain query // Tell the query to return a result // Limit our results to one item let keychainQuery: NSMutableDictionary = NSMutableDictionary(objects: [kSecClassGenericPasswordValue, service, account, kCFBooleanTrue, kSecMatchLimitOnevalue], forKeys: [kSecClassValue, kSecAttrServicevalue, kSecAttrAccountValue, kSecReturnDataValue, kSecMatchLimitValue]) var dataTypeRef :AnyObject? // Search for the keychain items let status: OSStatus = SecItemCopyMatching(keychainQuery, &dataTypeRef) var contentsOfKeychain: String? if status == errSecSuccess { if let retrievedData = dataTypeRef as? Data { contentsOfKeychain = String(data: retrievedData, encoding: String.Encoding.utf8) } } else { print("Nothing was retrieved from the keychain. Status pre (status)") } return contentsOfKeychain }}您需要想象以下内容连接到文本输入字段和标签，然后连接四个按钮，每种方法一个。
class ViewController: NSViewController { @IBOutlet weak var enterPassword: NSTextField! @IBOutlet weak var retrievedPassword: NSTextField! let service = "myService" let account = "myAccount" // will only work after @IBAction func updatePassword(_ sender: Any) { KeychainService.updatePassword(service: service, account: account, data: enterPassword.stringValue) } @IBAction func removePassword(_ sender: Any) { KeychainService.removePassword(service: service, account: account) } @IBAction func passwordSet(_ sender: Any) { let password = enterPassword.stringValue KeychainService.savePassword(service: service, account: account, data: password) } @IBAction func passwordGet(_ sender: Any) { if let str = KeychainService.loadPassword(service: service, account: account) { retrievedPassword.stringValue = str } else {retrievedPassword.stringValue = "Password does not exist" } }}斯威夫特5
迅捷的Kosuke 版本 5
import Securityclass KeyChain { class func save(key: String, data: Data) -> OSStatus { let query = [ kSecClass as String : kSecClassGenericPassword as String, kSecAttrAccount as String : key, kSecValueData as String : data ] as [String : Any] SecItemDelete(query as CFDictionary) return SecItemAdd(query as CFDictionary, nil) } class func load(key: String) -> Data? { let query = [ kSecClass as String : kSecClassGenericPassword, kSecAttrAccount as String : key, kSecReturnData as String : kCFBooleanTrue!, kSecMatchLimit as String : kSecMatchLimitOne ] as [String : Any] var dataTypeRef: AnyObject? = nil let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef) if status == noErr { return dataTypeRef as! Data? } else { return nil } } class func createUniqueID() -> String { let uuid: CFUUID = CFUUIDCreate(nil) let cfStr: CFString = CFUUIDCreateString(nil, uuid) let swiftString: String = cfStr as String return swiftString }}extension Data { init<T>(from value: T) { var value = value self.init(buffer: UnsafeBufferPointer(start: &value, count: 1)) } func to<T>(type: T.Type) -> T { return self.withUnsafeBytes { $0.load(as: T.self) } }}用法示例：
let int: Int = 555let data = Data(from: int)let status = KeyChain.save(key: "MyNumber", data: data)print("status: ", status)if let receivedData = KeyChain.load(key: "MyNumber") { let result = receivedData.to(type: Int.self) print("result: ", result)}
