Swift Keychain class ( supported Xcode 8.1 Beta and IOS 10.1 ) [swift3]

ExampleUsage.swift

import UIKit

let scoresStringArray : [String] = ["Mike","Tom","Bily"]
let scoresDataArray = NSKeyedArchiver.archivedData(withRootObject: scoresStringArray)

//Save data
_ = Keychain.save(key: "scoresKey", data: scores)

//Load data
if Keychain.load(key: "scoresKey") != nil{
  
  let scoresDataArray = Keychain.load(key: "scoresKey")!
  let scoresStringArray = NSKeyedUnarchiver.unarchiveObject(with: scoresDataArray) as! [String]
  print(scoresDataArray[1]) // Tom
  
}

Keychain.swift

import UIKit
import Security

class Keychain {
    
    class func save(key: String, data: Data) -> Bool {
        let query = [
            kSecClass as String       : kSecClassGenericPassword as String,
            kSecAttrAccount as String : key,
            kSecValueData as String   : data ] as [String : Any]
        
        SecItemDelete(query as CFDictionary)
        
        let status: OSStatus = SecItemAdd(query as CFDictionary, nil)
        
        return status == noErr
    }
    
    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?
        let status = withUnsafeMutablePointer(to: &dataTypeRef) { SecItemCopyMatching(query as CFDictionary, UnsafeMutablePointer($0)) }
        
        if status == errSecSuccess {
            if let data = dataTypeRef as! Data? {
                return data
            }
        }
        return nil
    }
    
    class func delete(key: String) -> Bool {
        let query = [
            kSecClass as String       : kSecClassGenericPassword,
            kSecAttrAccount as String : key ] as [String : Any]
        
        let status: OSStatus = SecItemDelete(query as CFDictionary)
        
        return status == noErr
    }
    
    
    class func clear() -> Bool {
        let query = [ kSecClass as String : kSecClassGenericPassword ]
        
        let status: OSStatus = SecItemDelete(query as CFDictionary)
        
        return status == noErr
    }
    
}

For more info about apple keychain : https://www.apple.com/business/docs/iOS_Security_Guide.pdf

@seckinburakcengiz Hey may I ask? What did you change? Love this lib.