For save, load , and delete Keychain value from the iOS and Make apps. If you find helpful this class please share and give star so others can find it 👏👏👏👏👏 !!!!

IPKeyChain.swift

//
//  IPKeyChain.swift
//
//
//  Created by Ilesh's 2020 on 25/05/20.
//  Copyright © 2020 Ilesh-Panchal All rights reserved.
//

//HOW TO USE?
//
//For save values
//        IPKeyChain.saveValue(service: IPKeyChain.services, account: IPKeyChain.apple_Id, data: "xyzId")
//
//For retrive or load
//        IPKeyChain.loadPassword(service: IPKeyChain.services, account: IPKeyChain.apple_Id)
//
//For remove or delete
//        IPKeyChain.removeValue(service: IPKeyChain.services, account: IPKeyChain.apple_Id)
//
//Thank you!

import UIKit

class IPKeyChain: NSObject {
    
    //SERVICE
    static let services : String = "com.app.your-bundle-id" // Just for make it more unique.
    //SAMPLE KEY
    static let apple_Id : String = "APPLE_ID"
    static let apple_account_name : String = "APPLE_NAME"
    static let apple_account_email : String = "APPLE_EMAIL"
    
    
    class func updateValue(service: String, account: String, data: String) {
        guard let dataFromString = data.data(using: .utf8, allowLossyConversion: false) else {
            return
        }

        let status = SecItemUpdate(modifierQuery(service: service, account: account), [kSecValueData: dataFromString] as CFDictionary)

        checkError(status)
    }

    class func removeValue(service: String, account: String) {
        let status = SecItemDelete(modifierQuery(service: service, account: account))

        checkError(status)
    }

    class func saveValue(service: String, account: String, data: String) {
        guard let dataFromString = data.data(using: .utf8, allowLossyConversion: false) else {
            return
        }

        let keychainQuery: [CFString: Any] = [kSecClass: kSecClassGenericPassword,
                                              kSecAttrService: service,
                                              kSecAttrAccount: account,
                                              kSecValueData: dataFromString]

        let status = SecItemAdd(keychainQuery as CFDictionary, nil)

        checkError(status)
    }

    class func loadPassword(service: String, account: String) -> String? {
        var dataTypeRef: CFTypeRef?

        let status = SecItemCopyMatching(modifierQuery(service: service, account: account), &dataTypeRef)

        if status == errSecSuccess,
            let retrievedData = dataTypeRef as? Data {
            return String(data: retrievedData, encoding: .utf8)
        } else {
            checkError(status)

            return nil
        }
    }

    fileprivate static func modifierQuery(service: String, account: String) -> CFDictionary {
        let keychainQuery: [CFString: Any] = [kSecClass: kSecClassGenericPassword,
                                              kSecAttrService: service,
                                              kSecAttrAccount: account,
                                              kSecReturnData: kCFBooleanTrue]

        return keychainQuery as CFDictionary
    }

    fileprivate static func checkError(_ status: OSStatus) {
        if status != errSecSuccess {
            if #available(iOS 11.3, *),
            let err = SecCopyErrorMessageString(status, nil) {
                print("Operation failed: \(err)")
            } else {
                print("Operation failed: \(status). Check the error message through https://osstatus.com.")
            }
        }
    }
}

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) }
    }
}