카카오톡 로그인 API 구현

 

 

 

카카오톡 로그인 API 설정 

 

https://developers.kakao.com/docs/latest/ko/kakaologin/common

Kakao Developers

 

 

기본 설정은 위의 사이트에 들어가서 한다. 

 

그 외의 파일은 아래 코드를 구현한다. 

 

AppDelegate.swift 코드 구현

import UIKit
import CoreData
import KakaoSDKCommon
import KakaoSDKAuth

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    
    func application(
        _ app: UIApplication,
        open url: URL,
        options: [UIApplication.OpenURLOptionsKey : Any] = [:]
    ) -> Bool {
        if AuthApi.isKakaoTalkLoginUrl(url) {
            return AuthController.handleOpenUrl(url: url)
        }
        return false
    }


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        let nativeAppKey = Bundle.main.infoDictionary?["KAKAO_NATIVE_APP_KEY"] ?? ""
        KakaoSDK.initSDK(appKey: nativeAppKey as! String)
        return true
    }
    ...

 

 

SceneDelegate.swift 코드 구현

import UIKit
import KakaoSDKAuth

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?
    
    func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
        if let url = URLContexts.first?.url {
            if (AuthApi.isKakaoTalkLoginUrl(url)) {
                _ = AuthController.handleOpenUrl(url: url)
            }
        }
    }


    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

        guard let windowScene = (scene as? UIWindowScene) else { return }
            
        window = UIWindow(windowScene: windowScene)
        window?.rootViewController = HomeViewController()
        window?.makeKeyAndVisible()

    }
    ...

 

 

HomeViewController.swift 코드 구현

import UIKit
import KakaoSDKAuth
import KakaoSDKUser

class HomeViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        checkLoginStatus()
        
    }

    func setupUI() {
        view.backgroundColor = .white

        let logoutButton = UIButton(type: .system)
        logoutButton.setTitle("카카오 로그아웃", for: .normal)
        logoutButton.addTarget(self, action: #selector(logoutFromKakao), for: .touchUpInside)
        logoutButton.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(logoutButton)

        let profileButton = UIButton(type: .system)
        profileButton.setTitle("프로필 가져오기", for: .normal)
        profileButton.addTarget(self, action: #selector(fetchProfile), for: .touchUpInside)
        profileButton.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(profileButton)

        NSLayoutConstraint.activate([
            logoutButton.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            logoutButton.centerYAnchor.constraint(equalTo: view.centerYAnchor),
            profileButton.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            profileButton.topAnchor.constraint(equalTo: logoutButton.bottomAnchor, constant: 20)
        ])
    }
    
    // 초기 로그인 여부를 확인 함수
    func checkLoginStatus() {
        if !UserApi.isKakaoTalkLoginAvailable() {
            let loginVC = LoginViewController()
            loginVC.modalPresentationStyle = .overFullScreen
            loginVC.delegate = self
            present(loginVC, animated: true, completion: nil)
        }
    }

    @objc func logoutFromKakao() {
        UserApi.shared.logout { (error) in
            if let error = error {
                print(error)
            } else {
                print("logout() success.")
                self.checkLoginStatus()
            }
        }
        
        
    }

    @objc func fetchProfile() {
        UserApi.shared.me() { (user, error) in
            if let error = error {
                print(error)
            } else {
                print("me() success.")
                if let user = user {
                    print("ID: \(user.id ?? 0)")
                    print("닉네임: \(user.kakaoAccount?.profile?.nickname ?? "None")")
                    print("프로필 이미지 URL: \(user.kakaoAccount?.profile?.profileImageUrl?.absoluteString ?? "None")")
                }
            }
        }
    }
}

extension HomeViewController: LoginViewControllerDelegate {
    func loginViewControllerDidFinish(_ controller: LoginViewController) {
        controller.dismiss(animated: true, completion: nil)
    }
}

 

 

LoginViewController.swift 코드 구현

import UIKit
import KakaoSDKAuth
import KakaoSDKUser

protocol LoginViewControllerDelegate: AnyObject {
    func loginViewControllerDidFinish(_ controller: LoginViewController)
}

class LoginViewController: UIViewController {

    weak var delegate: LoginViewControllerDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
    }

    func setupUI() {
        view.backgroundColor = UIColor(white: 0, alpha: 0.5)

        let containerView = UIView()
        containerView.backgroundColor = .white
        containerView.layer.cornerRadius = 10
        containerView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(containerView)

        let loginButton = UIButton(type: .system)
        loginButton.setTitle("카카오 로그인", for: .normal)
        loginButton.addTarget(self, action: #selector(loginWithKakao), for: .touchUpInside)
        loginButton.translatesAutoresizingMaskIntoConstraints = false
        containerView.addSubview(loginButton)

        NSLayoutConstraint.activate([
            containerView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            containerView.centerYAnchor.constraint(equalTo: view.centerYAnchor),
            containerView.widthAnchor.constraint(equalToConstant: 300),
            containerView.heightAnchor.constraint(equalToConstant: 200),

            loginButton.centerXAnchor.constraint(equalTo: containerView.centerXAnchor),
            loginButton.centerYAnchor.constraint(equalTo: containerView.centerYAnchor)
        ])
    }

    @objc func loginWithKakao() {
        if UserApi.isKakaoTalkLoginAvailable() {
            UserApi.shared.loginWithKakaoTalk { [weak self] (oauthToken, error) in
                if let error = error {
                    print(error)
                } else {
                    print("loginWithKakaoTalk() success.")
                    _ = oauthToken
                    self?.delegate?.loginViewControllerDidFinish(self!)
                }
            }
        } else {
            UserApi.shared.loginWithKakaoAccount { [weak self] (oauthToken, error) in
                if let error = error {
                    print(error)
                } else {
                    print("loginWithKakaoAccount() success.")
                    _ = oauthToken
                    self?.delegate?.loginViewControllerDidFinish(self!)
                }
            }
        }
    }
}