iOSアプリにLINEログインを組み込む

// AppDelegate.swift
import LineSDK

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Add this to your "didFinishLaunching" delegate method.
    LoginManager.shared.setup(channelID: "YOUR_CHANNEL_ID", universalLinkURL: nil)

    return true
}

// AppDelegate.swift
func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
    return LoginManager.shared.application(app, open: url)
}

// SceneDelegate.swift
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
    _ = LoginManager.shared.application(.shared, open: URLContexts.first?.url)
}

// In your view controller
override func viewDidLoad() {
    super.viewDidLoad()

    // Create Login Button.
    let loginButton = LoginButton()
    loginButton.delegate = self

    // Configuration for permissions and presenting.
    loginButton.permissions = [.profile]
    loginButton.presentingViewController = self

    // Add button to view and layout it.
    view.addSubview(loginButton)
    loginButton.translatesAutoresizingMaskIntoConstraints = false
    loginButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
    loginButton.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
}

extension LoginViewController: LoginButtonDelegate {
    func loginButton(_ button: LoginButton, didSucceedLogin loginResult: LoginResult) {
        hideIndicator()
        print("Login Succeeded.")
    }

    func loginButton(_ button: LoginButton, didFailLogin error: LineSDKError) {
        hideIndicator()
        print("Error: \(error)")
    }

    func loginButtonDidStartLogin(_ button: LoginButton) {
        showIndicator()
        print("Login Started.")
    }
}

// LoginViewController.swift

import LineSDK

class LoginViewController: UIViewController {
    override func viewDidLoad() {
        //...
    }

    func login() {
        LoginManager.shared.login(permissions: [.profile], in: self) {
            result in
            switch result {
            case .success(let loginResult):
                print(loginResult.accessToken.value)
                // Do other things you need with the login result
            case .failure(let error):
                print(error)
            }
        }
    }
}

case .success(let loginResult):
    let profileEnabled = loginResult.permissions.contains(.profile)

LoginManager.shared.login(permissions: [.profile], in: self) {
    result in
    switch result {
    case .success(let loginResult):
        if let profile = loginResult.userProfile {
            print("User ID: \(profile.userID)")
            print("User Display Name: \(profile.displayName)")
            print("User Icon: \(String(describing: profile.pictureURL))")
        }
    case .failure(let error):
        print(error)
    }
}

LoginManager.shared.login(permissions: [.profile], in: self) {
    result in
    switch result {
    case .success(let loginResult):
        let token = loginResult.accessToken.value
        // Send `token` to your server.
    case .failure(let error):
        print(error)