【Xcode/Swift】ChatGPTのAPIが使えたので簡単なQ&Aアプリを作ってみた

import UIKit
import OpenAISwift

class ChatGPTViewController: UIViewController {

    // MARK: - Properties
    private let openAI = OpenAISwift(authToken: "<#自分のAPIキー#>")

    // MARK: - Outlets
    @IBOutlet private weak var questionTextField: UITextField!
    @IBOutlet private weak var questionSendButton: UIButton!
    @IBOutlet private weak var answerTextView: UITextView!
    @IBOutlet private weak var loadingView: UIActivityIndicatorView!

    // MARK: - View Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        configureView()
    }

    // MARK: Keyboard Dismissal
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        self.view.endEditing(true)
    }

    // MARK: - Private Methods
    private func configureView() {
        questionTextField.delegate = self
        questionSendButton.layer.cornerRadius = 10
        answerTextView.layer.cornerRadius = 10
        answerTextView.isEditable = false
        loadingView.isHidden = true
    }

    private func startAnimation() {
        loadingView.isHidden = false
        loadingView.startAnimating()
    }

    private func stopAnimation() {
        loadingView.stopAnimating()
        loadingView.isHidden = true
    }

    // MARK: - Actions
    @IBAction func sendQuestionToChatGPT(_ sender: Any) {
        questionTextField.resignFirstResponder()
        startAnimation()
        guard let userQuestion = questionTextField.text, !userQuestion.trimmingCharacters(in: .whitespaces).isEmpty else {
            stopAnimation()
            return
        }
        answerTextView.text = "Q: \(userQuestion)"
        print("Request Sent\nQuestion: \(userQuestion)")
        openAI.sendCompletion(with: userQuestion, maxTokens: 500) { [weak self] result in
            switch result {
            case .success(let success):
                print("Request Successful\n-------------------------------------------------")
                DispatchQueue.main.async {
                    self?.answerTextView.text = ("Q: \(userQuestion)\n\(success.choices.first?.text ?? "")")
                    self?.stopAnimation()
                }
            case .failure(let error):
                print("Request Failed: \(error)")
                DispatchQueue.main.async {
                    self?.stopAnimation()
                }
            }
        }
        questionTextField.text = ""
    }

}

// MARK: - Extensions
extension ChatGPTViewController: UITextFieldDelegate {
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }

}