簡単なリマインダー（写経）

はじめに

こちらの動画で学習しました。

ソースコード

ViewController.swift

import UserNotifications
import UIKit

class ViewController: UIViewController {

    @IBOutlet var table: UITableView!
    var models = [MyReminder]()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        table.delegate = self
        table.dataSource = self
    }

    @IBAction func didTapAdd() {
        //show add vc
        guard let vc = storyboard?.instantiateViewController(identifier: "add") as? AddViewController else {
            return
        }

        vc.title = "New Reminder"
        vc.navigationItem.largeTitleDisplayMode = .never
        vc.completion = { title, body, date in
            DispatchQueue.main.async {
                self.navigationController?.popToRootViewController(animated: true)
                let new = MyReminder(title: title, date: date, identifier: "id_\(title)")
                self.models.append(new)
                self.table.reloadData()

                let content = UNMutableNotificationContent()
                content.title = title
                content.sound = .default
                content.body = body

                let targetDate = date
                let trigger = UNCalendarNotificationTrigger(dateMatching: Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second], from: targetDate), repeats: false)
                let request = UNNotificationRequest(identifier: "some_long_id", content: content, trigger: trigger)
                UNUserNotificationCenter.current().add(request, withCompletionHandler: { error in
                    if error != nil {
                        print("something went long")
                    }
                })
            }
        }
        navigationController?.pushViewController(vc, animated: true)
    }

    @IBAction func didTapTest() {
        //fire test notification
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler: { succese, error in
            if succese {
                //schedule test
                self.scheduleTest()

            } else if  error != nil { //if let error = errorと何が違うの
                print("error occurred")

            }

        })
    }

    func scheduleTest() {
        let content = UNMutableNotificationContent()
        content.title = "Hello World"
        content.sound = .default
        content.body = "My long body. My long body. My long body."

        let targetDate = Date().addingTimeInterval(10)
        let trigger = UNCalendarNotificationTrigger(dateMatching: Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second], from: targetDate), repeats: false)
        let request = UNNotificationRequest(identifier: "some_long_id", content: content, trigger: trigger)
        UNUserNotificationCenter.current().add(request, withCompletionHandler: { error in
            if error != nil {
                print("something went long")
            }
        })
    }


}

extension ViewController: UITableViewDelegate{

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        table.deselectRow(at: indexPath, animated: true)
    }

}

extension ViewController: UITableViewDataSource{

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return models.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = table.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = models[indexPath.row].title

        let date = models[indexPath.row].date

        let formatter = DateFormatter()
        formatter.dateFormat = "MMM, dd, YYYY at hh:mm a"

        cell.detailTextLabel?.text = formatter.string(from: date)
        return cell
    }

}

struct MyReminder {
    let title: String
    let date: Date
    let identifier: String
}

AddViewController.swift

import UIKit

class AddViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet var titleField: UITextField!
    @IBOutlet var bodyField: UITextField!
    @IBOutlet var datePicker: UIDatePicker!

    public var completion: ((String, String, Date) -> Void)?

    override func viewDidLoad() {
        super.viewDidLoad()
        titleField.delegate = self
        bodyField.delegate = self
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Save", style: .done, target: self, action: #selector(didTapSaveButton))
    }

    @objc func didTapSaveButton() {
        if let titleText = titleField.text, !titleText.isEmpty,
           let bodyText = bodyField.text, !bodyText.isEmpty {

            let targetDate = datePicker.date

            completion?(titleText, bodyText, targetDate)
        }
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
}

ほぼそのまま載せるのダメだったらすぐ対応しますので教えていただけるとありがたいです...