Swiftでプッシュ通知を実装するたった12のステップ

// Podfile
platform :ios, '12.0'
target 'YourProjectName' do
  use_frameworks!
  pod 'Firebase/Messaging'
end

import UIKit
import UserNotifications

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        UNUserNotificationCenter.current().delegate = self
        return true
    }
}

import UserNotifications

func requestNotificationAuthorization() {
    let authOptions = UNAuthorizationOptions(arrayLiteral: .alert, .badge, .sound)
    UNUserNotificationCenter.current().requestAuthorization(options: authOptions) { granted, error in
        print("Permission granted: \(granted)")
    }
}

requestNotificationAuthorization()

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  // その他のメソッド

  func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    let token = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
    print("デバイストークン: \(token)")
  }

  // その他のメソッド

}

pod 'Firebase/Core'
pod 'Firebase/Messaging'

import UIKit
import Firebase

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    FirebaseApp.configure()
    return true
  }
}

import UIKit
import Firebase

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    Messaging.messaging().apnsToken = deviceToken
  }
}

import UserNotifications

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
    let content = UNMutableNotificationContent()
    content.title = userInfo["title"] as? String ?? "デフォルトのタイトル"
    content.body = userInfo["body"] as? String ?? "デフォルトの本文"

    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
    let request = UNNotificationRequest(identifier: "notificationID", content: content, trigger: trigger)

    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}

import UserNotifications

func setNotificationActions() {
    let openAction = UNNotificationAction(identifier: "open", title: "開く", options: [.foreground])
    let ignoreAction = UNNotificationAction(identifier: "ignore", title: "無視", options: [.destructive])

    let category = UNNotificationCategory(identifier: "actionCategory", actions: [openAction, ignoreAction], intentIdentifiers: [], options: [])
    UNUserNotificationCenter.current().setNotificationCategories([category])
}

// NotificationService.swift
import UserNotifications

class NotificationService: UNNotificationServiceExtension {

    var contentHandler: ((UNNotificationContent) -> Void)?
    var bestAttemptContent: UNMutableNotificationContent?

    override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
        self.contentHandler = contentHandler
        bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

        if let bestAttemptContent = bestAttemptContent {
            // リモートURLから画像をダウンロードするコード
            // 省略

            contentHandler(bestAttemptContent)
        }
    }
}

// AppDelegate.swift
import UIKit
import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {

        let actionIdentifier = response.actionIdentifier
        if actionIdentifier == "action1" {
            // action1が選択された場合の処理
        } else if actionIdentifier == "action2" {
            // action2が選択された場合の処理
        }

        completionHandler()
    }
}

// AppDelegate.swift
import Firebase
import UIKit
import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        FirebaseApp.configure()
        return true
    }

    // FCMトークン取得時の処理
    func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String?) {
        print("FCM token: \(fcmToken ?? "")")
    }
}

import UserNotifications

func scheduleLocalNotification() {
    // 通知の内容を設定
    let content = UNMutableNotificationContent()
    content.title = "スケジュール通知"
    content.body = "これはスケジュールされた通知です。"

    // 5秒後に通知を送るタイミングを設定
    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)

    // 通知リクエストを作成
    let request = UNNotificationRequest(identifier: "localNotification", content: content, trigger: trigger)

    // 通知をスケジュール
    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}

import UserNotifications

func customSoundNotification() {
    let content = UNMutableNotificationContent()
    content.title = "カスタムサウンド通知"
    content.body = "これはカスタムサウンド付きの通知です。"
    content.sound = UNNotificationSound(named: UNNotificationSoundName(rawValue: "customSound.mp3"))

    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
    let request = UNNotificationRequest(identifier: "customSoundNotification", content: content, trigger: trigger)

    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}

import UserNotifications

func priorityAndCategoryNotification() {
    let content = UNMutableNotificationContent()
    content.title = "重要な通知"
    content.body = "これは高優先度の通知です。"
    content.categoryIdentifier = "highPriority"

    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
    let request = UNNotificationRequest(identifier: "priorityAndCategoryNotification", content: content, trigger: trigger)

    // カテゴリを作成
    let highPriorityCategory = UNNotificationCategory(identifier: "highPriority", actions: [], intentIdentifiers: [], options: .customDismissAction)
    UNUserNotificationCenter.current().setNotificationCategories([highPriorityCategory])

    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}

import UIKit

func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
    print("Failed to register for remote notifications: \(error)")
}

import Alamofire

func sendNotification() {
    let headers: HTTPHeaders = [
        "Authorization": "your_server_key_here",
        "Content-Type": "application/json"
    ]

    let parameters: [String: Any] = [
        "to": "device_token_here",
        "notification": [
            "title": "Test Title",
            "body": "Test Body"
        ]
    ]

    Alamofire.request("https://fcm.googleapis.com/fcm/send", method: .post, parameters: parameters, encoding: JSONEncoding.default, headers: headers).responseJSON { response in
        // handle the response
    }
}

import UserNotifications

let content = UNMutableNotificationContent()
content.title = "お知らせ"
content.subtitle = "新機能追加"
content.body = "アプリに新機能が追加されました。是非チェックしてみてください。"
if let url = Bundle.main.url(forResource: "image", withExtension: "png"), 
   let attachment = try? UNNotificationAttachment(identifier: "image", url: url, options: nil) {
    content.attachments = [attachment]
}

let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
let request = UNNotificationRequest(identifier: "notification-id", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

import FirebaseMessaging

Messaging.messaging().remoteMessageDelegate = self

func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
    let content = UNMutableNotificationContent()
    if let title = remoteMessage.appData["title"] as? String {
        content.title = title
    }
    if let body = remoteMessage.appData["body"] as? String {
        content.body = body
    }

    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
    let request = UNNotificationRequest(identifier: "dynamic-notification", content: content, trigger: trigger)
    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}