푸시 알림 등록하기

푸시가 처음부터 끝까지 작동하는 방식

// Flow: App registers -> APNs returns device token ->
// you send token to your server -> server pushes via APNs

알림 센터

import UserNotifications
let center = UNUserNotificationCenter.current()
// All notification configuration goes through center

권한 요청

import UserNotifications
func requestAuth() async throws -> Bool {
    let center = UNUserNotificationCenter.current()
    return try await center.requestAuthorization(
        options: [.alert, .sound, .badge])
}

APNs에 등록하기

import UIKit
@MainActor
func registerForPush() {
    UIApplication.shared.registerForRemoteNotifications()
}

디바이스 토큰 받기

import UIKit
func application(
    _ app: UIApplication,
    didRegisterForRemoteNotificationsWithDeviceToken
    deviceToken: Data) {
    let token = deviceToken.map {
        String(format: "%02x", $0) }.joined()
    print("APNs token:", token)
    // send token to your backend
}

등록 실패 처리

import UIKit
func application(
    _ app: UIApplication,
    didFailToRegisterForRemoteNotificationsWithError
    error: Error) {
    print("Push registration failed:", error)
}

토큰은 변경될 수 있습니다

// Best practice: register on each launch,
// always upload the freshly received token,
// never cache a token as permanent.
let rule = "re-register every launch"
_ = rule

현재 설정 확인

import UserNotifications
func currentStatus() async -> UNAuthorizationStatus {
    let settings = await UNUserNotificationCenter
        .current().notificationSettings()
    return settings.authorizationStatus
}

임시 권한

import UserNotifications
func requestQuiet() async throws -> Bool {
    try await UNUserNotificationCenter.current()
        .requestAuthorization(
            options: [.alert, .sound, .provisional])
}

필수 기능

// Xcode target > Signing & Capabilities:
//   + Push Notifications
//   + Background Modes > Remote notifications
let caps = "entitlements required"
_ = caps

등록 과정 구성하기

import UIKit
import UserNotifications
func setupPush() async {
    let center = UNUserNotificationCenter.current()
    let granted = (try? await center.requestAuthorization(
        options: [.alert, .sound, .badge])) ?? false
    if granted {
        await MainActor.run {
            UIApplication.shared.registerForRemoteNotifications()
        }
    }
}

빠른 확인

요약