在应用程序启动后请求通知权限时，不会调用 didRegisterForRemoteNotificationsWithDeviceToken

Question

我正在关注这里的推送通知教程： https://www.raywenderlich.com/11395893-push-notifications-tutorial-getting-started

我已经在测试设备上完成了所有工作，在允许通知后，我可以在 didRegisterForRemoteNotificationsWithDeviceToken 运行s 时获取设备令牌。

现在我想在请求通知权限时更改。我不想像教程中那样请求用户允许应用程序启动通知。我只想稍后再问，一旦用户登录。但是，当我调用 AppDelegate 注册通知时，它会提示用户，但是当他们接受时，它不会运行 didRegisterForRemoteNotificationsWithDeviceToken 函数，它具有我需要发送到后端的设备令牌。给出了什么？

AppDelegate.swift

import SwiftUI
import UserNotifications

class AppDelegate: NSObject, UIApplicationDelegate {
    @EnvironmentObject var authenticatedUser: AuthenticatedUser
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        return true
    }
    
    func registerForPushNotifications() {
        UNUserNotificationCenter.current()
            .requestAuthorization(
                options: [.alert, .sound, .badge]) { [weak self] granted, _ in
                print("Permission granted: \(granted)")
                guard granted else { return }
                self?.getNotificationSettings()
            }
    }
    
    func getNotificationSettings() {
        UNUserNotificationCenter.current().getNotificationSettings { settings in
            print("Notification settings: \(settings)")
            guard settings.authorizationStatus == .authorized else { return }
            DispatchQueue.main.async {
                UIApplication.shared.registerForRemoteNotifications()
            }
        }
    }
    
    // this function never gets called!
    func application(
        _ application: UIApplication,
        didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data
    ) {
        let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) }
        let token = tokenParts.joined()
        print("Device Token: \(token)")
        
        // send token to backend here
    }
    
    func application(
      _ application: UIApplication,
      didFailToRegisterForRemoteNotificationsWithError error: Error
    ) {
      print("Failed to register: \(error)")
    }
}

MyGroupView.swift我要提示通知权限的地方

import SwiftUI

struct MyGroupView: View {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    @EnvironmentObject var authenticatedUser: AuthenticatedUser
    
    // other variables and state here...
    
    var body: some View {
        GeometryReader { proxy in
            VStack {
                // content here...
            }
            .onAppear() {
                appDelegate.registerForPushNotifications()
            }
            .edgesIgnoringSafeArea(.bottom)
        }
    }
    
    // other functions...
}

Answer 1

在您的 AppDelegates didFinishLaunchingWithOptions 中，您需要设置委托

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
    UNUserNotificationCenter.current().delegate = self
    return true
}

在应用程序启动后请求通知权限时，不会调用 didRegisterForRemoteNotificationsWithDeviceToken

didRegisterForRemoteNotificationsWithDeviceToken isn't called when requesting notification permission after app launch

ios

swift

push-notification

apple-push-notifications