ios - 从未调用过'didRegisterForRemoteNotificationsWithDeviceToken'

Question

我需要协助。
我完全不知道为什么我的通知不起作用。
我的AppDelegate看起来像这样:

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

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

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

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
    
        UNUserNotificationCenter.current().delegate = self
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in
            print("granted: (\(granted)")
        }
    
        UIApplication.shared.registerForRemoteNotifications()
    
        return true
    }

    // MARK: UISceneSession Lifecycle

    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
        // Called when a new scene session is being created.
        // Use this method to select a configuration to create the new scene with.
        return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
    }

    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
        // Called when the user discards a scene session.
        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
    }
}

问题是，永远不会调用函数“didRegisterForRemoteNotificationsWithDeviceToken”。
我还在开发人员帐户中创建了“Apple Push Notification服务SSL证书”，并在Xcode的功能中添加了“Push Notifications”，但仍然无法使用。每次我在“允许”选项卡上单击以允许通知时，都会说“已授予访问权限”，但不会打印出任何设备 token 。 “isRegisterForRemoteNotifications”也返回true。
我还在互联网上搜索了大约2-3个小时，但找不到任何解决方案。
我正在使用Xcode 12 Beta 2和iOS 14 Dev Beta 2。
谢谢。

Answer 1

您需要在真实设备上运行代码，而无法在模拟器上获取 token