FirebaseApp.configure() 线程 1：信号 SIGABRT

Question

我正在使用 Firebase 和 Cloud Messaging 做一些事情。

问题是我需要在 FirebaseApp.configure() 之前调用 application.registerForRemoteNotifications()。 我读过它应该可以解决我的问题。

我使用从雇主那里得到的项目，FirebaseApp.configure() 是这样调用的：

override init() {
    super.init()
    FirebaseApp.configure()
}

我不知道为什么会这样。

并且 application.registerForRemoteNotifications() 在 application(didFinishLaunchingWithOptions) 中被调用。这是我所拥有的：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    //        FirebaseApp.configure()
    GMSPlacesClient.provideAPIKey("AIzaSyCWMU53OSR4zO28i9e2BsASnda3X1TAS2Y")
    GMSServices.provideAPIKey("AIzaSyCWMU53OSR4zO28i9e2BsASnda3X1TAS2Y")
    UIApplication.shared.setStatusBarStyle(UIStatusBarStyle.lightContent, animated: true)


    UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor:UIColor.clear], for: .normal)
    UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor:UIColor.clear], for: .selected)




    print("Token is ", Messaging.messaging().fcmToken)


    Thread.sleep(forTimeInterval: 1.0)

    if #available(iOS 10, *) {
        UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate

        Messaging.messaging().delegate = self

        UNUserNotificationCenter.current().requestAuthorization(options: [.badge, .sound, .alert], completionHandler: { (granted, err) in
            //                application.registerForRemoteNotifications()
        })
    } else {
        let notificationSettings = UIUserNotificationSettings(types: [.badge, .alert, .sound], categories: nil)
        UIApplication.shared.registerUserNotificationSettings(notificationSettings)
        UIApplication.shared.registerForRemoteNotifications()
    }

    application.registerForRemoteNotifications()

    return true
}

问题是，当我尝试将FirebaseApp.configure() 放在application(didFinishLaunchingWithOptions) 的开头时，我得到了

线程 1：信号 SIGABRT 错误。

从控制台我得到：

由于未捕获的异常而终止应用程序 'NSInternalInconsistencyException'，原因：'默认的 FIRApp 必须先配置实例，然后才能使用默认的 FIRAuthinstance 初始化。确保这一点的一种方法是致电[FIRApp configure]; 在application:didFinishLaunchingWithOptions: 中调用。'

我无法理解原因。

Answer 1

首先，FirebaseApp.configure() 必须位于 didFinishLaunchingWithOptions

的第一行

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    FirebaseApp.configure()
    ...

.

在那之后，你做所有的注册事情。

    ...
    // Thread.sleep(forTimeInterval: 1.0) // why do you need a sleep here?
    if #available(iOS 10, *) {
        UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
        Messaging.messaging().delegate = self
        UNUserNotificationCenter.current().requestAuthorization(options: [.badge, .sound, .alert], completionHandler: { (granted, err) in
           application.registerForRemoteNotifications()
        })
    } else {
        let notificationSettings = UIUserNotificationSettings(types: [.badge, .alert, .sound], categories: nil)
        UIApplication.shared.registerUserNotificationSettings(notificationSettings)
        UIApplication.shared.registerForRemoteNotifications()
    }
    return true
}