当点击 FCM 推送通知时，如何在选项卡栏中打开特定的视图控制器? [英] How do I open a particular view controller in a tab bar when a FCM push notification is tapped?

问题描述

每当我在关闭应用程序时点击推送通知时，应用程序都会崩溃.如果它在后台或在我点击推送通知时打开，那么它加载得很好.

The app keeps crashing whenever I tap the push notification when the app is closed. If it's in the background or open when I tap the push notification then it loads just fine.

我已经尝试过这里的建议:Swift - 如何在收到推送通知时打开特定的视图控制器?

I've tried the suggestions over here: Swift - How to open specific view controller when push notification received?

以下是应用委托中的相关功能.没有注册任何用于确定导致崩溃的确切位置的打印功能，因此我无法正确调试.我看到的唯一消息是:

Below are the relevant functions in the app delegate. Any print functions to determine where exactly the crash is caused is not being registered so I cannot debug properly. The only message I see is:

来自调试器的消息:由于信号 9 终止

Message from debugger: Terminated due to signal 9

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        // Navigation customization
        UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor(hex: Constants.Colors.primary)!, NSAttributedString.Key.font: UIFont(name: "NexaLight", size: 18)!], for: UIControl.State.normal)
        
        UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor(hex: Constants.Colors.primary)!, NSAttributedString.Key.font : UIFont(name: "NexaBold", size: 18)! ], for: .highlighted)
        
        UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor(hex: Constants.Colors.secondary)!, NSAttributedString.Key.font : UIFont(name: "NexaBold", size: 18)! ], for: .focused)
        
        ApplicationDelegate.shared.application( application, didFinishLaunchingWithOptions: launchOptions )
        
        if #available(iOS 10.0, *) {
          // For iOS 10 display notification (sent via APNS)
          UNUserNotificationCenter.current().delegate = self
        }
        
        // Firebase
        FirebaseApp.configure()
        
        // APN FCM
        Messaging.messaging().delegate = self
        
        // Stripe
        StripeAPI.defaultPublishableKey = "test"
        
        // Google sign-in
        GIDSignIn.sharedInstance()?.clientID = "test"

        return true
    }

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


    if let window = (UIApplication.shared.connectedScenes.first?.delegate as? SceneDelegate)?.window {
        guard let rootViewController = (UIApplication.shared.connectedScenes.first?.delegate as? SceneDelegate)?.window?.rootViewController else { return }
        if let tabBarController = rootViewController as? MainTabBarController {
            tabBarController.selectedIndex = 1
            window.rootViewController = tabBarController
            window.makeKeyAndVisible()
        } 
    }

completionHandler()
}

推荐答案

这是我解释的代码

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

    if let window = (UIApplication.shared.connectedScenes.first?.delegate as? SceneDelegate)?.window {
        if let rootViewController = (UIApplication.shared.connectedScenes.first?.delegate as? SceneDelegate)?.window?.rootViewController {
            if let tabBarController = rootViewController as? MainTabBarController {
                tabBarController.selectedIndex = 1
                window.rootViewController = tabBarController
                window.makeKeyAndVisible()
            }
        } else {
            let tabBarController = UIStoryboard(name: "main", bundle: .main).instantiateViewController(identifier: "MainTabBarController") as? MainTabBarController
            tabBarController.selectedIndex = 1
            window.rootViewController = tabBarController
            window.makeKeyAndVisible()
        }
    }
    completionHandler()
}

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