在 iOS 10 下使用 FCM 在前台单击推送通知后无法导航到特定的 viewController

Question

我正在尝试在前台和后台获取通知，我在两种状态下都收到通知，但是当应用程序处于前台时点击通知后，我无法将其导航到所需的视图控制器，任何帮助将不胜感激，在此先感谢 我正在使用第三方自定义横幅，在 iphone 4s 设备、ios 9 上运行

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
 // If you are receiving a notification message while your app is in the background,
    // this callback will not be fired till the user taps on the notification launching the application.
    // TODO: Handle data of notification
    // With swizzling disabled you must let Messaging know about the message, for Analytics

    Messaging.messaging().appDidReceiveMessage(userInfo)
    print("In did Recieve Notification")
    // Print message ID.
    print("userInfoNotification=\(userInfo)")
    if let contactID = userInfo["contactID"] as? String {
        self.contactID = contactID
        print(contactID)
    }
    let state = UIApplication.shared.applicationState
    if state == .active {
        print("App in Foreground")

        if self.contactID != AppDelegate.openedChatContactId {
            print("openedID=\(AppDelegate.openedChatContactId)")
            if let aps = userInfo["aps"] as? NSDictionary {
                if let alert = aps["alert"] as? NSDictionary {
                    let body = alert["body"] as! String
                    let title = alert["title"] as! String
                    let banner = Banner(title: title, subtitle: body, image: UIImage(named: "AppIcon"), backgroundColor: UIColor(red:31.00/255.0, green:136.0/255.0, blue:254.5/255.0, alpha:1.000))
                    banner.dismissesOnTap = true
                    banner.show(duration: 3.0)

                      //  let storyboard = UIStoryboard(name: "Main", bundle: nil)
                     //   let viewController = storyboard.instantiateViewController(withIdentifier: "chatMessageVC") as! ChatMessagesVC
                     // UIApplication.shared.keyWindow?.rootViewController = viewController;
                } else if let alert = aps["alert"] as? NSString {
                }
            }
        }
    }

    if state == .inactive || state == .background {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        var destinationViewController = storyboard.instantiateViewController(withIdentifier: "chatMessageVC") as! ChatMessagesVC
        UserDefaults.standard.set(contactID, forKey: "contactID")
        UserDefaults.standard.synchronize()
        destinationViewController.contactID = self.contactID
        let navigationController = self.window?.rootViewController as! UINavigationController
        navigationController.pushViewController(destinationViewController, animated: false)

    }
}

Answer 1

在UIApplication的扩展下面实现

extension UIApplication {
    class func topViewController(controller: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
        if let navigationController = controller as? UINavigationController {
            return topViewController(controller: navigationController.visibleViewController)
        }
        if let tabController = controller as? UITabBarController {
            if let selected = tabController.selectedViewController {
                return topViewController(controller: selected)
            }
        }
        if let presented = controller?.presentedViewController {
            return topViewController(controller: presented)
        }
        return controller
    }
}

请更改您的代码以在应用处于前台时导航到特定屏幕。

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "chatMessageVC") as! ChatMessagesVC
UIApplication.topViewController()?.navigationController?.pushViewController(viewController, animated: false)

希望这对您有帮助，如有任何疑问，请告诉我。

更新

如果应用程序在前台中运行，iOS 将不会显示通知横幅/警报。这是设计使然。但是我们可以使用 UILocalNotification 来实现它，如下所示

if application.applicationState == .active {
    var localNotification = UILocalNotification()
    localNotification.userInfo = userInfo
    localNotification.soundName = UILocalNotificationDefaultSoundName
    localNotification.alertBody = message
    localNotification.fireDate = Date()
    UIApplication.shared.scheduleLocalNotification(localNotification)
}