在 iOS 10 以下使用 FCM 单击前台的推送通知后，无法导航到特定视图控制器

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，提前感谢 我正在使用第三方自定义横幅，在iPhone 4s设备上运行，iOS 9

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

实现以下UIApplication扩展

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程序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)

希望这能找到你，如果有任何疑问，请告诉我。

更新

如果应用程序在前台运行，iOS 不会显示通知横幅/警报。这是设计使然。但是我们可以通过使用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)
}