How to handle launch options in Swift 3 when a notification is tapped? Getting syntax problems

Question

I am trying to handle the launch option and open a specific view controller upon tapping a remote notification that I receive in swift 3. I have seen similar question, for instance here, but nothing for the new swift 3 implementation. I saw a similar question (and ) In AppDelegate.swift I have the following in didFinishLaunchingWithOptions:

    var localNotif = (launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as! String)
if localNotif {
    var itemName = (localNotif.userInfo!["aps"] as! String)
    print("Custom: \(itemName)")
}
else {
    print("//////////////////////////")
}

but Xcode is giving me this error:

Type '[NSObject: AnyObject]?' has no subscript members

I also tried this:

   if let launchOptions = launchOptions {
        var notificationPayload: NSDictionary = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as NSDictionary!

    }

and I get this error:

error: ambiguous reference to member 'subscript'

I got similar errors wherever I had previously used similar code to get a value from a dictionary by the key and I had to replace the codes and basically safely unwrap the dictionary first. But that doesn't seem to work here. Any help would be appreciated. Thanks.

score 34 · Answer 1 · edited Sep 11 '20 at 15:17

34

Apple made plenty of changes in Swift 3 and this one of them.

Edit: This works for Swift 4 as well.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    //Launched from push notification
    let remoteNotif = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? [String: Any]
    if remoteNotif != nil {
        let aps = remoteNotif!["aps"] as? [String:AnyObject]
        NSLog("\n Custom: \(String(describing: aps))")
    }
    else {
        NSLog("//////////////////////////Normal launch")
    }
}

Swift 5:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    //Launched from push notification
    guard let options = launchOptions,
        let remoteNotif = options[UIApplication.LaunchOptionsKey.remoteNotification] as? [String: Any]
        else {
            return
    }
    let aps = remoteNotif["aps"] as? [String: Any]
    NSLog("\n Custom: \(String(describing: aps))")
    
    handleRemoteNotification(remoteNotif)
}

And for more on LaunchOptionsKey read Apple's documentation.

edited Sep 11 '20 at 15:17

kwl

495
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answered Oct 24 '16 at 01:00

Adeel Miraj

2,472
3
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32

I still get the error , ambiguous reference to member subscript! – TheBen Oct 24 '16 at 01:21
my bad, there was a mistake. try now – Adeel Miraj Oct 24 '16 at 01:23
Hmm, thanks but you sure you updated your response? seems to be the same – TheBen Oct 24 '16 at 01:26
1

Yes I have made a couple of changes. They are very minor that's why they aren't evident. – Adeel Miraj Oct 24 '16 at 01:28
So as I mentioned in the answer above it turned out the whole signature of didfinishwithoptions method has changed. Thanks for your comments again. – TheBen Oct 24 '16 at 03:40
Tried the Swift 5 solution but I am not getting value for the "remoteNotif". Any reason why this is happening. Except when app is killed in all other scenarios I am getting push notifications. – subin272 Jun 03 '20 at 17:53
@subin272 this code is for the case when app is killed and is launched through a notification. Can you share any further details to investigate the issue? – Adeel Miraj Jun 03 '20 at 20:47
@Adeel yes I am trying the same scenario you mentioned ie the app is killed. Then trying to launch it from push notification. I am checking it with an if else condition. – subin272 Jun 04 '20 at 03:33
@Adeel. if let options = launchOptions, let remoteNotif = options[UIApplication.LaunchOptionsKey.remoteNotification] as? [String: Any] { UserDefaults.standard.set("From remote", forKey: "NotificationPayload") } else { UserDefaults.standard.set("xyz", forKey: "NotificationPayload") } – subin272 Jun 04 '20 at 03:35
Is there any other way to verify the contents of "launchOptions" or test remote notifications when the app is killed? – subin272 Jun 04 '20 at 03:36
@subin272 its a strange behaviour. Can't really say why it might be happening. – Adeel Miraj Jun 04 '20 at 09:43
@Adeel Found a solution for this..seems its an iOS 13 issue. Link to the solution - https://stackoverflow.com/questions/60007715/launchoptions-always-nil-when-launching-from-a-push-notification – subin272 Jun 05 '20 at 07:26

TheBen · Accepted Answer · 2016-10-24T03:38:59.953

So it turned out the whole method signature has changed and when I implemented the new signature things worked just fine. Below is the code.

new didFinishLaunchingWithOptions method:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {



//and then 
 if launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] != nil {


// Do what you want to happen when a remote notification is tapped.


}

}

Hope this helps.

score 7 · Answer 3 · edited Jun 20 '20 at 09:12

7

Swift 4

// Check if launched from the remote notification and application is close
 if let remoteNotification = launchOptions?[.remoteNotification] as?  [AnyHashable : Any] {
            // Do what you want to happen when a remote notification is tapped.
            let aps = remoteNotification["aps" as String] as? [String:AnyObject]
            let apsString =  String(describing: aps)
            debugPrint("\n last incoming aps: \(apsString)")
    }

edited Jun 20 '20 at 09:12

Community

1
1

answered Mar 13 '18 at 12:44

Amr Angry

3,711
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37

1

How to pass this notification object in `didReceiveRemoteNotification` function ? – Vinoth Vino Dec 18 '18 at 12:32
sorry i didn't get what you mean, can you elaborate more so i can help you. – Amr Angry Dec 19 '18 at 18:53

score 0 · Answer 4 · answered May 30 '17 at 13:29

0

swift 3:

        if let notification = launchOptions?[.localNotification] as? NSDictionary{

            #if DEBUG
                print("iOS9 didFinishLaunchingWithOptions notification\n \(notification)")
            #endif

answered May 30 '17 at 13:29

ingconti

10,876
3
61
48

score 0 · Answer 5 · answered Jan 20 '18 at 00:15

0

if let remoteNotif = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? [String: Any] {
       if let notification = remoteNotif["aps"] as? [AnyHashable : Any] {
               //handle PN
       }
}

answered Jan 20 '18 at 00:15

Svitlana

2,938
1
29
38

How to handle launch options in Swift 3 when a notification is tapped? Getting syntax problems

5 Answers5

Swift 4

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