Why ambiguous reference to member 'Subscript'?

Question

This is my Swift 3 code:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    if let userInfo : Foundation.NSDictionary = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? Foundation.NSDictionary {
        self.setNavigationInfoFromPushNotification(userInfo: userInfo)
        navigateFromPushNotification()
    }
    ...
}

It results in a compile-time error that says:

Ambiguous reference to member 'Subscript'

Please can anyone help me with this?

Can you please also include your current method signature for `didFinishLaunchingWithOptions` ? — Keiwan, Dec 26 '16 at 10:03
@Rob Or it might be this: http://stackoverflow.com/questions/40209234/how-to-handle-launch-options-in-swift-3-when-a-notification-is-tapped-getting-s — Keiwan, Dec 26 '16 at 10:04
`launchOptions` seems to be `Any?` and must be casted to a dictionary. And in Swift do not annotate types the compiler can infer and do not use `NSDictionary` unless you have no choice (here you have). — vadian, Dec 26 '16 at 10:14
Yes, correct. I changed the syntax for didFinishLaunchingWithOptions method. It is working well. Thankyou !! — Megha, Dec 26 '16 at 10:20
From func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool — Megha, Dec 26 '16 at 10:21
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool { — Megha, Dec 26 '16 at 10:23
@Keiwan - Yep, you're right. This turned out to be a duplicate of http://stackoverflow.com/questions/40209234/how-to-handle-launch-options-in-swift-3-when-a-notification-is-tapped-getting-s. — Rob, Dec 26 '16 at 18:50

score 1 · Accepted Answer · edited May 23 '17 at 12:00

The method signature has changed. See How to handle launch options in Swift 3 when a notification is tapped? Getting syntax problems.

It is now:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool { 
    if let userInfo = launchOptions?[.remoteNotification] as? NSDictionary {
        setNavigationInfoFromPushNotification(userInfo: userInfo)
        navigateFromPushNotification()
    }
    ...
}

Why ambiguous reference to member 'Subscript'?

1 Answers1