使用FBSDKApplicationDelegate时对成员“下标”的引用不明确

Question

I have updated swift 3 and I found many errors. This is one of them :

Ambiguous reference to member 'subscript'

For the following line

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any]) -> Bool {
        FBSDKApplicationDelegate.sharedInstance().application(app, open: url, sourceApplication: options["UIApplicationOpenURLOptionsSourceApplicationKey"] as? String, annotation: options["UIApplicationOpenURLOptionsAnnotationKey"] as? String)

        return true
    }

I am not sure why I am getting this, does anyone else know ?

It works well in previous version 7.3.1 swift 2.

Answer 1

The type of the options dictionary has changed from [String: AnyObject] to [UIApplicationOpenURLOptionsKey : Any] this means you should subscript with UIApplicationOpenURLOptionsKey instead of a String like you're doing now.

Try this:

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    guard let sourceApplication = options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String,
        let annotation = options[UIApplicationOpenURLOptionsKey.annotation] else {
            return false
    }

    return FBSDKApplicationDelegate.sharedInstance().application(app, open: url,
                                                                 sourceApplication: sourceApplication,
                                                                 annotation: annotation)

}

This code extracts the keys you're looking for from the options and passes them to the FBSDKApplicationDelegate . Note the usage of UIApplicationOpenURLOptionsKey.sourceApplication and UIApplicationOpenURLOptionsKey.annotation to access values in the options dictionary.

Answer 2

This is how deal with with versions before and after iOS 9 with swift 3 and Xcode 8

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {


    return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}

@available(iOS 9.0, *)
func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {


    return FBSDKApplicationDelegate.sharedInstance().application(app, open: url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String, annotation: options[UIApplicationOpenURLOptionsKey.annotation])

}

Hope it helps!