iOS Google Sign In error

Question

I'm trying to implement a google sign in button, when I add the following lines to my AppDelegate.swift file, I get this error:

Cannot subscript a value of type '[String : AnyObject]' with an index of type 'String'

Any ideas what's wrong with this code? By the way, this code is just copied and pasted from google page at: https://developers.google.com/identity/sign-in/ios/sign-in?configured&ver=swift

func application(application: UIApplication,
    openURL url: NSURL, options options: [String: AnyObject]) -> Bool {
        return GIDSignIn.sharedInstance().handleURL(url,
            sourceApplication: options[UIApplicationOpenURLOptionsSourceApplicationKey],
            annotation: options[UIApplicationOpenURLOptionsAnnotationKey])
}

Thanks

Answer 1

handleURL is looking for arguments of type "String" for sourceApplication and annotation, but options is providing "AnyObject." Casting those dictionary values to "String" oughtta do it.

Try this:

Update: Swift 3

func application(_ application: UIApplication,
                 open url: URL, options: [UIApplicationOpenURLOptionsKey: Any]) -> Bool
   return GIDSignIn.sharedInstance().handle(url,
       sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String,
       annotation: options[UIApplicationOpenURLOptionsKey.annotation] as? String)
}

Swift 2

func application(application: UIApplication,
    openURL url: NSURL, options: [String: AnyObject]) -> Bool {
        return GIDSignIn.sharedInstance().handleURL(url,
            sourceApplication: options[UIApplicationOpenURLOptionsSourceApplicationKey] as? String,
            annotation: options[UIApplicationOpenURLOptionsAnnotationKey] as? String)
}

This took me forever, too. Hope that helps!

Answer 2

Xcode 8 Swift 3

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
  return GIDSignIn.sharedInstance().handle(
  url,
  sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String,
  annotation: options[UIApplicationOpenURLOptionsKey.annotation])
}