Dfyjkt

Just upgrade AWSMobileClient from 2.6.8 to 2.7.0 and see the following line of warning message:

'interceptApplication(_:didFinishLaunchingWithOptions:)' is deprecated: This method will be removed in the next minor version. Please update to use AWSMobileClient using initialize. Please visit https://aws-amplify.github.io for the latest iOS documentation.

func application(_ application: UIApplication,
 didFinishLaunchingWithOptions launchOptions:
 [UIApplication.LaunchOptionsKey: Any]?) -> Bool 
 return AWSMobileClient.sharedInstance().interceptApplication(
 application, didFinishLaunchingWithOptions:
 launchOptions)

It is not obvious to me what we should change interceptApplication to. There is indeed a initialize function. Should we just put that in application(didFinishLaunchingWithOptions: ) and return true always?

func application(_ application: UIApplication,
 didFinishLaunchingWithOptions launchOptions:
 [UIApplication.LaunchOptionsKey: Any]?) -> Bool 

 AWSMobileClient.sharedInstance().initialize (userState, error) in
 // ...
 

 return true

I too have have experienced the same issue this week. In the latest documentation, specifically the initialization section you will see it says:

Open the AppDelegate of your Xcode project, or optionally in your View Controller viewDidLoad() and invoke the initialize routine

So what I did is go to AppDelegate and replace:

return AWSMobileClient.sharedInstance().interceptApplication(application, didFinishLaunchingWithOptions: launchOptions)

With:

return true

Then in viewDidLoad in your main UIViewController call the initialization routine as per the docs:

import AWSMobileClient

override func viewDidLoad() 
 super.viewDidLoad()

 AWSMobileClient.sharedInstance().initialize (userState, error) in
 if let userState = userState 
 print("UserState: (userState.rawValue)")
 else if let error = error 
 print("error: (error.localizedDescription)")
 
 

You will then be able to use the new user state listener for your app's auth logic:

AWSMobileClient.sharedInstance().addUserStateListener(self) (userState, info) in
 switch (userState) 
 case .guest:
 print("user is in guest mode.")
 case .signedOut:
 print("user signed out")
 case .signedIn:
 print("user is signed in.")
 case .signedOutUserPoolsTokenInvalid:
 print("need to login again.")
 case .signedOutFederatedTokensInvalid:
 print("user logged in via federation, but currently needs new tokens")
 default:
 print("unsupported")
 

And you can now also use getTokens:

AWSMobileClient.sharedInstance().getTokens (tokens, error) in
 if let error = error 
 print("Error getting token (error.localizedDescription)")
 
 else if let tokens = tokens 
 print("id token: (tokens.idToken!.tokenString!)")
 print("access token: (tokens.accessToken!.tokenString!)")
 

Hopefully that helps!