[FIRA_AppDelegate- messaging:didRefreshRegistrationToken:]: unrecognized selector sent to instance - firebase crash issue

Question

I found a new issue when I reinstalled the iOS app. Before reinstalling the app worked fine. Before reinstalling I updated cocoa sdk repo and it updated Firebase and FirebaseDatabase version from 3.15.0 to version 4.0.0.

Here is the crash log below:

-[FIRA_AppDelegate-1495465837867 messaging:didRefreshRegistrationToken:]: unrecognized selector sent to instance 0x174661b40 2017-05-22 23:10:58.550969+0800 moodfriends[1716:245390] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[FIRA_AppDelegate-1495465837867 messaging:didRefreshRegistrationToken:]: unrecognized selector sent to instance 0x174661b40'

Answer 1

Just found the solution.

Changed

[FIRMessaging messaging].remoteMessageDelegate = self;

to

[FIRMessaging messaging].delegate = self;

It seems remoteMessageDelegate is deprecated with the version update and should FIRMessagingDelegate delegate functions.

Swift 3:

Messaging.messaging().delegate = self

Answer 2

the crash occurred because either the class has no declaration of method messaging:didRefreshRegistrationToken:

or you didn't have set delegate for Firebase Message