[Question] iOS Dynamic Linking not working with Messaging - Issue with our setup?

[HarrisonShort]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2021.2.14f1
• Firebase Unity SDK version: 8.8.0
• Source you installed the SDK: .unitypackage
• Problematic Firebase Component: Messaging, Dynamic Links
• Other Firebase Components in use: Analytics, Auth, Storage
• Additional SDKs you are using: Facebook, (Facebook, AdMob, etc.)
• Platform you are using the Unity editor on: Windows, Mac
• Platform you are targeting: iOS
• Scripting Runtime: IL2CPP

[REQUIRED] Please describe the question here:

We are in the process of implementing Dynamic Links and our app is heavily dependent on notifications via Firebase Messaging. We are finding an issue in our set up where depending on the status of the boolean FirebaseAppDelegateProxyEnabled in the Info.plist file, Firebase Messaging and Dynamic Links are fully functional somewhat mutually exclusive of each other.

If FirebaseAppDelegateProxyEnabled is set to true/1:

• Notifications can be received as per usual.
• Dynamic Links will not open the app, but instead just open the App Store to our app's store page.

If FirebaseAppDelegateProxyEnabled is set to false/0:

• Notifications are not received. I believe this is correct functionality, as this page states not to disable method swizzling when using Firebase Unity SDK on iOS, as it causes issues with FCM token handling.
• Dynamic Links open the app and trigger functionality as expected. We initially tested this out due to finding this StackOverflow question, which made the change in a post-build process.

Other things we have done:

• Added FirebaseDynamicLinksCustomDomains array to our Info.plist, with our URL as an element of this array.
• Added Associated Domains capability in Xcode, with "applinks:" as an element (Dynamic Links were working before this change, as long as FirebaseAppDelegateProxyEnabled was set to false).
• Checked the apple-app-site-association page, which correctly lists our Team ID and Bundle ID.

It is likely that we have done something incorrectly in our set up, but we are just wondering what it could be. Hope someone will have some idea of where we've gone wrong! Thank you in advance. (:

[paulinon]

Hi @HarrisonShort,

Thanks for reporting this issue. Could you provide a minimal, reproducible example of your implementation along with the complete steps to replicate the issue so that we can identify what's causing this behavior?

[google-oss-bot]

Hey @HarrisonShort. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[HarrisonShort]

Hi @HarrisonShort,

Thanks for reporting this issue. Could you provide a minimal, reproducible example of your implementation along with the complete steps to replicate the issue so that we can identify what's causing this behavior?

Thanks for your reply @paulinon.
Interestingly, I was trying to recreate this using the Firebase Quickstart projects, and it worked fine, whether I had included FirebaseAppDelegateProxyEnabled in the Info.plist, or not. So I'm going to have to do some further testing with our actual app project, to see if its actually something else that's causing the behaviour.

[HarrisonShort]

Have just confirmed that the initial issue is not appearing. I believe it was actually something to do with our set up, perhaps related to adding the Keychain Sharing capabilities that were outlined in the Dynamic Links Quickstart guide. I don't think we had that before.

Thanks for your attention! (:

EDIT: Actually, I am finding an issue where Dynamic Links do not open the app in the case that the capabilities are automatically added to the project via post-build methods. Would this be suited for opening another issue?