iOS Dynamic link from custom scheme url is always nil (i.e. "<my-scheme-name>://google/link/?is_weak_match=1")

[Emory Al-Imam]

I read up on all the posts I could find on SO and GG and am still getting a nil url when launching the app for the first time after tapping a dynamic link pasted into the Notes app on iOS.

Universal Links work fine and as expected through application(_:continue:restorationHandler:). When coming through application(_:open:options:) (formerly application:openURL:options:) however, the url comes in as <my-scheme-name>://google/link/?is_weak_match=1. No matter how I configure my project/app, the url is always nil. Also, application(_:open:options:) is called on every first launch of the app regardless of whether a dynamic link was tapped before the app was installed or not. Is that to be expected?

Deep link example: 

• https://u2j7d.app.goo.gl/?ibi=<my-bundle-id>&ius=<my-bundle-id>&isi=1261514996&imv=1.0.0&link=https://mydomain.com/?uid=IZFvLig3AVOV2Dupn0a4WAyT9b52

My project configuration and set up below…

Configuration:

• apple-app-site-association file is set up and looks good for Universal Links.
  
• Custom URL scheme set up in Info.plist.
• Using latest GoogleService-Info.plist
• Not in Safari 'Private' Mode
• Calling FirebaseOptions.defaultOptions()?.deepLinkURLScheme = "<my-scheme-name>" before FirebaseApp.configure().

Setup:

• Xcode 9, Beta 5
  
• Deployment target: iOS 10.3.1 and higher
• Swift 4
  
• Firebase (4.0.4)
  
• FirebaseAnalytics (4.0.2)
  
• FirebaseAuth (4.0.0)
  
• FirebaseCore (4.0.4)
  
• FirebaseDatabase (4.0.0)
  
• FirebaseDynamicLinks (2.0.0)
  
• FirebaseInstanceID (2.0.0)

Thanks for you help.

[mathew....@trov.com]

We are having a similar problem. We can successfully pass the Dynamic Link to our app and parse it, however when we open the app in Simulator via Xcode, we get that <my-scheme-name>://google/link/?is_weak_match=1 issue, and we're not quite sure how to fix it. We have added some error handling to bypass this for now, but in the event that a Dynamic Link is genuinely unparseable for whatever reason, we need to handle that situation accordingly. Right now we can't do that without showing an alert to every user running in simulator.

[Ian Barber]

This one is a bit mysterious, particularly the fact that its happening on app start. Do you have custom URL schemes set up for both your scheme and your bundle ID?

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[Velmurugan Subramaniam]

Yes for me also facing this problem for last 1 months. its works before well, but No i am unable to get link when app is not installed. i getting only "project://google/link/?dismiss=1&is_weak_match=1"

Can you pls guide me how to solve this issue ?

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