159818353: Dynamic Links causes a warning banner to appear under iOS 14

[rhysforyou]

[REQUIRED] Step 1: Describe your environment

• Xcode version: Version 11.5 (11E608c)
• Firebase SDK version: 6.10.0
• Firebase Component: Dynamic Links
• Component version: 6.10.0
• Installation method: CocoaPods

[REQUIRED] Step 2: Describe the problem

When launching my app on a device running the iOS 14 or iPadOS 14 beta, when I've copied something on another device, I get this system generated banner:

This appears to be caused by Firebase Dynamic Links, which attempts to check for a dynamic link saved in the pasteboard by a previously visited landing page.

Not sure what the best solution here is, but we're definitely going to get complaints when users update to iOS 14, launch our app, and immediately see something that looks like us harvesting their data.

[google-oss-bot]

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[PycKamil]

There are new iOS 14 Pasteboard API available on, this should probably be used now to avoid getting this banner https://developer.apple.com/documentation/uikit/uipasteboard/detectionpattern/3618951-probableweburl?changes=latest_major

[ryanwilson]

Thanks for the report! And thanks @PycKamil for pointing out the new Pasteboard API. We'll look at getting this resolved quickly because you're right - that's not a good user experience at all.

[eldhosembabu]

May be we should be able to query the pasteboard with new api (https://developer.apple.com/documentation/uikit/uipasteboard/detectionpattern?changes=latest_minor) before trying to access it.

[ncooke3]

Hey everybody,

While we are still exploring potential solutions, we would appreciate feedback on a current approach we are exploring. Feel free to pull in the below version of 'Firebase/DynamicLinks' and let us know if this reduces the issue in your tests.

pod 'Firebase/DynamicLinks', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'nc-dl-ios14'

We'll keep this thread updated with future developments!

[rasod]

@ncooke3 Out of transparency could we have some questions officially answered regarding this feature.

1. When does the SDK currently (production version) access the Pasteboard to check for a DL? Every foreground? On Interval? First Launch Only? Other Events.
2. Is the contents of the pasteboard sent off device for any reason? If so why?
3. If the SDK didn’t access the pasteboard at all what features of DL would stop working? It makes sense that the pasteboard is used to complete the journey when the user goes from the landing page of a DL to the App Store then to first run. What other features of DL are enabled by the pasteboard?

Thanks

[paulb777]

Internally tracked at b/159818353