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iOS11 UIDocumentPickerViewController does nothing after selecting an attachement

We're currenty testing an app for iOS11 support and bumped into a problem with the new UIDocumentPickerViewController. An action opens the new UIDocumentPickerViewController, iCloud Drive is shown by default, we're tapping on the Locations button and switch to Dropbox. When selecting an attachement, the viewcontroller is dismisses but nothing is happening. When selecting an attacthement from iCloud Drive things work just fine.

While debugging we found out the delegate method is not called and following message is shown in the console output.

[UIDocumentLog] UIDocumentPickerViewController : didPickDocumentURLs called with nil or 0 URLS

Does someone else has this problem too? If yes, what's your solution. It would be nice to see this fixed before iOS11 is released.

Thanks in advance.

Kind regards

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Accepted answers

Maple

Hi jelteliekens,

This will be fixed/implemented once iOS 11 is official released.

All comments

Maple

Hi jelteliekens,

This will be fixed/implemented once iOS 11 is official released.

DaveZ

Hi Maple

Can you please fix this before the official iOS 11 release? There is an iOS 11 GM seed available already.

This is a pretty scary bug as a lot of the users of my app (20k+) rely on import from Dropbox via the UIDocumentPickerViewController and this will stop working as soon as they upgrade. I've already got a few complaints from the people on iOS 11 beta.

Kind regards

David

Maple

Hi DaveZ,

We are targeting the official iOS 11 release on the 19th so it won't be available before then. Sorry about the inconvenience. I recommend not upgrading until the iOS 11 release is official.

DaveZ

Thanks for the update.

JaceLightning

iOS 11 was officially released on September 12th and this is still broken

Jurgis K.

Maybe you can share with your collegues that this decision (postpone fix for aforementioned problem until official release date) really hurts developers as number our ordinary users enroll for public betas long before official iOS11 release.

Maple

Hi DaveZ, JaceLightning and Jurgis K.,

Thank you for writing in. I understand the frustration when using the iOS 11 beta with our app. I will pass your messages to our team.

The iOS 11 official release is expected on Sept 19 (tomorrow). The next version of Dropbox iOS will contain Files app support so be on the lookout for a new update in the next few days.

domhof

Hi Maple,

I'm sorry this might be a bit off-topic: Have you found a fix for this in your UIDocumentPickerExtensionViewController? I'm updating an app which has a working UIDocumentPickerExtensionViewController for iOS 10 but in iOS 11 I get the exact same error message in the client-app's console.

[UIDocumentLog] UIDocumentPickerViewController : didPickDocumentURLs called with nil or 0 URLS

Thank you!!

Maple

Hi domhof,

I didn't work on this feature so I asked the people who did for you. They said Apple 'broke' doc picker in iOS 11 (or maybe it is deprecated/no longer supported), and it will not work unless you implement file provider. We have not released our file provider extension yet so that's why users see this issue.

As an update, the release with our file provider is still in review. Sorry for the delay. We really want this out too!

nick63

Is this why I can’t add attachments to emails on my phone and iPad now? Did Apple do this so

I have to quit Dropbox?

Do you have an estimated time (hopefully in hours,because I am out of business till this works again) when the fix comes?

thanks!

herebcs

Apple did not broke the app picker as all other services/providers work perfectly on iOS 11 except Dropbox. Dropbox's implementation of the UIDocumentPickerViewController and

UIDocumentBrowserViewController are broken. They call documentPickerWasCancelled when the user selects a document.

The same error occured on an earlier version of Dropbox in March and that was fixed after a few releases. Looks like a regression issue to me...

Finally, just try compiling the document based app template in XCode 9. Apple's own code will not work with Dropbox.

Csaba

Maple

Hi Csaba,

I may have mis-worded my question to our files team. I'll let them reply as I don't know enough about the issue.

Hi nick63,

I don't have a timeline for when our release will be approved, but I'm estimating in the next day or two.

Fabiob65

J have the same problem with mail on ios11. J cannot attach file from dropbox.

Maple

Hi all,

64.3 is out in the app store. Please upgrade to it and try again.

nick63

Hi,

I just checked the Apple Store. No updates.

I am in SEA, and use the Australian Store.

Please advise.

DaveZ

Hi Maple

Just downloaded the update (I'm based in Ireland), everything works as expected, import fixed.

Thank you!

David

Maple

Hi nick63,

The update propagating to other app stores may take a while but shouldn't be more than a few hours.

SvenT

Hello,

Grateful for this thread here.

Thanks for the new update today. I had noticed Dropbox export/import stopped working with iOS 11 using UIDocumentPickerController, due to the “0 urls” issue. With 64.3 it works again.

Had to reinstall the Dropbox app though, just updating it wasn’t enough.

Best,

Sven

CC_JF

Hey folks! iOS engineer @ Dropbox here.

Please do update to the 64.3 version that is in the AppStore -- it has the full iOS 11 experience and should alleviate the issues you're seeing. If you have trouble seeing your files, make sure you launch the main Dropbox app once and ensure you're logged in, and you should see your Dropbox in Files. If not, try force killing and relaunching Files. We're pretty certain this is rare edge-case and will continue to make this better in future releases!

To @domhof:

I'm sorry this might be a bit off-topic: Have you found a fix for this in your UIDocumentPickerExtensionViewController? I'm updating an app which has a working UIDocumentPickerExtensionViewController for iOS 10 but in iOS 11 I get the exact same error message in the client-app's console.

There is an issue in iOS 11.0 that is caused by an mismatch in the Document Picker's Info.plist. If you do not have a File Provider Extension, ensure that you only support the Import and ExportToService types, as reporting Open or Move without an associated File Provider Extension will cause your extension to behave incorrectly. It's possible that this will be fixed in a future iOS update -- but consider just removing those keys if you have them. Hope this helps!

Thanks,

Jeff

JustinJ

I downloaded the update this evening. While it did fix the picker issue I had to turn off my passcode for my Dropbox app. When trying to open my DP folder in Files app, there is a message to authenticate by opening the DB app to do so. Turns out the passcode has to be disabled. This is pretty ridiculous. To use Files one has to disable protection for the DB app.

Consider this: to register for this forum one must sign in the enter a 6 digit code. Seems logical but extreme given now that one has to disable protection for the DB app to use Files. Makes no sense.

JustinJ

Sorry, neglected to attach the screenshot from Files app.

kymatica

@CC_JF

I had the same problem (I'm the developer of AudioShare), however I already had only Import and ExportToService types in my Document Picker's Info.plist.

Instead I had to implement a new File Provider extension, and this kind of works now. The user can interact with all my documents as expected in the Files app. However, I still get the same behavior when trying to import into an app! (no URLs passed, doc picker cancelled). Any special magic you had to do? Please let me know! (mail me at info kymatica com if this is too off topic here)

domhof

@Maple @CC_JF @kymatica

Thanks for your help! I can confirm that in iOS 11 UIDocumentPickerExtensionViewController only works when a NSFileProviderExtension is present (at least I didn't find any other way, even with only UIDocumentPickerModeImport).

Moreover the Files app seems to ignore my UIDocumentPickerModes setting in the UIDocumentPickerExtensionViewController's Info.plist! Even if I remove the setting completly, the Files app still shows my UIDocumentPickerExtensionViewController. While at the same time, e.g. in Whatsapp the UIDocumentPickerExtensionViewController, correctly, doesn't show up anymore. The Files app then opens it in UIDocumentPickerModeOpen mode. I can even load and edit (!) the files (photos).

I need to find a way to keep the Files app from opening my UIDocumentPickerExtensionViewController in open-mode despite the mode being not supported. The files may not be edited. Alternatively the edited version should be stored as a new file.

I think this might even be the root cause of the problem. That the Files App always opens the UIDocumentPickerExtensionViewController in open-mode and therefore a FileProvider is needed, even the Info.plist states only import as supported mode.

@kymatica I'll write you via mail. I guess this now goes into too much detail for this forum.

Maple

Hi JustinJ,

Please see this thread about passcode incompatibility: https://www.dropboxforum.com/t5/Mobile/ios-11-files-not-open/m-p/243316#M239

The team is investigating a solution for this.

domhof

@Maple @CC_JF @kymatica

@kymatica I'll write you via mail. I guess this now goes into too much detail for this forum.

kymatica

@domhof wrote:
@Maple @CC_JF @kymatica

@kymatica I'll write you via mail. I guess this now goes into too much detail for this forum.

Please do! I see the same thing, Files app always opens the doc picker in Open mode, despite the settings in Info.plist.