Airdrop no longer working

Question

Deddiekoel OP

Created Aug ’19

Replies 3

Boosts 0

Views 1.5k

Participants 3

I have an app for which I can create a custom export which I can then transfer over Airdrop.

But my device running iSO 13.1 is no longer able to accept the incoming data. The device seems to receive the incoming transfer, it vibrates, but then won't open the app.

Also in a share-sheet (for a version of the export I sent over WhatsApp) my app is no longer shown.

Any idea on what I can do to fix this?

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Answer 1

Deddiekoel OP

Sep ’19

I fixed it, but not too happy about it, but this thread helped me:

https://stackoverflow.com/questions/9266079/why-is-my-ios-app-not-showing-up-in-other-apps-open-in-dialog

So what I did was add the following bit to my

CFBundleDocumentTypes:

    <dict> <key>CFBundleTypeName</key> <string>Unknown File</string> <key>LSHandlerRank</key> <string>Alternate</string> <key>LSItemContentTypes</key> <array> <string>public.calendar-event</string> <string>public.database</string> <string>public.executable</string> <string>public.data</string> <string>public.content </string> <string>public.item</string> </array> </dict>

So basically, my app can now open unknown files too and not the one specific file. It works, but I would have preferred if my app wouldn't show in places it shouldn't...

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Answer 2

Anaxyrus Americanus OP

Sep ’19

Your solution was a great help, as I faced the same problem. But in my case at least, I was able to find a more elegant fix. It appears that iOS 13 is much more picky about UTI conformance lists than previous iOSes were.

I have a custom UTTypeDescription, which declares conformance to these UTIs:

public.color-lookup-table

public.3d-color-lookup-table

That worked fine up through iOS 12; my app showed up in the share sheet for the appropriate file type (a .cube file). But in iOS 13, the app didn't appear. Adding the "Unknown File" bundle type made it appear, but for every file type, not just the ones I wanted.

Prowling through https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_declare/understand_utis_declare.html#//apple_ref/doc/uid/TP40001319-CH204-SW1

I saw this (emphasis added):

"Be sure to add conformance information if your proprietary type is a subtype of one or more existing types. In most cases you should not specify conformance to a nonpublic type, unless you are also declaring that type in your bundle. Although a custom UTI can conform to any UTI,

public.data

or

com.apple.package

must be at the root of the conformance hierarchy for all custom UTIs that are file formats (such as documents); otherwise, the system can’t tell if an item on disk has that UTI."

So I added public.plain-text to my list of UTIs, based on the hierarchy at: https://github.com/videovillage/LUTSpec/blob/master/LUTSPEC_UTI.md

public.plain-text

public.color-lookup-table

public.3d-color-lookup-table

That worked, but with the wrong icon; so I added public.data:

public.data

public.plain-text

public.color-lookup-table

public.3d-color-lookup-table

Now my app appears in the share sheets for .cube files, and only .cube files, and it has the right icon associated with it. (Well, on iOS 13. On an iOS 12 iPad, it shows the Numbers icon; on an iOS 12 iPhone SE it uses the Pages icon. But I've found that data-file icons on iOS tend to vary semi-randomly for no obvious reason, so I'm not as worried about this as I used to be!)

So make sure that your custom UTIs (if any) trace their conformance back to known Apple types, and you may be able to displence with the catch-all "unknown file" bundle type.

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Answer 3

AhsanMughal OP

Dec ’21

This post will teach you all you need to know about using AirDrop to solve any problem. In the given article we will show instructions about How to Fix Airdrop not Working on iPhone, iPad, and MacBook.

https://www.blowingideas.com/fix-airdrop-not-working-after-ios-15-update/

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