Open files created in iOS Documents folder

Question

Created Jan ’21

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My application is writing a .plist config file to Documents folder (in Library/CoreSimulator/Devices/<ID>/data/Container/Data/Application/<ID>

The file then didn't show when using UIDocumentPickerViewController :

UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.text"] inMode:UIDocumentPickerModeOpen];
documentPicker.delegate = self;
documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentViewController:documentPicker animated:YES completion:nil];

I also tested using "com.apple.property-list" as documents types filter (and UIDocumentPickerModeImport)

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Answer 1

OOPer OP

Jan ’21

Accepted Answer

As far as I tried, UIDocumentPickerViewController shows the file saved in the Documents directory.
(For plist files, "com.apple.property-list" seems to be the right type specifier.)

Have you set Info.plist of your app properly?
You need to set both UIFileSharingEnabled and LSSupportsOpeningDocumentsInPlace to YES.

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Answer 2

cjed OP

Jan ’21

It finally worked since the previously created file was put on a new iCloud folder (however I don't See the local Documents folder and couldn't access to the applications's file (clicking "On my iPad" did nothing).

Now, after having added the two properties you suggested I can browse "On my ipad", and see application's name content (generated files).

There is a new non-blocking error :

DocumentManager] Failed to associate thumbnails for picked URL file:///Users/.../Library/Developer/CoreSimulator/Devices/.../data/Containers/Data/Application/.../Documents/perf.plist with the Inbox copy file:///Users/.../Library/Developer/CoreSimulator/Devices/.../data/Containers/Data/Application/.../tmp/com.Player-Inbox/perf.plist: Error Domain=QLThumbnail Code=2 "(null)" UserInfo={NSUnderlyingError=0x600003dad7d0 {Error Domain=GSLibraryErrorDomain Code=3 "Generation not found" UserInfo={NSDescription=Generation not found}}

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Answer 3

OOPer OP

Jan ’21

There is a new non-blocking error :

DocumentManager] Failed to associate thumbnails for picked URL
...

Some articles on the web say, that you can safely ignore it.
If you find something non-ignorable with this message, you should better start a new thread.

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