startAccessingSecurityScopedResource() returns false even when access to a file is allowed

I have an iOS app which has an action extension to save documents in it.

The method startAccessingSecurityScopedResource() returns false in some cases even when I am able to access the file.

BOOL success = [originalURL startAccessingSecurityScopedResource];    
if (success) {
    NSFileCoordinator *fileCoordinator = [[NSFileCoordinator alloc] init];
    NSError *error = nil;
    [fileCoordinator coordinateReadingItemAtURL:originalURL options:NSFileCoordinatorReadingForUploading error:&error byAccessor:^(NSURL *newURL) { 
        //My Code
    }
}

In the above code, the following is observed

When sharing a file from Apple’s Photos App

originalURL = file:///var/mobile/Media/PhotoData/OutgoingTemp/49152B46-E719-41A5-A5D5-21EAE6254246/RenderedPhoto/IMG_0026.JPG 

When sharing a file from MS Word App

originalURL = file:///private/var/mobile/Containers/Data/Application/1B0C962F-E7B4-46ED-A9DA-A8213E05A470/tmp/ShareAttachments/%7BC699DC26-37F9-A949-8F69-1F9D6981C4B0%7D/Document.docx

When sharing a file from Apple’s Pages App

originalURL = file:///private/var/mobile/Containers/Data/Application/CDBBDC79-02C7-4ABF-A6B9-F38B6540E2B1/Documents/Document%20(1).pages

The flag success is true in the first case (Photos App), but is false in the other two (Word & Pages App).

If I remove the success flag check, I am able to access all the three files using the NSFileCoordinator and am able to copy the file into my app.

Therefore, I am not sure why is the method startAccessingSecurityScopedResource() returning false for a scenario where I clearly have the access to copy the file.

The motive is to save the file exported from the file editor app into my iOS app using the action extension.

For more info please click herehttps://stackoverflow.com/q/48579778

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