iOS Share Extension issue with ItemProvider can't read from Photo library

Question

I used the Solution form iOS Share Extension issue when sharing images from Photo library to get Images from the Photo App. This works great in the Simulator, but on the Device I get an error that I can't Access the NSURL provided by the itemProvider:

2018-02-18 12:54:09.448148+0100 MyApp[6281:1653186] [default] [ERROR] Failed to determine whether URL /var/mobile/Media/PhotoData/OutgoingTemp/554581B2-950C-4CFD-AE67-A2342EDEA04D/IMG_2784.JPG (s) is managed by a file provider

Caused by the Statment:

[itemProvider loadItemForTypeIdentifier:itemProvider.registeredTypeIdentifiers.firstObject options:nil completionHandler:^(id<NSSecureCoding> item, NSError *error) {
}

Searching PHAsset for the Item Name is not a good solution as the user have to grand access to the photo library again.

Answer 1

In didSelectPost you must not dismiss the ShareExtension ViewController until you have processed all the items in the inputItems array. The ViewController is dismissed using [super didSelectPost] or by calling the completion method of the extension context.

Here is my solution in code:

- (void)didSelectPost {

__block NSInteger itemCount = ((NSExtensionItem*)self.extensionContext.inputItems[0]).attachments.count;
__block NSInteger processedCount = 0;
for (NSItemProvider* itemProvider in ((NSExtensionItem*)self.extensionContext.inputItems[0]).attachments ) {

    if([itemProvider hasItemConformingToTypeIdentifier:@"public.jpeg"]) {
        NSLog(@"itemprovider = %@", itemProvider);

        [itemProvider loadItemForTypeIdentifier:@"public.jpeg" options:nil completionHandler: ^(id<NSSecureCoding> item, NSError *error) {

            NSData *imgData;
            if([(NSObject*)item isKindOfClass:[NSURL class]]) {
                imgData = [NSData dataWithContentsOfURL:(NSURL*)item];
            }
            if([(NSObject*)item isKindOfClass:[UIImage class]]) {
                imgData = UIImagePNGRepresentation((UIImage*)item);
            }
            NSDictionary *dict = @{
                                   @"imgData" : imgData,
                                   @"name" : self.contentText
                                   };
            NSUserDefaults *defaults = [[NSUserDefaults alloc] initWithSuiteName:@"group.share.extension1"];
            [defaults setObject:dict forKey:@"img"];
            [defaults synchronize];
            processedCount += 1;
            if (processedCount == itemCount)
                [super didSelectPost];
        }];
    }
}