Get file name of copied document off UIPasteBoard - ios

Question

I am trying to add a feature to an existing iOS app so that documents "copied" within Mail (say a PDF) can be pasted into my app.
After a PDF document is viewed in Mail and "Copy" chosen from the Action menu, within my app's code, when I inspect:
[[UIPasteboard generalPasteboard] items]
I can see the document as per:
{
"com.adobe.pdf" = {length = 875113, bytes = 0x25504446 2d312e35 0d0a25b5 b5b5b50d ... 300d0a25 25454f46 };
}
)
And further retrieve it via:
po [[UIPasteboard generalPasteboard] valueForPasteboardType:#"com.adobe.pdf"]
<OS_dispatch_data: data[0x2820e5c00] = { leaf, size = 875113, buf = 0x1125e0000 }>
However, is there any way to get the document's name? In the Files.app when I paste the same document it gets pasted as the original file name.
Should I be using the pasteboard for this, or if there another API which can get access to the copied document with the file name?

Answer 1

Even if this question is a little older I happened to search for the same and finally found the solution. So for future reference:
Starting with iOS 11 UIPasteboard contains an array itemProviders which gives you all the information about the objects that are available. The same is used for Drag/Drop.
So with the following logic you can save the items to a certain path:
NSArray *items = [[UIPasteboard generalPasteboard] itemProviders];
for (NSInteger i = 0; i < itemProvider.count; i++) {
NSItemProvider *itemProvider = itemProvider[i];
NSString *identifier = itemProvider.registeredTypeIdentifiers[0];
[itemProvider loadDataRepresentationForTypeIdentifier:identifier completionHandler:^(NSData * _Nullable data, NSError * _Nullable error) {
NSMutableDictionary *result;
if (!error) {
NSString *ext = (__bridge NSString *)(UTTypeCopyPreferredTagWithClass((__bridge CFStringRef _Nonnull)(identifier), kUTTagClassFilenameExtension));
if ([ext isEqualToString:#"jpeg"]) {
ext = #"jpg";
}
NSString *mime = (__bridge NSString *)(UTTypeCopyPreferredTagWithClass((__bridge CFStringRef _Nonnull)(identifier), kUTTagClassMIMEType));
if (!mime) {
mime = #"application/*";
}
NSString *filename = itemProvider.suggestedName;
NSString *path = [folderPath stringByAppendingPathComponent:filename];
[data writeToFile:path options:NSDataWritingAtomic error:&error];
}
}
}