uidocumentpickervc

I'm working in app to pick photo, I have used UIDocumentMenuViewController to display list of extensions for document provider. This list shows Dropbox, iCloud, GoogleDrive but not the native Photos app, why? Sample of my code: UIDocumentMenuViewController *menuVC = [[UIDocumentMenuViewController alloc] initWithDocumentTypes:@[@"public.image"] inMode:UIDocumentPickerModeImport]; I'm not sure if there is another way natively to do this, but I came up with a solution to add a custom option with handler. I added "Photos" option and in the handler I use UIImagePickerViewController :

I was learning a little more about ios extensions, such as: Today Extension Photo editing Extension Action Extension Custom keyboard Extension In all of them I did not have difficulties in learning, but recently I try to learn the "document provider extension", and to my surprise not found any relevant tutorial on the Internet talking about how to use it (step by step as the others). The only alternative I found was use the documentation, and I learned that he can access shared documents from other applications, and you can also share your own existing documents within your app. The only