I'm looking for guidance on how to prepare a PDF for inserting a digital certificate on iOS without a commercial 3rd party tool. The idea is to... Set up a signature annotation with PDFKit, Set up/prepare the PDF with the required information (contact info, adbe.pkcs7.detached, the Adobe.PPKLite filter , info/annotation reference, the UTC time, etc.) Pad the content area with zeros (I believe it would 4096 Then compute the hash. I am following Adobe's Spec (Acrobat_DigitalSignatures_in_PDF) Would this be possible with parsing out and adding the data from a byte stream? Can I simply build the signature object on my own and place them into the PDF, or are there any other items I need to change. Are there any tools out there that can help me manipulate the data and/or get the document hash easily? For example the data would look something like this is... <</ByteRange [0 552215 560537 907] /ContactInfo (my contact info)/Contents < AREA OF ZERO PADDING FOR CERT INSET) 00>/Filter /Adobe.PPKLite/M (D:20240223095734Z)/Reason (Some reason)/Reference [<</Data 13 0 R/TransformMethod/FieldMDP/TransformParams 39 0 R/Type/SigRef>>]/SubFilter /adbe.pkcs7.detached/Type /Sig>> Thank you

Is it possible to pick a video with the MPMediaPickerController or is this only for audio?Any (home videos) that I add to the iPad appear in the Home VIdeos section of the iPad. Yet, when using the MPMediaPickerController, the videos do not appear in the picker. I've tried the different mediaTypes, but they have no effect. func pickVideo() { #if !(TARGET_IPHONE_SIMULATOR) let picker = MPMediaPickerController(mediaTypes:.Any) picker.delegate = self picker.showsCloudItems = false picker.allowsPickingMultipleItems = true picker.prompt = "Choose a video" picker.modalPresentationStyle = .PageSheet picker.preferredContentSize = CGSizeMake(500,600) self.presentViewController(picker, animated: true, completion: nil) #endif }