Programmatically scroll pdf in UIDocumentInteractionController

Question

I'm showing a pdf file inside a UIDocumentInteractionController, like this:

let docController = UIDocumentInteractionController(url: documentsURL)
    let url = NSURL(string:"itms-books:");
    if UIApplication.shared.canOpenURL(url! as URL) {
        docController.delegate = self
        docController.presentPreview(animated: true)
    }

I need to automatically scroll to the last page when the controller is shown, is there a way to do that? I didn't find one. Thanks to anyone who will send help!

Ashraf Tawfeeq · Accepted Answer · 2020-06-03 09:45:20Z

1

I am afraid there is not a straight forward solution for this, even the documentation says it's a UIViewController but Xcode shows it is inherited from NSObject. I'd recommend either rendering the PDF on a WKWebView or a UIScrollView. This will give you a room to wiggle.

answered Jun 3, 2020 at 9:45

Ashraf Tawfeeq

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4 Comments

Silvia Over a year ago

Thank you so much, you confirmed my sad hypothesis! :( The point is: I need to show the pdf in a modal view, I previously used a WebView and worked perfectly but I need the user to be able to at least save the file..any hint for this? Thanks again

Ashraf Tawfeeq Over a year ago

Maybe a custom button with a share option and you can use UIActivityViewController to do the trick for you.

Silvia Over a year ago

yeah I was thinking about a custom navigation bar similar to that one of the UIDocumentInteractionController. Last trial with UIDocumentInteractionController: have you figured out what annotations are for?

Ashraf Tawfeeq Over a year ago

I believe they are used for the options menu so other apps can extract a meta data like information to better handle it if they were used as a share option.

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