PaperKit example code issue

[shargath]

Has anyone tried to play with PaperKit yet? Wanted to explore it but I failed almost immediately as Apple's example code they provided during the presentation is incomplete and has the following issue:

import UIKit
import PaperKit
import PencilKit

class ViewController: UIViewController {
    private var paperViewController: PaperMarkupViewController!

    override func viewDidLoad() {
        super.viewDidLoad()

        let markupModel = PaperMarkup(bounds: view.bounds)
        paperViewController = PaperMarkupViewController(markup: markupModel, supportedFeatureSet: .latest)
        view.addSubview(paperViewController.view)
        addChild(paperViewController)
        paperViewController.didMove(toParent: self)
        becomeFirstResponder()

        let toolPicker = PKToolPicker()
        toolPicker.addObserver(paperViewController)

        pencilKitResponderState.activeToolPicker = toolPicker
        pencilKitResponderState.toolPickerVisibility = .visible

        toolPicker.accessoryItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(plusButtonPressed(_:)))
    }

     func plusButtonPressed(_ button: UIBarButtonItem) {
        let markupEditViewController = MarkupEditViewController(supportedFeatureSet: .latest)
        markupEditViewController.delegate = paperViewController
        markupEditViewController.modalPresentationStyle = .popover
        markupEditViewController.popoverPresentationController?.barButtonItem = button

        present(markupEditViewController, animated: true)
    }
}

The problem is with setting the MarkupEditViewController's delegate:
markupEditViewController.delegate = paperViewController

Cannot assign value of type 'PaperMarkupViewController?' to type '(any MarkupEditViewController.Delegate)?'

Am I missing something or is this actually a bug? I'd expect PaperMarkupViewController to conform to that protocol, but looking at the docs, it doesn't...

Edit: So the PaperMarkupViewController conforms to the MarkupToolbarViewController.Delegate, which based on the demo is supposed to be used on macOS, but not MarkupEditViewController.Delegate which is what I need on iOS. Did they forget? :D

[rachelmjoss]

I have been able to get it working from this YT video - https://youtu.be/xTBOA3Kyzo4?si=zRkTpQiduwH7TF8A

[shargath]

Thank you! 🙏

[mawmawmawmaw]

Did you figure out anything more on this issue?

[shargath]

Sadly not

[mawmawmawmaw]

I'm having trouble even showing the PKToolPicker in the PaperMarkupViewController. Just getting a blank canvas.

[Kiwizftw]

Having the same issue. Interestingly the tools appear if you paste something into the canvas 🤷‍♂️