PencilKit toolPicker is not showing up

Where and how do you define canvasView ?

Did you add it to view ?

I think you should have:

override func viewDidAppear(_ animated: Bool) {
  super.viewDidAppear(animated)

    let canvasView = PKCanvasView(frame: self.view.bounds)
  guard
  let window = view.window,
  let toolPicker = PKToolPicker.shared(for: window) else { return }

  toolPicker.setVisible(true, forFirstResponder: canvasView)
  toolPicker.addObserver(canvasView)
  canvasView.becomeFirstResponder()
  view.addSubview(canvasView)
}

canvasView is initalized in viewDidLoad:

canvasView = PKCanvasView(frame: view.bounds)

And did you add it as subview ?

Yep, I just copied and pasted your version of the code, and it's still not showing up. I can draw on the canvas. It's just there's no toolPicker.

I tested on simulator, this exact code:

import PencilKit


     override func viewDidAppear(_ animated: Bool) {
         
          super.viewDidAppear(animated) // Manquait
          setTempData()
          if #available(iOS 13.0, *) {
               let canvasView = PKCanvasView(frame: self.view.bounds)
               guard
               let window = view.window,
               let toolPicker = PKToolPicker.shared(for: window) else { return }
              
               toolPicker.setVisible(true, forFirstResponder: canvasView)
               toolPicker.addObserver(canvasView)
               canvasView.becomeFirstResponder()
               view.addSubview(canvasView)
          } else {
               // Fallback on earlier versions
          }
     }

works "well": I mean I see the pens at the bottom.

Added

               print(toolPicker.isVisible)

and get true in log

I just copied and pasted this exact code aside from the setTempData, and I don't see the pens at the bottom.

Yes, I really copied so setTempData() was superfluous !

Do you run on device or simulator ?

Which iOS version (iOS 13 required)

I'm running it on a simulator. It is iOS 13.

If you want, you can post an email address for a minute, so that we can share files.

I don't really feel comfortable giving my email address, but the project should be accessible on my Github: https://github.com/druvinskiy/InstaKids under the Firebrase branch.

I could not run your code, I miss JGProgressHUD.

But I noticed your code is not exactly the same I proposed:

you have:

    override func viewDidLoad() {
        super.viewDidLoad()
       
        setNavigationBar()
       
        let canvasView = PKCanvasView(frame: view.bounds)
        self.canvasView = canvasView
        canvasView.allowsFingerDrawing = true
        view.addSubview(canvasView)
       
        if let sketch = sketch {
            SketchService.downloadData(from: sketch.drawingUrl!) { (data) in
                self.canvasView.drawing = try! PKDrawing(data: data)
                canvasView.delegate = self
                self.saveButton.isEnabled = false
            }
        }
       
        canvasView.delegate = self
        saveButton.isEnabled = false
       
        canvasView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(canvasView)
       
        canvasView.backgroundColor = .offWhite
       
        setupToolPicker()
    }

and

    func setupToolPicker() {
        if let window = self.parent?.view.window,
            let toolPicker = PKToolPicker.shared(for: window) {
            toolPicker.setVisible(true, forFirstResponder: canvasView)
            toolPicker.addObserver(canvasView)
            canvasView.becomeFirstResponder()
            toolPicker.addObserver(self)
            updateTools(toolPicker)
        }
    }

In my case:

     override func viewDidAppear(_ animated: Bool) { 
          
          super.viewDidAppear(animated) // Manquait 
          setTempData() 
          if #available(iOS 13.0, *) { 
               let canvasView = PKCanvasView(frame: self.view.bounds) 
               guard 
               let window = view.window, 
               let toolPicker = PKToolPicker.shared(for: window) else { return } 
               
               toolPicker.setVisible(true, forFirstResponder: canvasView) 
               toolPicker.addObserver(canvasView) 
               canvasView.becomeFirstResponder() 
               view.addSubview(canvasView) 
          } else { 
               // Fallback on earlier versions 
          } 
     }

So, your window is:

self.parent?.view.window

in my case:

view.window

Why calling parent ?

Are you sure it is not nil ?

I'm having probably the same problem. I followed this tutorial https://medium.com/better-programming/an-introduction-to-pencilkit-in-ios-4d40aa62ba5b

In a new project, it works fine. But in my existing project, I can draw, but I can't see the tool palet. Anyone have any ideas what might cause the palet to not appear?

iOS 14.5

import UIKit
import PencilKit

class DrawingCanvasViewController: UIViewController {

    lazy var canvasView: PKCanvasView = {
       let canvasView = PKCanvasView()
        canvasView.drawingPolicy = .anyInput
        canvasView.translatesAutoresizingMaskIntoConstraints = false
        return canvasView
    }()

    lazy var toolPicker: PKToolPicker = {
       let toolPicker = PKToolPicker()
        toolPicker.addObserver(self)
        return toolPicker
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(canvasView)
        canvasView.frame = view.bounds
        toolPicker.setVisible(true, forFirstResponder: canvasView)
        toolPicker.addObserver(canvasView)
        canvasView.delegate = self
        canvasView.becomeFirstResponder()
    }
}

extension DrawingCanvasViewController: PKToolPickerObserver, PKCanvasViewDelegate {
}

The thing was here:

    lazy var toolPicker: PKToolPicker = {
       let toolPicker = PKToolPicker()
        toolPicker.addObserver(self)
        return toolPicker
    }()

You need to make the tool picker lazy var and add observer to itself. Thanks to Recoding Channel on Youtube Nice tutorial https://youtu.be/f2SHsHsjTGM