Swiftui pencilkit. Sep 26, 2023 · PencilKit — This is a drawing framework introduced in iOS 13 that allows us to create custom, canvas-based applications. Implement the methods of the PKCanvasViewDelegate protocol to monitor drawing events in a PKCanvasView object. Apr 26, 2021 · In short, I need a cutomizable pencil that would allow me to detect touches and to draw directly by reading them. ViewController. But when I use pencilkit PKToolPicker, there is not Fill Tool. iOS 13. 1. 1+ visionOS 1. You can draw 2D graphics in SwiftUI using Shape API, but in the end, the framework converts all the shapes into SwiftUI views and render them. Jun 27, 2020 · There were a lot of new surprises from the world of SwiftUI, ARKit, PencilKit, Create ML, and Core ML. I set up a minimal code example to show my problem: var body: some View {. image(from: imgRect, scale: 1. It makes easy to incorporate hand-drawn content into iOS apps quickly and easily. It provides a set of APIs and stoner interface rudiments that can be Aug 5, 2023 · In PKCanvasRepresentation. We will use Apple's PencilKit framework, equipped with an intuitive drawing canvas and a rich set of tools for making handwritten notes and sketches. List of student submissions for the WWDC 2020 Swift Student Challenge. Hear the technical details that make a great Apple Pencil experience. Create a CustomViewFactory conforming to the SDK's ViewFactory protocol. Most of the time, SwiftUI will do its Layout Magic and life will be wonderful. Apple’s Vision framework got bolstered with a bunch of exciting new APIs that perform some complex and critical computer vision algorithms in a fairly straightforward way. Check out the YouTube Playlist to watch the submissions. Jan 10, 2022 · import SwiftUI import PencilKit struct CanvasView {@Binding var canvasView: PKCanvasView} Gördüğünüz üzere yukarıda bir UIKit gürünümü olan, Binding bir PKCanvasView değişkeni ekliyoruz. Not sure what I'm missing here. IT & Software. This looks like a much better solution. Any help would be appreciated. By default, the colors on your PencilKit canvas dynamically adjust to Dark Mode, so people can create content in either mode and the results will look great in both. redを生成しています。. In NoteToolbarView I build an overview of buttons that should be used to select the tools. zero, size: drawingSize) image = canvasView. 標準的な色がColor構造体のプロパティとして定義されていますので、プロパティを指定するだけでその色のViewが生成できます。. And I made pencilKit in swift So as an image that I add in this question. Explore the latest improvements to our drawing and annotation framework, and discover how you can take advantage of APIs like PKToolPicker, PKCanvasView, and PKStroke to support new features in illustration and writing apps. Specifically, determine the start- and end-of-event sequences using the currently selected tool, and determine when those events affect the drawn content. However, when I test the app on VisionOS 1. Here's my CanvasView: import SwiftUI. This is how I solved this problem to allow drawing over the image and saving both in one final image. My app shows PDF files using the PDFKit and lets users make annotations on pdf files through my own code using UIKit and CoreGraphics frameworks. As seen above, I tried to initially get around this by having the drag gesture preceded by a long press, to no avail. The first one we are going to explore is GeometryReader. 2019년 Introducing PencilKit과 2020년 Jan 19, 2020 · And another potential solution could be to use both, by have a mapping between your PencilKit drawing and the points found from the technique in this tutorial. May 27, 2020 · PencilKit为iOS应用程序提供了一个绘图环境，该环境可以从Apple Pencil或用户的手指中获取输入，并将其转换为您在iOS或macOS中显示的高质量图像。. But the one that stood out for me was computer vision. Mar 12, 2023 · So there's no need to add scroll views or pan gestures, just set the canvas content's size, zoom scales and insets. Note: PencilKit requires Xcode 11 and iOS 13. bounds) toolPicker. SPONSORED For a smooth and performant SwiftUI app you need to look beyond the powerful presentations and animations available and understand view identity and how the data moves through your app. Now if I read the PKTool documentation, it says: Don’t adopt this protocol in your own objects. To get the most out of this session Feb 27, 2021 · Seems that the DragGesture is conflicting with the PencilKit in some way (is it implemented internally as a DragGesture?). Then type your project name and check out we are using fully SwiftUI with SwiftUI Lifecycle and we also use core data so check mark on it also. I wasn't sure which delegate to use and really struggling understanding how to refresh the canvas. Fortunately, we can draw rich 2D graphics without combining multiple shapes. Here, I have created one struct and showing Dec 20, 2019 · I'm trying to use PencilKit in SwiftUI. Bellow is the minimal reproducible code. 1 RC Simulator, I can pick an inking tool but when I try to draw on the canvas, it just scrolls Oct 14, 2019 · It’s now available on iOS 13. Jun 29, 2020 · Strokes disappearing in SwiftUI PencilKit I was really comfortable using PencilKit in SwiftUI, however I revisited a project and apparently there is a bug in Xcodes new version where strokes disappear after drawing them in the simulator. For these moments, we have several tools. Log In / Sign Up; Advertise on Reddit; Implement the methods of PKToolPickerObserver to detect when the user changes the configuration of a PKToolPicker view. I add the canvas as an overlay for the Image and store the drawing in seperate image. PencilKit also creates a `Canvas` to draw over it with various given tools. import SwiftUI import PencilKit struct PencilView: UIViewRepresentable { @Binding var canvas:PKCanvasView let toolPicker = PKToolPicker() func makeCoordinator() -> Coordinator { return Coordinator(parent: self) } func makeUIView(context: Context) -> PKCanvasView { toolPicker. Nov 10, 2023 · Here I am going to create simple demo of pencilKit using swiftUI. However, there are times (many times), when we require more control over the layout of our custom views. Forums > SwiftUI. 不过PencilKit还是基于UIKit的，如何在SwiftUI中使用，本文来教你。. Overview. When using PKCanvasView and PKToolPicker in a SwiftUI project using Xcode 13, the PKToolPicker disappear when I blur the view, and it doesn't come back when I remove the blur effect. SwiftUI is a development framework designed to make building user interfaces easier than ever, according to Craig Federighi, Apple’s senior vice president of Software Engineering. Hi all, I was trying to figure out how to get a UIViewRepresentable of a PKCanvasView to work in SwiftUI with the ability for a parent view to manage undo and redo functionality. We’ll leverage this framework for handling the input. PencilKit provides a drawing environment for your iOS app that receives input from Apple Pencil or the user’s finger, and turns it into images you display in iPadOS, iOS, or macOS. Code works fine when I click on a image and open a canvas view then close it and reopen it. May 24, 2020 · Create a drawing size: @State var drawingSize: CGSize = CGSize(width: 350, height: 80) Set the image size using that drawing size and then save the image: let imgRect = CGRect(origin: CGPoint. Mar 20, 2020 · So I have a ViewController which I'm using to set up the PencilKit part of my app, and inside it I have to set a PKToolPicker which depends on a UIResponder. For the strokes, you can access the property . You use these notifications to update the configuration of the underlying canvas. And now, with iOS13+, SwiftSignatureView automatically uses Nov 23, 2023 · This is all contained in a new file type called Data Model, which has the file extension “xcdatamodeld”. becomeFirstResponder () A structure representing the drawing information captured by a canvas view. Jul 23, 2021 · 1. func updateUIView(_ canvasView: PKCanvasView, context: Context) { } This certainly feels more like the intended approach for SwiftUI and is certainly more elegant than the attempts I made earlier. How can I detect in the updateUIView -function, which Binding -variable was updated? For example I don't want to clear the canvas when changing the color. これ以外に、色を指定する Jul 13, 2020 · I make drawing book apps. Instead, create a tool object to provide users with the desired the tool behavior. import UIKit. Sharing my code which I tried. Content View Apr 11, 2023 · Mastering Canvas in SwiftUI. I was really comfortable using PencilKit in SwiftUI, however I revisited a project and apparently there is a bug in Xcodes Dec 7, 2021 · Select iOS App and then select Application icon. black, width: 15) return canvasView. So in short: in order to toggle my canvas view's editability I have a @State var ( isDrawing ), which is toggled every time that the user clicks on a pencil icon in the navigation bar. To do so I have to write the following code: canvasView = PKCanvasView (frame: view. When you press Create, Xcode will open the new file in its data model editor. isDrawing. PKToolPicker from PencilKit does not show on programmatically created UIWindow. June 26, 2019 by javier. user14978817 user14978817. Dec 20, 2020 · swiftui; ios14; pencilkit; or ask your own question. You would save the drawing separately as a PKDrawing which is pretty convenient. drawing. Then I can draw over the maskArray (using Drawsana), and only allow black (erase) and white (draw), from there I can overlay my mask and use . Creating a Basic PencilKit Example Mar 4, 2023 · OK, this is how I solved my issue. 0+ Mac Catalyst 13. Apple today unveiled several technologies designed to make it easier and faster for developers to create new apps. Please keep content related to SwiftUI only. class DrawingBoardViewController: UIViewController {. var canvasView: Binding<PKCanvasView>. This solution makes the canvas for drawing exactly the size of the image. What is QuickDraw Feb 12, 2024 · Introduction To PencilKit. io/try-for-free/Using PencilKit and SwiftUI: Learn how to add freeform drawing, note taking, collaborative chat me Jun 4, 2023 · SwiftUI에 PKCanvasView 결합하기 Hello, PencilKit! WWDC에서 PencilKit이 나온 세션을 봤다. PDFPage, a subclass of NSObject, defines methods used to render PDF pages and work with annotations, text, and selections. import Foundation import SwiftUI import PencilKit struct ContentView: View { var body: some View { CanvasRepresentable () } } struct CanvasRepresentable: UIViewRepresentable { class Coordinator Fill Tool for PencilKit PKToolPicker. To integrate PencilKit support to a SwiftUI project, add 'import PencilKit'. PencilKit is a drawing framework by Apple that allows developers to add hand-drawing and free-form creative writing support to their apps. isDrawing = !self. I already implemented a pen/marker tool. In CanvasView. @PointOfNilReturn. But!!! I really wanna take pictures in the photo roll so I wanna use that as the background of my canvasView. swift I use the initialisation and want to assign the individual tools through the given selection from NoteToolbarView. As a kid, I loved to draw small post-it flipbook animations and when Apple released PencilKit with iOS 13 I started working on a small prototype to see if this would work as a fun drawing app. And is there a better way to clear the canvas than toggling a boolean? Feb 2, 2024 · This tutorial teaches you how to implement freeform drawing, chat messaging, voice calling, and video calling into your SwiftUI apps. This article covers the basics of integrating PencilKit into your app and provides step-by-step instructions for implementing the PKToolPicker functionality. 実行例では、赤色を示すColor. Add a comment | Jun 13, 2023 · Abstract: Learn how to show and hide the PKToolPicker in your SwiftUI app using PencilKit. I got the toolKit in the UI but couldn't draw. The data object that the canvas uses to store drawn content. I can draw on canvas with only one stroke. contentSize = CGSize(width: 1500, height: 1000) For zooming, set the desired zoom scales: Sep 25, 2020 · PencilKit makes it easy to incorporate hand-drawn content into your iPadOS or macOS apps. 생각해 보니 지금까지 세 개나 봤다. . Xcode automatically create some boilerplate codes so lets just delete some codes. Jan 16, 2020 · Implementing PencilKit with PDFKit. And finally, I merge CanvasView and Jun 30, 2020 · WWDC2020「PencilKitの新機能」を見て、PencilKitを使っていないと思い立ち始める。 PencilKitを使って作りたいものが過去からあり、そこに向かって、最初の最初、スタートライン前。 とりあえずPencilKitを使う StoryBoardでPKCanvasView配置. Dec 21, 2020 · The DrawingWrapper uses a DrawingManager (SwiftUI) to pull from CoreData and the DrawingViewController to define a PKCanvas. I want to put that fill tool (or any similar filling tool) in my xcode app that I am building. I encapsulate PKCanvasView in UIViewRepresentable. However, the image will disappear immediately when I releas I would like uniformity in width when switching between pencil and finger. 0. I am going to use clear, undo and redo button for perform operation on drawing. swift. Since I would like to use the PencilKit framework to make annotations better, I’m in the process to implement the PencilKit framework but I’ve found some issues Apr 22, 2021 · func toggleIsDrawing() {. First I realised that my maskArray is only in black (background) and white (detected). Sep 24, 2020 · PencilKit is very nice for the low latency drawing and built-in set of features. Recognition is basically classification, no matter what you’re classifying, but in the interest of exploring a breadth of practical AI topics with you, here we build an app that lets you take a photo of a line-drawing and identify the drawing. The goal of this article is to walk you through the PencilKit architecture and its implementation with a simple iOS application. I spent a few days of research and found a solution that seems to work well. Mar '20. Feb 9, 2020 · SwiftUIではColor構造体を使って色を指定します。. This question is in a collective: a subcommunity defined by Nov 10, 2019 · Nov 10, 2019. The environment comes with tools for creating, erasing, and selecting lines. Oct 5, 2023 · You can perform advanced modifications to build custom video calling experiences using the following main steps. For Swift programming related content, visit r/Swift. Each time the user changes the selected tool or other drawing characteristics, the tool picker notifies any registered observers. Jan 5, 2023 · I was really comfortable using PencilKit in SwiftUI, however I revisited a project and apparently there is a bug in Xcodes new version where strokes disappear after drawing them in the simulator. PencilKit uses UIKit so we have it enclosed in a UIViewRepresentable this way: CanvasView I have a SwiftUI view to capture a user signature using a UIViewRepresentable PencilKit view. This approach has its pros and cons. 0+ iPadOS 13. This week we will learn how to use Canvas view in SwiftUI. class Coordinator: NSObject, PKCanvasViewDelegate {. luminanceToAlpha() so long as I make it a compositing group: Sep 26, 2023 · I am trying to create a pencil effect/texture for drawing on SwiftUI without using PencilKit if possible, but I am not sure how to do that. png) { image in if let pngData = image. It uses SwiftUI, ARKit, PencilKit, CoreML. xcdatamodeld. A PKCanvasView object captures content drawn using Apple Pencil or the user’s finger and displays it in your app. The problem is that it always redraws the whole drawing with all strokes. Mar 20, 2021 · In the below example you can see that you can toggle the canvas, but once the tool picker is visible, it stays visible. r/SwiftUI A chip A close button. After a couple of strokes the performance gets worse and I can feel a significant lag of the pencil line. After dabbling with UI creation and PencilKit for a bit, I decided to challenge myself with learning the newest, coolest technology I could think of, Augmented Reality (AR). Create a composition for your custom views with SwiftUI. swift playground app apple xcode quiz wwdc quicklook wwdc-scholarship naturallanguage wwdc-scholarship-submissions arkit coreml xcode-playground swiftui pencilkit wwdc20 swiftstudentchallenge Jun 3, 2019 · Apple unveils SwiftUI, ARKit 3, PencilKit, more. It’s using Apple’s new drawing framework PencilKit, so in this post I will Jan 11, 2021 · swiftui; pencilkit; Share. . For small drawings it is okay. Note: SwiftUI does not support PencilKit Mar 29, 2022 · I am trying to build a view in SwiftUI that allows me to draw on top of another view, for example a table, using PencilKit. Will I need to somehow need to reconcile this with a custom gesture recognizer? Nov 25, 2019 · Learn SwiftUI from Scratch click here to get the course because in this course we are going to build many apps using SwiftUI such as Facebook clone, News app, Notes app and much more. PencilKit helps power creativity, writing, drawing, and animation in your iPad apps. Get app Get the Reddit app Log In Log in to Reddit. You can retrieve the signature as a UIImage. swift I only initialise the canvas view. Then create the project. Now that you can look inside drawings and access the strokes, inks, paths and points, inspect what the user wrote and drew to build features like the new Scribble experience which uses PencilKit to enable handwriting in text fields across the whole of iPadOS. import PencilKit. import SwiftUI. Dec 5, 2021 · swiftUI PencilKit的简单使用 // PencilView. Accounting & Bookkeeping Compliance Cryptocurrency & Blockchain Economics Finance Finance Cert & Exam Prep Financial Modeling & Analysis Investing & Trading Money Management Tools Taxes Other Finance & Accounting. A PDFOutline object is an element in a tree-structured hierarchy that can represent the structure of a PDF Apr 28, 2023 · in a project we are working on using SwiftUI and PencilKit we are required to create a button that while being tapped, changes the PKInkingTool of the PKCanvasView we are using. @IBOutlet weak var canvasView: PKCanvasView! PencilKit makes it easy to incorporate hand–drawn content into your iPadOS or macOS apps but it also works for iOS. This is bound with a @Binding property with the canvas view's editable property. It leverages Metal to achieve high-performance rendering, while offering a simple programming interface to make it easy to create games and other graphics-intensive apps. I just released FlipKit, a flipbook animation app for everyone who likes to draw. self. 4. I am trying to create a popup (to add some setting to the view), but here I simplify the example to just just to see the consequences of the blur effet. swift // PencilDraw // Created by wangxuncai on 2021/12/5. With code that varies the pen width based on the speed of the finger movement, the view generates fluid, natural looking signatures. pen, color: . Improve this question. In iOS Simulator, I've followed the basic steps to include PencilKit into my view controller. Jun 26, 2019 · GeometryReader to the Rescue. PencilKit allows developers to easily integrate the drawing canvas view and toolkit in their applications. 3. #SwiftUI, #iosdeveloper, #iosdevelopmentGitHub: https://github. The canvas view handles all of the touch events and data coming from Apple Pencil, and renders that information using the tool you specify. 0 | SwiftUI Complex UI | SwiftUI Image Pic Dec 21, 2022 · I want to use pencil kit in my swiftui app. sh/brianadventThis video was sponsored by Hello Guys 🖐🖐🖐🖐In this Video I'm going to show how to create a Photo Editor App that has the features of #apple Pencil Kit also the ability of adding tex Sep 23, 2020 · Saving PencilKit image – SwiftUI. I am running Version 14. swift playground app apple xcode quiz wwdc quicklook wwdc-scholarship naturallanguage wwdc-scholarship-submissions arkit coreml xcode-playground swiftui pencilkit wwdc20 swiftstudentchallenge Jun 14, 2020 · The first 1000 people to use this link will get a 2 month free trial of Skillshare Premium Membership: https://skl. setVisible Aug 25, 2023 · 简单来说PencilKit可以实现iPad自带画图工具的所有功能。Demo中只是简单实现了部分基础功能，代码都已经加上注释，有swiftUI基础应该都能看懂，就不多介绍啦。下面就部分细节进行说明。 Demo演示文件中的DrawingBoard就是自定义的Pencilkit的画板。 QuickDraw-SwiftUI-CoreML-PencilKit . 该环境附带了用于创建，擦除和选择线条的工具。. Dec 3, 2020 · 4. struct CanvasView: UIViewRepresentable {. Using PKToolPicker without PKCanvasView. Get started with Stream: https://getstream. Dec 16, 2021 · I have spent the past few months learning the basics of using a Mac and plugging away on Xcode, concentrating on developing Swift and SwiftUI fundamentals. Dec 2, 2021 · Drawing App on SwiftUI. 首先建立基本视图，其中注意PencilKit的主要对象有Canvas和PKDrawing，Canvas就是白板（也有叫画布的），PKDrawing就是在白板上画的图像了，它有函数 PencilKit with SwiftUI. canvas对象是您 Meet PencilKit, Apple's feature-rich drawing and annotation framework. For scrolling and panning, set a large canvas content size for the drawing area: canvasView. PencilKit provides a super easy way to add great Pencil support to your app. The great visual comes from Vy Tat. Recently, I’ve released my new drawing app, called Drawland. com/azam Strokes disappearing in SwiftUI PencilKit. public static var transferRepresentation: some TransferRepresentation {. renderBounds that gives you the dimensions of the rectangle where the stroke is into. Learn about the new screenshot editor and Hi, I have an app using PencilKit that works on VisionOS 1. To add your own project below, just edit this file and submit a pull request! Please read the PLEASE READ section before submitting. In Daniel Steinberg's newest book you’ll focus on data flow in SwiftUI from simple view composition, through @State, and @ObservableObject through For SwiftUI discussion, questions and showcasing SwiftUI is a UI development framework by Apple that lets you declare interfaces in an intuitive manner. tool = PKInkingTool(. With just a few lines of code, you can add a full drawing experience to your app — with access to a canvas, responsive inks, rich tool palette and drawing model. swift Hey r/iOSProgramming, . The app is now on available on Vision Pro AppStore as well. 11 2 2 bronze badges. This isn’t me guessing – Apple literally designed it in a highly SpriteKit is a general-purpose framework for drawing shapes, particles, text, images, and video in two dimensions. The resulting drawings can be displayed in iPadOS, iOS, or macOS. Add the custom composition to the makeYourCustomUI method. This is what I have for now, I would like to draw on the canvas with a pencil effect if I choose the pencil tool. 0) Set the content size: Mar 9, 2020 · canvasView. 您可以使用PKCanvasView对象在iOS应用中捕获内容。. The environment comes with tools for creating Feb 10, 2024 · When integrating PencilKit and PDFKit with SwiftUI, it's important to properly set up coordinators and delegates to ensure that all methods are being called correctly. Any leads would be helpful. PKDrawing doesn't allow you to store bitmaps (text from a textbox for example). I am adding a image coming from server on top of the PKCanvasView. 2. Mar 7, 2022 · 2. setVisible (true, forFirstResponder: canvasView) canvasView. Then inside our xc data model file we need to Jan 21, 2020 · PencilKit — This is a drawing framework introduced in iOS 13 that allows us to create custom, canvas-based applications. The canvas stores the captured input in a PKDrawingReference object. 0+. swift playground app apple xcode quiz wwdc quicklook wwdc-scholarship naturallanguage wwdc-scholarship-submissions arkit coreml xcode-playground swiftui pencilkit wwdc20 swiftstudentchallenge Jun 13, 2020 · 2019年，苹果官方为苹果笔的开发发布了PencilKit。. 2023-06-13 by DevCodeF1 Editors Mar 27, 2023 · I am creating a SwiftUI app with PencilKit & UIViewRepresentable. PencilKit has seamless support for macOS, iOS, and visionOS. Project Setup Hello Guys 🖐🖐🖐In this Video I'm going to teach how to create Photo Editor / Image Cropping Tool Using SwiftUI 4. Help people draw on top of existing content. swift playground app apple xcode quiz wwdc quicklook wwdc-scholarship naturallanguage wwdc-scholarship-submissions arkit coreml xcode-playground swiftui pencilkit wwdc20 swiftstudentchallenge Jan 17, 2023 · PencilKit is a frame introduced by Apple in iOS 13 that allows inventors to add support for Apple Pencil input to their apps. Dec 1, 2022 · However, SwiftUI’s integration with Core Data is different because it points very strongly in one direction: create the Core Data container once when the app starts, inject its managed object context into the environment, then perform fetch requests directly on there. So I can draw several things on the canvasView. pngData() {. Building app based on Apple Pencil require much cumbersome process but since the introduction of PencilKit in WWDC 20 it now easier to add Canvas and Apple Pencil Support It uses SwiftUI, ARKit, PencilKit, CoreML. Let’s create one now: press Cmd+N to make a new file, select Data Model from the list of templates, then name your model Bookworm. WWDC 2020 Swift Student Challenge Submissions. Follow asked Jan 11, 2021 at 20:39. Dec 7, 2021 · In this video, Mohammad Azam will demonstrate how to create a drawing app in SwiftUI. But there is only a predefined set of tools. For iOS programming related content, visit r/iOSProgramming An object that represents PDF data or a PDF file and defines methods for writing, searching, and selecting PDF data. Everything must be zoomable and the elements of the background view must be clickable. A coordinator is an object that acts as a bridge between SwiftUI and UIKit, allowing you to call UIKit methods from SwiftUI. It means, a user can pick an inking tool from PKToolPicker and draw on PKCanvasView. Expand user menu Open settings menu. In the recent WWDC 2022, FreeForm app was introduced and in that app in the tool picker there was a Fill Tool. Once I'm done with my drawing, I merge both images into one. Jan 7, 2023 · What is PencilKit? PencilKit is a drawing framework for iOS that enables users to create digital artwork using either Apple Pencil or their finger as input. Swiftui canva can do a lot. It felt pretty good early on, I especially liked how you can "flip" (swipe) through the page SwiftSignatureView is a lightweight, fast and customizable option for capturing signatures within your app. struct SignatureUI: View Jan 13, 2021 · An Introduction To PencilKit. PencilKit comes equipped with a range of tools for drawing, erasing, and selecting lines. DataRepresentation (exportedContentType: . SwiftUI and Vision — SwiftUI is the popular new declarative UI framework, and Vision abstracts complex computer vision algorithms with an easy-to-use API. PencilKit provides various tools for markup, such Having said that, here is a way that you might conform UIImage to Transferable for exporting: extension UIImage: Transferable {. Mobile Development Collective Join the discussion. 1 of Xcode. Using a rich set of animations and physics behaviors, you drawing. The view is capturing the signature just fine, but when I try to save the signature, the file saved is a blank/empty PNG file. var drawing: PKDrawing { get set } The data object that the canvas uses to store drawn content. Main Classes PencilKit also makes it easy to create a custom drawing canvas in your app and offer a state-of-the-art tool picker and ink palette. heamwxwkkfjzumycwqsb