Since updating to iOS17, lasso no longer works in Pencilkit with SwiftUI support using UIViewRepresentable. It works in PKToolPicker, but the programmatically created PKLassoTool does not work. How can I get lasso to work?
iOS 17.1 appears to me to have resolved this issue.
We also checked it today and plan to update it in this version. Thank you all for your hard work
This is the simplest reproduction code; Lasso works in 16.4, but not in 17.
import SwiftUI
import PencilKit
struct ContentView: View {
@State var canvas = CanvasTest()
var body: some View {
VStack {
canvas
Text("Pen")
.onTapGesture {
canvas.canvasView.tool = PKInkingTool(ink: PKInk(.pen), width: 4)
}
Text("Lasso")
.onTapGesture {
canvas.canvasView.tool = PKLassoTool()
}
}
.padding()
}
}
struct CanvasTest: UIViewRepresentable {
let canvasView = PKCanvasView()
func makeUIView(context: Context) -> some PKCanvasView {
canvasView.drawingPolicy = .anyInput
canvasView.tool = PKInkingTool(ink: PKInk(.pen), width: 20)
canvasView.delegate = context.coordinator
return canvasView
}
func updateUIView(_ uiView: UIViewType, context: Context) {
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
}
extension CanvasTest {
final class Coordinator: NSObject, PKCanvasViewDelegate {
var parent: CanvasTest
init(_ uiView: CanvasTest) {
self.parent = uiView
}
}
func canvasViewDrawingDidChange(_ canvasView: PKCanvasView) {
canvasView.tool = PKLassoTool()
}
}
Sorry, this one is even simpler.
import SwiftUI
import PencilKit
struct ContentView: View {
@State var canvas = CanvasTest()
var body: some View {
VStack {
canvas
Text("Pen")
.onTapGesture {
canvas.canvasView.tool = PKInkingTool(ink: PKInk(.pen), width: 4)
}
Text("Lasso")
.onTapGesture {
canvas.canvasView.tool = PKLassoTool()
}
}
.padding()
}
}
struct CanvasTest: UIViewRepresentable {
let canvasView = PKCanvasView()
func makeUIView(context: Context) -> some PKCanvasView {
canvasView.drawingPolicy = .anyInput
canvasView.tool = PKInkingTool(ink: PKInk(.pen), width: 20)
return canvasView
}
func updateUIView(_ uiView: UIViewType, context: Context) {
}
}
Our service is also experiencing the same problem. Is there still no solution?
Thank you for your comment. Unfortunately, this issue has not yet been resolved and we are inquiring with TSI. When we get an answer we will share it with you.
Following the response from Technical Support, I filed a bug report with Feedback Assistant. According to Technical Support, OS or framework fix is probably needed. If we have further information, we will share it.
That's very unfortunate. Thank you for the information!
My solution is a bit hacky. I added the built-in tool PKToolPicker and displayed the tools. When selecting Text("Lasso"), I set self.toolPicker.setVisible(true, forFirstResponder: context.coordinator) so that PKLassoTool can be used. When selecting other tools, I set self.toolPicker.setVisible(false, forFirstResponder: context.coordinator).
It's quite cumbersome, and I hope there is a better way.
let toolPicker = PKToolPicker()
func makeCoordinator() -> Coordinator {
Coordinator()
}
class Coordinator: NSObject, PKToolPickerObserver {
....
}
Just to add that this is also affecting my UIKit app too. Any update yet?
I have not received any response from Apple's engineering team. I will let them know that you are having the same problem with UIKit.
Thank you!
iOS 17.1 appears to me to have resolved this issue.
We also checked it today and plan to update it in this version. Thank you all for your hard work
