I have done the same thing in SwiftUI using UIViewRepresentable, but toolPicker doesn't show so I checked isFirstResponder property and I found that it was still false after I called canvas.becomeFirstResponder().
Check this out:
struct NoteCanvasView: UIViewRepresentable {
func makeUIView(context: Context) -> PKCanvasView {
let canvas = PKCanvasView()
canvas.drawingPolicy = .anyInput
canvas.delegate = context.coordinator.self
let toolPicker = PKToolPicker()
toolPicker.setVisible(true, forFirstResponder: canvas)
toolPicker.addObserver(canvas)
print(canvas.canBecomeFirstResponder)
canvas.becomeFirstResponder()
print(canvas.isFirstResponder)
return canvas
}
func updateUIView(_ canvas: PKCanvasView, context: Context) {
canvas.becomeFirstResponder()
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
class Coordinator: NSObject {
var parent: NoteCanvasView
init(_ parent: NoteCanvasView) {
self.parent = parent
}
}
}
I found canvas.canBecomeFirstResponder returns true and canvas.isFirstResponder always returns false.
Is this a bug in current version of SwiftUI??