Crashes when used with SwiftUI

[ablaw123]

When I call the researchkit from a swiftui button it crashes with the error "unrecognized selector sent to instance". Specifically, if I have a task that requires more than one screen.

Below is a sample of my code:

import SwiftUI
import UIKit
import ResearchKit

struct SurveyView: UIViewControllerRepresentable {
    @Environment(\.presentationMode) var presentationMode
    
    func makeCoordinator() -> Coordinator {
        Coordinator()
    }
    
    typealias UIViewControllerType = ORKTaskViewController
    func makeUIViewController(context: Context) -> ORKTaskViewController {

        let taskViewController = ORKTaskViewController(task: ConsentTask, taskRun: nil)
        taskViewController.view.tintColor = UIColor(red:0.64, green:0.15, blue:0.11, alpha:1.00)
        taskViewController.delegate = context.coordinator

        return taskViewController
    }
    
    func updateUIViewController(_ taskViewController: ORKTaskViewController, context: Context) {

    }
    
    class Coordinator: NSObject, ORKTaskViewControllerDelegate {
        func taskViewController(_ taskViewController: ORKTaskViewController, didFinishWith reason: 
            ORKTaskViewControllerFinishReason, error: Error?) {
            taskViewController.dismiss(animated: true, completion: nil)
        }
    }
}

[priyanka16]

Hi @ablaw123,
Did you find the solution for the problem you mentioned above. I'm trying to achieve the same behavior like you mentioned above.

But getting this crash:
[SwiftUI.AppDelegate window]: unrecognized selector sent to instance 0x600002aa8870
Xcode Version: 13.2.1
ResearchKit Version: 2.0.0

Thanks.

[raafaelima]

Hey Folks,

Due to the adoption of scenes and the scene delegate, the app delegate no longer has a window property by default. You must add a property var window: UIWindow? to your app delegate file.

import SwiftUI
import HealthKit

@main
struct MyApp: App {

    @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

final class AppDelegate: NSObject, UIApplicationDelegate {
    
    //Just need to add this
    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
        print("Application did finish launching with options")
        return true
    }
}

However, this "workaround" seems to make the modal have a transparent title. That you can solve this by setting the background color of the navigation bar to white (or the color of your preference) as @xinsight said in it answer. Also, you can use the same logic, and apply it to the ORKTaskViewController by setting the same properties, before presenting it.

let taskViewController = ORKTaskViewController(task: withdrawTask(), taskRun: nil)
taskViewController.delegate = self
taskViewController.navigationBar.backgroundColor = .white
// This step is optional
taskViewController.navigationBar.prefersLargeTitles = false
present(taskViewController, animated: true, completion: nil)

[raafaelima]

Also, if you are using a subclass of ORKTaskViewController for some reason, it will be at the center of the SwiftUI view and not be on the entire screen as you expect. This is a thing that I still trying to solve, but have no idea how yet.

[cbaker6]

@raafaelima #1469 should have solved the clear nav bar issue for you.