Clash Royale CLAN TAG#URR8PPP

Calling method in another view controller from modal view controller using a delegate

I am using a modal segue to create a view controller that I want to dismiss and then call a method in the origin view controller. I have used a protocol/delegate pattern but for some reason the method is never called. The code is below: Please note that I removed a lot of non-relevant code to keep it clean here

Thanks!!

VC1:

final class WorkoutViewController: UIViewController, StartWorkoutButtonDelegate

weak var dataSource: WorkoutViewControllerDataSource!
private var workout: Workout!
private var workoutDataViewController: WorkoutDataViewController?
private var workoutFinishViewController: WorkoutFinishViewController?
private let workoutFinishViewControllerSegueIdentifier = "Workout Finish View Controller Segue"

@IBOutlet private var primaryActionButton: UIButton!
@IBOutlet private var pageControl: UIPageControl!

// MARK: - Handling View Lifecycle

override func viewDidLoad()
super .viewDidLoad()
let workoutType = dataSource.workoutType(for: self)
workout = Workout(workoutType: workoutType, managedObjectContext: persistentContainer.viewContext)
setPrimaryActionButtonLabel()


// MARK: - Handling Storyboard Segues

override func prepare(for segue: UIStoryboardSegue, sender: Any?)
super.prepare(for: segue, sender: sender)

if let destinationWorkoutFinishViewController = segue.destination as? WorkoutFinishViewController
workoutFinishViewController = destinationWorkoutFinishViewController



// MARK: - Managing Start and Pause

@IBAction func startOrPauseWorkout()
if workout.isPaused
startWorkout()
else
pauseWorkout()




VC 2:

protocol StartWorkoutButtonDelegate: AnyObject
func startOrPauseWorkout()


class WorkoutFinishViewController: UIViewController

weak var delegate: StartWorkoutButtonDelegate?

@IBAction func startWorkout()
self.delegate?.startOrPauseWorkout()
self.dismiss(animated: true, completion: nil)


@IBAction func finishWorkout()


override func viewDidLoad()
super.viewDidLoad()





1 Answer
1

Here set the delegate

override func prepare(for segue: UIStoryboardSegue, sender: Any?)
super.prepare(for: segue, sender: sender)
if let destinationWorkoutFinishViewController = segue.destination as? WorkoutFinishViewController
destinationWorkoutFinishViewController.delegate = self




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