CODEWITHSUNDEEP
swiftmacosappkitnsviewcontroller
Alexander Maslew
Alexander Maslew

Reputation: 408

ViewDidAppear not called automatically

I have a HomeViewController that is opening a WelcomeViewController using segue and is from type Sheet.

In WelcomeViewController the User is entering information and then closing(dismissing) it. After WelcomeViewController is closed I want to update HomeViewController by changing the String value of a TextField.

The Problem is, that ViewDidAppear in HomeViewController is not called after dismissing WelcomeViewController. I did not have this Problem before when developing for iOS.

How can I fix this? I tried to call it manually but got problems, because my IBOutlets were set to nil and I could not change the text in my TextField.

This is the code that invokes the segue: 

self.performSegue(withIdentifier: "welcome", sender: self)

this is my viewDidAppear in HomeViewController:

override func viewDidAppear() {
   super.viewDidAppear()
   if (CoreDataAccess().countUsers() == 0) {
       self.performSegue(withIdentifier: "welcome", sender: self)
   } else {
       //continue execution..
   }
}

In WelcomeViewController I dismiss the ViewController using this code

dismiss(self)

Upvotes: 0

Views: 1733

Answers (2)

Alexander Maslew
Alexander Maslew

Reputation: 408

This is how I solved it using a delegate. Thanks to @ullstrm for the suggestion.

First I added this protocol to HomeViewController

protocol WelcomeDelegate {
    func insertData(_ name: String, birthday: Date)
}

Then this prepare(for segue:)

override func prepare(for segue: NSStoryboardSegue, sender: Any?) {
    if let destinationViewController = segue.destinationController as? WelcomeViewController {
        destinationViewController.delegate = self
    }
}

And this extension at the bottom (I know it's not ok to call viewDidAppear manually , but it's working for now)

extension HomeViewController : WelcomeDelegate {
    func insertData(_ name: String, birthday: Date) {
        viewDidAppear()
    }
}

Then in WelcomeViewController I added this variable

var delegate:WelcomeDelegate? = nil

And this line right before dismiss(self)

self.delegate?.insertData(tfName.stringValue, birthday: dpAge.dateValue)

Upvotes: 1

Raul Mantilla
Raul Mantilla

Reputation: 344

Add your code to ViewWillAppear() instead of ViewDidAppear().

or you call a method in the HomeViewController when dismissing WelcomeViewcontroller

dismiss(animated: true) {
   self.presentedViewController.myMethod()
}

Upvotes: 0

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