Reload tableView after Alert dismiss?

Question

I want to call table.reloadData() when I dismiss my UIAlertController. But I don't know how to do it.

I tried putting table.reloadData() in ViewController's viewWillAppear but it doesn't work because Alert's modalPresentationStyle cannot be changed.

I'm presenting alertController like so:

`let alert = UIAlertController(title: "Some Title", message: "Enter a text", preferredStyle: .alert)

alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert] (_) in
 let enteredTitle = alert!.textFields![0]
 let enteredNoteDescription = alert!.textFields![1]
 
 //Save to DB
 let note = Note(context: CoreDataService.managedObjectContext)
 note.title = enteredTitle.text
 note.noteDescription = enteredNoteDescription.text
 CoreDataService.saveContext()
 }))

present(alert, animated: true, completion: nil)`

Answer 1

 func showErrorAlertWithAction( withTitle: String,
                               andMessage: String,
                               buttonName: String,
                               completion: @escaping (() -> Void))
{
    let alert = UIAlertController(title: withTitle, message: andMessage, preferredStyle: .alert)
    let action = UIAlertAction(title: buttonName, style: .default) { _ in completion() }
    alert.addAction(action)
    DispatchQueue.main.async {
        self.present(alert, animated: true)
    }
}

Usage is:

    showErrorAlertWithAction(withTitle: "Some Title", andMessage: "Enter a text", buttonName: "OK") {
        // here you use action that will take effect after user taps "OK" button e.g:
        //Save to DB
        let note = Note(context: CoreDataService.managedObjectContext)
        note.title = enteredTitle.text
        note.noteDescription = enteredNoteDescription.text
        CoreDataService.saveContext()
    }

Answer 2

I've tried this solution and worked with me:

Suppose that your data source is:

var elements = ["first", "second", "third"]

and then your alert creation be like this:

let alert = UIAlertController(title: "Some Title", message: "Enter a text", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak self] _ in
     self?.elements.append("forth")
     self?.tableView.reloadData()
}))
present(alert, animated: true, completion: nil)

So As you see I've reloaded the table view in the action handler completion using self?.tableView.reloadData() and the worked fine with me. let me know if it didn't work with you