How can you reload a ViewController after dismissing a modally presented view controller in Swift?

Question

I have a first tableViewController which opens up a second tableViewcontroller upon clicking a cell. The second view controller is presented modally (Show Detail segue) and is d

Answer 1

Swift 5:

You can access the presenting ViewController (presentingViewController) property and use it to reload the table view when the view will disappear.

class: FirstViewController {
    var tableView: UITableView

    present(SecondViewController(), animated: true, completion: nil)
}

In your second view controller, you can in the viewWillDisappear method, add the following code:

class SecondViewController {
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)

        if let firstVC = presentingViewController as? FirstViewController {
            DispatchQueue.main.async {
                firstVC.tableView.reloadData()
            }
        }
    }
}

When you dismiss the SecondViewController, the tableview of the FirstViewController will reload.