Calling reload Sections from AppDelegate

Question

I am building an app to track BLE devices, and I have a delegate (in appDelegate) that updates the list of discovered devices over the bluetooth.

I need to display this

Answer 1

The problem is that ViewController() is not your view controller. It is a new separate instance. You need to refer to your existing view controller.

Answer 2

So, as @matt pointed out, the problem was that I was instantiating a new ViewController in AppDelegate, so to solve this I did:

let navController       = self.window?.rootViewController as! UINavigationController

newViewController       = navController.visibleViewController as! ViewController

to, as I understand it, pull the reference to the existing ViewController from the navigation controller.

Then refering to

newViewController.refresh()

correctly updates the tableView.

I welcome any corrections to improve this, but for now my code is working! thanks for the help everyone.